Dometic 300 Toilet Smell Issue - DIY Repair - Step-By-Step Process

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In this video, we will go over the step-by-step process of repairing the Dometic 300 toilet on my 2020 Keystone Bullet 243BHS. We did this after noticing a strong urine smell coming from a recently replaced toilet. Having previously replaced the toilet two times, we decided to take a different approach this time and disassembled the toilet and rebuilt it.
Dometic 300 Toilet Replacement: • 5 Tips for Black Tank ...
Step-By-Step Process Document: johnmarucci.com/docs-downloads/
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Опубликовано:

15 янв 2022

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Комментарии : 264

@marynadippenaar8889 3 месяца назад

We have the same issue and are in the process of fixing the toilet. Please explain in layman's terms what causes this issue. Also, Please let me know if this fix has worked for you for 2 years since you posted the video. If its not a permanent fix, which toilet would you recommend in place of the Dometic 300?

@JohnMarucci 3 месяца назад

Let me answer your three questions in reverse. Dometic has a toilet (model 310) with a ceramic bowl that does not have the same issue as the model 300. I would upgrade to this model but do not have enough room between the back of the toilet and bathroom wall. If memory serves, you need 10.5” from the bolts on the toilet base and the back wall to upgrade. Q2: the fix has worked well long term and highly recommend doing it before installing a new 300 toilet. Q1: I only have theory why the issue occurs as Dometic is not inclined to reveal why the problem happens. My take is that a vacuum suction occurs at the seal between the inner and outer plastic bowls when getting up off the toilet. Over time, this becomes worse and more liquids are pulled into the outer bowl. Hope this helps!

@marynadippenaar8889 3 месяца назад

Very helpful. Appreciated 🎉

@ericbittner6505 2 месяца назад

Piss poor design

@estherwiley5718 2 месяца назад

I am going to try this! Our brand new toilet has smelled from day one! We call our trailer our Covid trailer! They got a kittle break in this terrible time and fast tracked trailers on back order to survive the pandemic. I didn’t blame them for this, but oh the problems we have had! We gave up calling for warranty issues and began fixing things ourselves. We love, love, love, our trailer, but it has been disappointing in some areas. I believe you just helped us with the most embarrassing problem! Thank you so much!

@JohnMarucci 2 месяца назад

Glad the video is helpful. The fix as shown in the video has worked long-term. All the best!

@user-iw6lr1ok8y 10 месяцев назад

Thank you so much for this video. 70 year old woman here. Completed this repair this morning because of your excellent instructions. Sure smells better in my trailer, lol😅. Thanks again!

@JohnMarucci 10 месяцев назад

Glad the video was helpful! Congrats of doing the repair yourself!!

@bonniewulff8627 Год назад

We are going through this nightmare right now and I can’t thank you enough for this video and valuable information.

@JohnMarucci Год назад

Glad the video is helpful. This fix worked long-term for me. Hope it goes well!

@z28kindaguy Год назад

Did you do the repair?

@billray6557 7 месяцев назад

@@JohnMaruccidid you put any kind of Vaseline on the bottom black seal that seals to the flange?

@shortygreyhannah 10 месяцев назад

I wish I had the ability to communicate with words just how wonderful and relatable this video is. I live in an RV and there is much to love, but being forced to become an expert and diagnose and fix your own rv issues because of failures of sellers, companies, and repair people is not my favorite part of RVing. This is just so relatable. It is so noble of you to make this video to help others. Thank you.

@JohnMarucci 10 месяцев назад

It is great to hear that this video has been helpful. Thank you for the kind words!

@christophlorne6333 6 дней назад

Good job helping folks out! Logical and practical solution.

@papafredrosebush Месяц назад

I've been battling this for a few years. Tried every chemical known to man. Was afraid I wouldn't be able to get rid of smell so I went with the 310. Love it... and the smell is gone!

@JohnMarucci Месяц назад

Great to hear. Glad the 310 model is working for you. All the best!

@marcuse.9522 2 месяца назад

This is definitely a nightmare, specially on those hot summer days. Awesome video John

@JohnMarucci 2 месяца назад

Glad it was helpful!

@TomBrucker-GoldenYears 9 месяцев назад

Your pain with the Dometic 300 and follow up video I am sure helped many Rv owners . Thank you very much !!!

@JohnMarucci 9 месяцев назад

Glad it helped!

@juneleanos5825 Год назад

SO HELPFUL THANK YOU!!! I’m on a budget and the smell has been driving me insane. So glad you posted this thank you so much

@JohnMarucci Год назад

Glad the video was helpful. This fix worked well for me long term. All the best!

@bugsbeeware 11 месяцев назад

We bought a 2020 Rockwood Mini lite and we have been fighting this ongoing urine smell for months!!! We took the mini lite in to a Family owned RV repair shop and they didn't have your solution! We owned travel trailers over the years and knew this smell was NOT normal. Thank you so much for your informative video. We are so excited to know we can fix this ourselves and we look forward to checking out your website now too. 😀

@JohnMarucci 11 месяцев назад

Glad the video could be of help. The solution presented last a very long time.

@brucehughart4894 5 месяцев назад

Just got back home from a stinky trip to the coast. We'll be giving this a try in the next couple days. Thanks!

@JohnMarucci 5 месяцев назад

The fix as presented has lasted long term. All the best!

@drbosshard Год назад

Great video! Great advice! We've been chasing down this exact problem for several years and, as soon as I watched this, I was pretty sure this was our exact problem. Your instructions were great and the disassembly was pretty easy. The re-assembly was aided greatly by using the Ace Hardware 10-in-1 multi-tool (2 of them) to put together to fasten the FOUR hex-head screws. You mentioned that an extra-long screwdriver should be used, but I found using the 5/16" hex driver on the multi-tool worked MUCH better! There's no slipping out of the slot then as you would have with a straight screwdriver. We've been out on several camp ventures since applying your fix... and regular inspections appear to show it's 100% solved! Thanks so very much for your great video.

@JohnMarucci Год назад

Great to hear that the video was helpful. Thanks for adding the tip about using the hex tool. All the best!

@kathyrandolph1375 Год назад

Thank you!! Appreciate your thoroughness to fix the problem. It is worth giving it a try.

@JohnMarucci Год назад

Glad the video was helpful!

@pin17 Год назад

This was incredibly helpful in diagnosing my problem. Ended up opting to upgrade to the 310, thanks for the info.

@JohnMarucci Год назад

Glad the video helped. All the best!

@Winging-it-1000 Год назад

Yes! OMG! Working on it now. Noticed the residual water would turn brown between uses. Thank you soooooo much for your explanation.

@JohnMarucci Год назад

Glad the video was helpful. All the best!

@cristianorosa1393 2 года назад

Very good John! Your videos have helped me greatly, including this one.

@JohnMarucci 2 года назад

Glad the videos have been helpful!

@ab3day 2 года назад

Thank you for your extremely informative, easy to follow video! We picked up our camper from storage yesterday (after only 5 days…we used it last weekend) and it reeked! I had just read a post on FB from a guy who finally figured out what the issue was. My husband searched RU-vid and came across your video. We were able to pull, drain (>1/2 gallon of yuck), clean, reseal and reinstall our unit this morning. Our campier is airing out and the smell is dissipating. I will be contacting Dometic on Monday and see if they’ll send us a replacement unit.

@JohnMarucci 2 года назад

Great to hear that the video was helpful! The fix I show in the video has lasted for a long time and many nights use. Thanks!

@christinalowe33 11 месяцев назад

Does anyone know how to get rid of the urine smell from the leak the faulty toilet caused? We replaced our 300 with a different toilet and I can not get the Irvine smell to go away. I assume it is still in the subfloor.

@terrihathaway7285 Год назад

Thanks John! Been using your videos since we had an RPod. Recently upgraded to a Wildwood Xlite. This first year out I've brought all my tools with me because something has gone wrong on every trip. I was searching how to remove the toilet when I saw this video. The outer bowl was full of urine. Thanks so much. I was able to fix it before everyone got back from the beach!

@JohnMarucci Год назад

Glad to hear that the video was helpful! My fix for this worked well long-term for me.

@reggie9257 Год назад

THANK YOU! for this video. The smell problem developed for us last week. I cleaned the black tank a number of times without success. Then I found this video, had no idea this was an issue, but this was the problem. Not going to try to fix it, new toilet coming next week! Thank you Again!

@JohnMarucci Год назад

Glad the video was helpful!

@SoCalSeaChaser Год назад

Same exact situation here and I too will be replacing the toilet and tossing the 300 in the trash where it should be.

@ericbarnes5215 10 месяцев назад

I have this exact problem. Thanks for taking the time to figure this out and share!!!!!

@JohnMarucci 10 месяцев назад

Glad the video is helpful. FYI, the fix as shown in the video held up for the long term without issue.

@patricktorstenson9607 Год назад

This confirmed the issue I’ve experienced and what PITA it has been with smell. Awesome tip! Thx

@JohnMarucci Год назад

Glad it helped!

@williamfry6087 Год назад

Amazing, your attention to detail and methods are great.

@JohnMarucci Год назад

Glad the video was helpful!

@davidhoover3597 Год назад

Thank-you for this fix John! We had the same issue with a 2016 Keystone Hideout with the Dometic 300 toilet, that trailer,had enough clearance so replaced it with the 310 porcelain toilet problem solved. We upgraded to a 2020 Bullet 2200BHS last fall, haven’t camped in it yet but plan to do your toilet modifications before heading out. Will be interesting to see if we encounter the other issues you have documented. Thanks again.

@JohnMarucci Год назад

I only wish I could fit a 310 in my unit. The good news is the fix as shown has held up without issue for well over 150 nights of use. All the best!

@ronaho8940 Год назад

Yep just bought a 2011 copper canyon 5th wheel camper,and noticed a sewer smell every time we used the bathroom,I’ll be trying this method .it has a dometic 300 toilet,I liked and subscribed,thank you very much for the info love the good info I get to fix things.

@JohnMarucci Год назад

Thanks! All the best!

@dpd653 2 года назад

Hey just wanted to say thanks your video was one that helped me do the swap out. Appreciate it.

@JohnMarucci 2 года назад

Glad to hear that the video was helpful!

@rebeccaharter5707 2 года назад

We have a 2015 Grey Wolf, with the same toilet. We also noticed the same urine smell. I scrubbed everything in the bathroom and still the smell. After reading online, dometic has know about this issue for a long time. It's a shame that they haven't redesigned the 300 and fixed the issue. We upgraded to the 320 since we did have enough space and no smells as of now. Thank you for the video and if we have to replace the 320 back to a 300 we'll do this before installation.

@JohnMarucci 2 года назад

Glad the 320 model will fit. The 300 just shouldn’t be in any trailer. My repair depicted in this video did work well, however, and I’ve gotten over 100 nights without any issues after the fix. Thanks!

@lindagardner1257 2 года назад

Same issue just started checking in on it. Hope to solve it soon. Thanks

@JohnMarucci 2 года назад

Just a quick note that the fix on this video has held up for months of regular use with no further issues. Thanks!

@pauldurocher9948 Год назад

same problem you had, will repair, thank you for the info....

@JohnMarucci Год назад

Glad it helped. The fix as depicted worked long-term for me. All the best!

@rickvanderp6988 Год назад

I have had the same issues!!! I will try your solution! Thanks

@JohnMarucci Год назад

The solution has worked well for a while now for me. Well over 100 nights of use after the fix and no issues. All the best!

@anthonyacosta5330 21 день назад

Going to do this tomorrow, thanks for the step by step instructions!

@JohnMarucci 21 день назад

Glad the video was helpful. The fix as shown has worked well over time. All the best!

@myronmcginley7053 4 месяца назад

Excellent! Thank you & safe travels.

@JohnMarucci 4 месяца назад

Glad the video was helpful! This fix has work long-term for me.

@user-yj5bj4ei4n 10 месяцев назад

I have the same problem with mine. I’m going to try your method of fixing the problem. Thank you for making the great video/videos. Awesome channel

@JohnMarucci 10 месяцев назад

The fix as shown worked well for a long time. All the best!

@shawnaoverton7623 2 года назад

I have the same problem thank you for the tutorial

@JohnMarucci 2 года назад

Great to hear that the video was helpful!

@franciscocontreras5470 4 месяца назад

Great video. Thanks.

@mikefitzpatrick1833 2 года назад

Thanks for the video. We just completed an outing with our 2020 Puma and noticed a strong urine smell at the beginning of the trip. We found your video and did indeed determine the 'outer' area was full of urine that has seeped through the seal. We were able to soak up a lot of the urine and then poured vinegar in the area to counter the smell while we completed our trip. I will follow your video this week to hopefully correct the problem as you have shown. It is frustrating that this model of toilet has such a problem. Last year I had seen issues with this toilet and some mention of a recall but after calling Dometic they said there was no recall and could only be replaced under warranty. Since we did not have the problem then we could not get it replaced. We are now out of warranty, but hey such is the life with an RV. Thanks again.

@JohnMarucci 2 года назад

Sorry to this. The 300 model is not a good product and the manufacturer and maker should recall them. I did seal my last one and it has held up well with no issues. Thanks!

@mikefitzpatrick1833 2 года назад

@@JohnMarucci I contacted Dometic this morning and they had extended the warranty from 2 years to 3 years which I was just covered. They are sending me a new 300 model but will not arrive until September. However, if they have not changed anything with the design then it will still have the same issue I assume. Meanwhile I took the current toilet apart and cleaned it up and will let it and the seals dry over night. Tomorrow I will caulk and reinstall and hopefully that will cure the problem.

@mikefitzpatrick1833 2 года назад

Update: My toilet which was not going to arrive until September arrived two days ago. So do I assume the new toilet is new and improved over the 2019 version that I have or as I tend to believe it is the same toilet design that I have and eventually will fail as well. I am leaning towards putting in the old one that I caulked as was done in John's video so as not to worry about the issue.

@JohnMarucci 2 года назад

@@mikefitzpatrick1833 I caulked my existing one and reinstalled and saved the one received from Dometic. Your call.

@JimC714 Год назад

Thank you so much!!! This was exactly what happened to us!

@JohnMarucci Год назад

Glad the video was helpful!

@garyrose2074 Год назад

You just fixed my issue. Thank you so much!

@JohnMarucci Год назад

Glad I could help!

@timothycraig2206 11 месяцев назад

Just did this repair today. However, mine did not have that 2nd smaller diameter gasket inside that you put caulk on. My rectangular seal had slipped also, so I adjusted it and put silicone caulk around it. Camper is almost 4 years old and just had this leak problem happen. Easy fix though. Thanks for the video! 😁

@JohnMarucci 11 месяцев назад

Yep, the fix as shown lasted a very long time without any issues,

@robertosanchez1186 8 месяцев назад

Hey Timothy. It’s it still working. I applied this to our rv toilet but it’s still leaking.

@billray6557 7 месяцев назад

I was wondering if you let the silicone dry 1st, even though it is waterproof?

@user-fu7lt1vk5q 11 месяцев назад

Thanks, very helpful. Same inner to outer bowl leak and resulting odor from collecting in the outter bowl. Will repair it the same manner until we find a suitable replacement. Thanks again.

@JohnMarucci 11 месяцев назад

Glad it helped, the solution as presented worked well for the long-term.

@vince5U Месяц назад

Excellent video! We purchased a used 2020 Cherokee Grey Wolf Limited camper that’s in great condition. After the second outing, I could no longer handle the smell. It smelled like a stadium urinal. I did remove the toilet and sure enough there was sewage build up. The manufacture label on the toilet was 6/4/2019. I did attempt to seperate the bowl from the base but ended up cracking it. Subsequently, I replaced the toilet with the 310 model. I also want to mention that the manufacturer did not have the flange which was broken screwed into the floor. The flange was seated onto a metal ring that was screwed to the floor by two screws which held the T bolts. I replaced the flange as well which I attached to a pvc pipe which was inserted into a rubber gasket that lead to the black tank.

@JohnMarucci Месяц назад

Good call to replace with a 310, as long as you have clearance to do so. Unfortunately, many of us do not have the needed 10.5" or move and are stuck with the 300 models. Thanks for sharing your experience. All the best!

@MR-si1eq 2 года назад

I have a 2021 Forest River Rockwood. Knock on wood. So far, so good. If there is a problem I will have them replace it if its still under warranty. Otherwise this is great future info. Thank you.

@JohnMarucci 2 года назад

Thanks for the comment, all the best!

@reneedennis9495 Год назад

Sir. this video is a life saver.You explained the problem and fix informatively and completely, my partner was able to fix it. We have a 310 it was the same. Thank you for sharing this.

@JohnMarucci Год назад

Glad the video was helpful!

@justinkeller4008 Год назад

I have a 310 that I think has the same issue. Thanks for the comment

@user-ff8vk1zv7r Год назад

Great information. I’ve been dealing with this problem for 4 years always thinking the problem was in the holding tank. I thought maybe the toilet was not tight enough to the flange. When I attempted remove the caps I leaned on the toilet seat and notice drips coming out between the two sections of the toilet. That’s when I started looking for solutions to the problem and was lucky enough to find your video. I think I will apply some some silicone to the bigger seal as well. Thank you for your great video Paul

@JohnMarucci Год назад

Great to hear that the video was helpful!

@user-ff8vk1zv7r Год назад

@@JohnMarucci I’m going to put silicone on the oblong gasket as well.

@pcOT-0z4 2 месяца назад

Thank you for creating this video; I am ezperience the same condition you have created a solution for. I'm going to try your fix before purching a new toliet.

@JohnMarucci 2 месяца назад

Glad it was helpful!

@jeffreyshort9243 Год назад

Great video well explain you been a great help!!!

@JohnMarucci Год назад

Glad the video was helpful!

@uhhuh6323 Год назад

Great video it helped me greatly 😅

@JohnMarucci Год назад

Glad to hear it!

@patriciapurdy6664 Год назад

We had the same problem pretty much did what you did and it has worked for 2+years. Now we have a new issue. The pedal won't open the flush valve at the bottom. I just bought a new Thetford toilet. No more Dometics for me. Thanks for the video.

@JohnMarucci Год назад

Thanks for sharing your experience. All the best!

@daylenisfernandez8574 9 месяцев назад

Thank you so much for your video, we are having the same issue and could not figure what the problem is. We will definitely do the repair process.

@JohnMarucci 9 месяцев назад

Glad the video is helpful!

@richardbriggs3868 Год назад

I had the same problem and tried your fix. Will follow up if i have any issues

@JohnMarucci Год назад

Sounds good. The fix worked well for me long term.

@jaysom2240 Год назад

Yep yep and yep. Great video. Thank you.

@JohnMarucci Год назад

Glad the video was helpful!

@buddyfulgham6515 3 месяца назад

Thank you for this "How To" video. We have a 2018 Winnebago Micro Mini that has/had the Dometic 300 and it developed the problems you described. I contacted Dometic, and they declined to replace the unit as it was outside the "warranty period". I did 2 things: 1 Purchased, and installed, the Dometic 310. It mounts VERY close to the wall, but it fits and is a much nicer toilet. 2 I went through your repair/rebuild steps. (We now have a spare should the 310 develop the problem as well) I noticed a couple of differences with mine..... There was only one ring between on the sleeve between the internal and external bowls. The ring on mine is the thicker ring that is shown in your video. There was obvious leakage through the seal between the outer bowl and the base....the seal you did not use the silicone seal on. Before sealing the locations, I pulled the flush ball seal, thoroughly cleaned it, liberally coated all surfaces, in the groove and top and bottom surfaces, with silicone dielectric grease, and installed the flush ball seal back in the outer shell. I did this to prevent any squeeze-out of the silicon seal/caulk that I LIBERALLY applied on the internal rings and the external gasket from sticking to (or interfering with the flush ball seal.....there is very little clearance between the seal and the shells) Oh, one other thing I did differently, I took the water flush valve out of the base. Doing so made it easy to haul each half to the water hose for rinsing and turning things around to better clean without having to wrestle both shells.

@JohnMarucci 3 месяца назад

Sounds like you did a very thorough job. Good call on upgrading to the 310 model as I haven’t heard of the same issue with the 310. It also sounds like the newer 300 models may have a thicker gasket. Not sure it will make a difference on the issue. The fix as shown has worked well over the long haul. All the best!

@noahmclaughlin3005 3 месяца назад

This worked! When I opened mine up, there were NO RINGS! Not even one… so I just put a super thick layer of silicone all the way around, top to bottom and then closed it back up. Haven’t had any smell since! Thanks for the video! 🎉

@JohnMarucci 3 месяца назад

Glad it helped!

@sueharris8685 10 месяцев назад

Thanks for your video. We have the same problem with our 2020 Rockwood Minilite. I hope they will send me a replacement.

@JohnMarucci 10 месяцев назад

The repair isn't very difficult if Dometic won't send a replacement.

@goforet Год назад

Just finished mine..... no small inner seal on my toilet. Went very well just as you explained. But, no fun cleaning where the urine was holding inside. Thanks for video.

@JohnMarucci Год назад

Glad the video was helpful!

@KevinandKimOutdoorAdventures 11 месяцев назад

This sounds like the exact problem we have with our 2020 bullet Thanks.

@JohnMarucci 11 месяцев назад

FYI, the solution as presented worked for a very long time.

@strangeadv4977 2 года назад

Sorry to hear about the crappy situation John 😉 We all appreciate your thorough work to make and edit a video like this. Just dropped off the Rpod 202 for some warranty work but thankfully this was not one of them. Keep it up my friend!!

@JohnMarucci 2 года назад

Thanks, will do! Hope everything goes well with your R-Pod!

@kc-he2xw Год назад

I just did same repair but also used plumbers tape . Directly on plastic bowls and then slid on the gaskets with silicone. As a note there was only 1 gasket on the neck of the inner bowl . Once everything was put together I could tell it was very snug and much more so compared to when I took the 2 bowls apart . Once out together I noticed while looking into bowl of toilet a small gap between the flush valve and upper bowl so I used addition silicone all around the base of the flush valve . I’m headed to Yellowstone hope this repair holds up !

@JohnMarucci Год назад

Thanks for sharing your experience! Feel free to post back how things work out.

@nwertz97 Год назад

I just took mine apart and discovered only a single seal too. Our camper is a 2019 model.

@blj859 2 года назад

Many years ago I’d travel with a spare alternator, fan belts etc …. Never in a million years thought that at some point in my life I’d need to carry along a spare toilet!😂

@JohnMarucci 2 года назад

No kidding! It’s ridiculous that I’ve been doing this. The option has been horrible if you have this stench permeate your trailer.

@michaelemhuff4196 2 года назад

Same problem. 2020 prowler 240rb. All ready replace leaking foot valve myself. Called about recall said needs to be an rv dealership. Why I do better work and that is obvious by all the problems I've fixed while under a worthless warranty. Thanks I will try when we get home it is obvious this is an issue with the toilet.

@JohnMarucci 2 года назад

The fix I did in this video has lasted. More than 100 nights use later an no issues.

@rbh6479 Год назад

Great information. We have this same issue & apparently Dometic hasn’t taken care of the issue because the manufacture date is May 2022 on the sticker. Looks like I have a project. Thank you.

@JohnMarucci Год назад

Glad to be of help. The solution presented lasted well for me. All the best!

@saltyreef3714 11 месяцев назад

First trailer, 2022 model brand new, first campaign trip, 5 people. The second day there is a faint smell. I thought the kids were being messy, third day it got worse. I chased it down to a pool of yellow liquid inside with flashlight and an awkward angle in the back. Googling the problem, got me to your video. Going home tomorrow, will try your solution fix. Thank you so much for posting the step-by-step process. It's a shame what the industry has become. Every RV line and product has issues. Sadly, all made in America, and nobody cares. Poor production process, no quality control. Thanks again for the info. And good luck everyone.

@JohnMarucci 11 месяцев назад

The fix from the video lasted a very long time without issue. All the best!

@michaelhaney342 10 месяцев назад

We had this issue when this video first came out did this reseal worked great but now its starting to to it again. We are going to pull it back out and re do it but think im going to go thicker and with new seals. Appreciate your video its sad that they keep selling this toilet with no redesign.

@JohnMarucci 10 месяцев назад

The fix as shown lasted for a very long time, to the point that other parts of the toilet were getting worn out. I replaced the toilet again last spring with a new 300 and immediately did this fix before installing.

@lickitysplit2413 2 года назад

My Dometic 300 toilet only had the thicker seal in that area. I did not have the o-ring type seal in that area. I slid thicker seal back on and applied Lexan caulk in that area along with applying it on bottom and top side of the foam gasket that seals pedestal to bowl area.

@JohnMarucci 2 года назад

Sounds like a good fix. Hopefully you won’t ever have the issue. Thanks!

@bw6078 2 года назад

Why would they use two seal rings on the same connection? I've never seen that work in any situation. Thanks for sharing.

@JohnMarucci 2 года назад

I also have no idea why they would do this. Thanks for sharing!

@stonybuckner9928 Год назад

we have the same 300 medel Dometic in our RV and same issues causing some leakage of water around the base at the floor. Also flushing ball valve sticks every now and then in open flush position finally relaxing and stopping most episodes but often requiring me to cut the water off for a few hrs to a day . I installed an inline cut off valve to enable us to continue using the water supply for the rest of the camper while this issue happens.

@JohnMarucci Год назад

I also installed an in-line cut off valve at the toilet which is comes in very handy. It isn't too difficult to fix the toilet but you do need a very long flat head screwdriver.

@Drewberg316 2 года назад

Great video, thanks for putting it together. I myself just started having this issue about 4 weeks ago and I had no idea what the smell was until typing in specific wording into google and boom there was my problem. I cleaned non stop thinking kids were missing the toilet and yet it still stunk. Since my toilet was under warranty they sent me another 300 to install and they claimed the issue is completely fixed now on the new 300 toilets, but I wonder if they really are? I think I’m going to play it safe and follow your video so I don’t have to go through the issue again. Thanks again for the video, safe camping.

@JohnMarucci 2 года назад

It is possible the new model is clear of the problem but to your point, how will you know until it is installed and hopefully working. I suppose I would do what you are considering and caulk the seals on the new toilet. Mine has worked flawlessly over 100 nights of use since the fix shown on the video. Thanks!

@Drewberg316 2 года назад

@@JohnMarucci I rather be safe then sorry at this point because it’s my only replacement they will give me free of charge. Rather not find out the hard way it’s still a problem, so might as well take an extra step and be safe. Thanks!

@ptooti Год назад

@@Drewberg316 I got a replacement from Dometic and did the re-seal on the brand new unit just to be sure the new unit i got had one seal and a hard plastic ring like a spacer I just gooped the heck out of it and put it back together and installed so far so good

@Drewberg316 Год назад

@@ptooti I did also get a replacement toilet from them. The new one like you said had a plastic and rubber seal. I took it apart and sealed it and it failed within my first few uses. So I took it back out and back apart, cleaned it up and sealed it again using a ton of caulk this time. Hopefully it’ll hold up, we will see.

@erniehampton5809 Год назад

Thank you for your exceptional video. Thoroughly explained everything , thank you very much you’ve made it very easy to understand with a few great tips .

@RobinGates-t9f 7 дней назад

Thank you! We took our toilet apart as you did in video. Ours only had one seal on it. Manufactured in 2016 and in a 2017 Roo. Should we add another seal?

@JohnMarucci 7 дней назад

I'd try the silicone fix as displayed first. It may work just fine. You can always circle back, but the fix as shown should work.

@bishopgeorge1333 12 дней назад

I have a 320 and still have this problem but after watching a few video I will be doing these steps.

@JohnMarucci 11 дней назад

That's the first I have heard of the 320 having the same issue. Hopefully the same steps will yield good results. This fix as shown has worked well over the long haul. All the best!

@dad2girls603 2 года назад

John great video. Can you explain whether silicone chaulk or or grease is better. I'm doing mine tomorrow and a few sites mention grease. I have clear DAP that says it's better than silicone. Thanks in advance.

@JohnMarucci 2 года назад

I used clear silicon and haven't had any issues. Generally a good waterproof sealant should work.

@dad2girls603 2 года назад

@@JohnMarucci I just did mine and mine only had 1 gasket on inner flange. I got it all together and sprung a leak where the 90 attaches to the flush valve.. trying to figure out that diameter for tomorrow's fix.. lol.. thanks for the help..👍👍

@markrose8622 2 года назад

Your video was fantastic. I think this is my problem however I have the 310 model. Do you know if I can take it apart and do the same fix?

@JohnMarucci 2 года назад

The 310 should not have the same issue. I believe it is a one-piece bowl. Likely you have a different problem. Thanks!

@justinkeller4008 Год назад

Did you ever take yours apart?

@googleyoutube766 3 месяца назад

so I have a 2019 Keystone and in May 2023 we found this problem. I bought a new Dometic 300 (only one that fits with the wall clearance) and installed it. 8 nights of camping later the smell is back. Called Dometic and they will replace it under warranty and continue to replace it for 2 years from my original purchase date; so if you buy a new one SAVE YOUR RECEIPT. I had a long chat with a second tier support person. They are aware of the problem and are actually trying different gasket materials but she said just keep my receipt and if it leaks let them warranty it. I am going to try this repair on the 2023 model that I just replaced and keep it as a backup for when my two years is up. Hey John, how about a quick update on how your repair worked out over the long haul?

@JohnMarucci 3 месяца назад

The repair I showed has lasted a very long time without issue. Thanks!

@sethwarren9663 Месяц назад

Great video! Only had one seal ring present when I took the toilet 7:43 apart. The smaller one is missing. Do you know where I could purchase one?

@JohnMarucci Месяц назад

I think the units with only one ring are later models. I am not sure where you would get a second gasket or if it is needed. Others have followed the procedure in the video and applied silicone to the single gasket.

@rfigueroa76 Год назад

Thanks! Great info. Called Dometic today. They said I should have a new toilet delivered to my house in 10 days. In the meantime, I'm on the road for the next two weeks so I will use your method. I see you posted this video sometime ago. How long did your fix last?

@JohnMarucci Год назад

The fix last a very long time without issue.

@GratefulWarriorMom Год назад

Hi, thanks for the video. Im dealing with this now with my dometic 300. I just pulled it out and the subfloor is ruined. Id like to get dometic to replace it but in the meantime, i still need the toilet. I will attempt this repair and see what happens. We had to break the flang as it was stuck or glued in the tank somehow. My dad realized, after the fact, that it screws in somehow. So, i guess i have to get a new flange, if possible. What happened with Dometic sending you a new toilet? Did the fix work for the long term?

@JohnMarucci Год назад

It took months to get a replacement toilet last time. The fix as shown did work without any issues long term.

@huntinzombie29 2 года назад

I'm no rocket scientist...but what an absolutley piss poor design. We are having the exact same issue. I stuck my hand with a lysol wipe inside the rear of the toilet. It came out stained yellow and smelling horrible. I cleaned as best I could and sprayed inside the area with a good enzyme digester. It worked for a month or so, then the smell returned. I checked the same area with the same result. I found your video and voila....I am replacing mine with the 310 version. I will do whatever I have to make it happen. Thank you for your great in depth video.

@JohnMarucci 2 года назад

Bret, glad the video helped. Also glad you have the additional space to put in the 310. I think you’ll be much happier. All the best!

@davidball3349 Год назад

Because of the urine odor in my TT purchased in 7/2021, I removed my toilet today and disassembled it as shown in this video. There was a significant amount of stinking liquid in the outer bowl. I dumped the liquid, cleaned the inside of the outer bowl and outside of the inner bowl. My toilet had a clear seal and a black seal instead of two black seals which I guess won’t make any difference.? Toilet Manufacture date was 5/12/21. I’m going to apply the silicon caulk to the seals and reassemble it. Hopefully this will fix the situation since we’re going on a 3 1/2 week trip in two weeks! I guess we’ll have to wait and see.

@JohnMarucci Год назад

Hopefully it will work well long term. The fix done in the video has held up well for me. All the best!

@davidball3349 Год назад

@@JohnMarucci I haven’t been able to see about urine leaking since it’s just sitting under the shelter but now it won’t hold water. Maybe I didn’t get a sufficient amount of silicone caulk or somehow gaps were left. ?? The clear seal is more of a plastic ring. It seems that a better seal would be made if the rubber seals were up against the plastic ring. I.e., not two flexible seals up against each other. Any thoughts?

@JohnMarucci Год назад

Sounds like possibly it may not have been reassemble properly? Maybe try it again?

@davidball3349 Год назад

@@JohnMarucci good news! We called Dometic. The customer service lady was well aware of the issue and was very helpful. Since they’re out of the 300’s we’re getting a 310 at no charge! May not be here before we leave for the long trip so I’ll have to make sure I get this fix to work for the trip. That’s ok there!

@user-vo3ul9zo6v Год назад

John, been searching for this solution for some time now. I tore toilet apart but I only have 1 seal between inner and outer bowl. One seal looks flat and other looks like an o-ring (i have this one). Could I pick up a seal at big box store to add or should I put it back together they way it came apart? Thanks for the unfo

@JohnMarucci Год назад

I would follow the step in the video and not add new gaskets into the toilet. Just apply the silicone as shown to the gasket already in the toilet.

@tellsitasitis Год назад

John, do you keep your fan on in the bathroom? Exhaust fan?

@JohnMarucci Год назад

Not all the time. Usually when using the bathroom and then to get a breeze through the cabin at times. I did have the stock fan replaced with a Max Air fan for more flow. Thanks!

@tammieeakins3060 Год назад

I have the same problem and I am wondering if replacing it with a porcelain would help. It was replaced by the dealer before warranty was out. Since then, the replacement does not allow the flap to close and water to fill into bowl, as the original did. Is there a fix for this that you know of?

@JohnMarucci Год назад

If you can replace the 300 model with the 310 ceramic bowl model, it may be worth it. The main issue is you need more clearance behind toilet to accommodate the larger size 310 model. The rough in measurement goes from 8.5" to 10" from the 300 to the 310 model, so be sure you have this amount of space from the center bolts to the wall behind the toilet. Here is a link to etrailer for several of the models: www.etrailer.com/dept-pg-RV_Toilets-pm-Dometic.aspx

@shawnapooley8946 5 месяцев назад

So I have this issue, but it also makes my water pump randomly kick on . Will this fix also fix the water pump from kicking on randomly? (So long as I have no water leaks elsewhere)

@JohnMarucci 5 месяцев назад

Take at look at my video on the water pump issue if you haven’t already: RV Water Pump Troubleshooting ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-PdtMjxLzhJQ.html

@theomatthias9804 10 месяцев назад

So, what’s the verdict on the long-term effectiveness of this fix? Has the inner bowl leaked into the outer bowl during the last 20-months? We are trying to find another toilet compatible with our 9” offset but haven’t found one. If this fix works in the long term, I’ll start on it right away!

@JohnMarucci 10 месяцев назад

The fix held up without ever leaking again. The video was shot on November 19, 2021 and we had to replace the toilet due to normal wear (foot pedal spring was worn out) on February 8, 2023, after over 220 days and nights of full use. I immediately sealed the gaskets when installing the new one. Highly recommended.

@johnsesk01 Год назад

Hi, how long do the seals last between replacement ?

@JohnMarucci Год назад

I used the toilet for almost 200 nights with no issues on the seals where I applied silicon.

@tonydanielleirby9180 Год назад

Id like to know if this compleatly fixed the issue and is it still working

@JohnMarucci Год назад

It did fix the issue and I used the trailer over 100 nights since the fix without the issue recurring.

@brucepherson417 9 месяцев назад

Hi John, I have a question. I took my toilet apart and there was only one seal in there. Do all 300’s have two seals?

@JohnMarucci 9 месяцев назад

I believe they may have changed the number of seals at some point. The solution should work indifferent of the number of seals.

@toddsigler4407 Месяц назад

Hello, Thanks for your video. Like many, we have recently encountered this problem. Original toilet built in 2019. They sent a new toilet manufactured in May 2014. Has the problem been fixed in this toilet or do we need to “enhance” it before installing it? We appreciate you.

@JohnMarucci Месяц назад

I am hearing that the problem has been fixed, but I personally would still do the process I show on any new 300 toilet (although it may void a warranty). The fix as shown has held up over hundreds of nights of use. All the best!

@toddsigler4407 Месяц назад

Thank you so much. That is exactly what we did. Appreciate you.

@tborto7447 4 месяца назад

So this doesn't apply to the porcelain bowl models? We have a 310 plastic bowl and are going to a 320 porcelain

@JohnMarucci 4 месяца назад

Correct, it should not apply to the porcelain models.

@christinalowe33 11 месяцев назад

We just went through this too! I wonder how the manufacturer can be held accountable?

@JohnMarucci 11 месяцев назад

I don’t think there is any recourse other than to expose issues like this online. It’s important to also expose the RV manufacturers who continue to use certain components. This specific toilet has fully ruined many people’s camping trips.

@christinalowe33 11 месяцев назад

@@JohnMarucci How did you get rid of the urine smell? I am pretty sure it leaked into the subfloor.

@mikeholman863 2 года назад

Have the same issue, just started after 2 years, ugh....

@JohnMarucci 2 года назад

Yeah, not sure why they kept using this toilet for so long. FYI, the fix I show in the video has worked well for over 100 nights of use after doing the fix.

@shirleywilbur903 10 месяцев назад

Our ring that screws to flow has broken what can we do,can it be replaced

@shirleywilbur903 10 месяцев назад

Meant to write floor

@JohnMarucci 10 месяцев назад

The floor bolts should be removable as shown at timestamp: 6:00. A new toilet will come with these two bolts. You also likely can find replacement bolts online. For example, here is the Dometic replacement gasket kit from my Amazon store: amzn.to/3EXYTuz

@kylehnat259 2 года назад

I just got home from a four day camping trip of blaming the kids the whole time on missing the toilet. Your video is spot on with the issues I’m having. Smell starts off faint and now it is horrible. Like you said no sewage smell just urine. Hopefully I can get this fixed because we have a lot of trips planned!

@JohnMarucci 2 года назад

I used my trailer for well over 100 days after the fix depicted in this video with zero odor issues. So far, so good. Thanks!

@ptooti Год назад

My opinion I don't think it's a vacuum problem as these inner and outer bowls are not air tight (at all) between the two. It's probably just leaking wastewater But your video is great and I did my Dometic 300 as well thanks for the video

@JohnMarucci Год назад

Thanks for sharing!

@alcornat3 Год назад

I noticed that I only have a single ring and not two. Should I just caulk over top of that ring?

@JohnMarucci Год назад

That's what I would do.

@user-cu1gf2en3h Год назад

@@JohnMarucci I had the same question - mine has a plastic spacer ring, and only a square ring. I plan to to caulk well over all, after acetone cleaning to remove any silicone grease and then a light (400 grit) sanding for better adhesion.

@davidcooper3871 Год назад

My base seal is leaking since the 4 flathead screws are loose. Waiting for that special oblong gasket.

@JohnMarucci Год назад

So you plan to replace the oblong gasket and reinstall the same toilet, correct?

@Livefreewhileucan 11 месяцев назад

Me too. 2018 bullet premier. Stiiiiiiiinnnkkkky

@JohnMarucci 11 месяцев назад

FYI, the solution as shown worked well for a very long time.

@michaelgiovanniello3230 Год назад

Does this only happen on the Dometic 300? I have another Dometic toilet that is smelling, even though there is water in the bowl.

@JohnMarucci Год назад

Not sure if it happens to other models, but it is limited to plastic models as far as I am aware.

@michaelgiovanniello3230 Год назад

@@JohnMarucci Ahh, thanks. Mine is ceramic, but still i'm having oder problems. I've tried so many things to rectify this

@dougl6219 2 года назад

Thanks for the helpful video. I would suggest cleaning the sealing surface on both the inner and outer bowl with a degreaser, such as brake clean or electronic contact cleaner to help the silicone sealant bond to both surfaces. This will also make it very difficult to separate the inner and outer bowl a second time, as they will now be glued together.

@JohnMarucci 2 года назад

Thanks for the suggestion. As an fyi, the solution in this video seems to have worked as I was in the trailer for over 100 nights after the fix with zero issues. Thanks again for the comment!

@loreo2384 Год назад

Dad has a domestic 300. It was leaking at the bottom wet and damaged floor. Replaced seal at bottom. No more leaks. Then it was over flowing. Replaced the valve. Now the water is not flowing to flush. Foot pedal works but is not making the flushing sound. Guessing due to water flow. Have to add water for items to flush! Please help.

@JohnMarucci Год назад

It may be that your water line in is clogged or the valve isn't working properly. It may be time for a new toilet. Do you know how old/how much use this one has had? They are very easy to replace.

@loreo2384 Год назад

@JohnMarucci it's a 2017 RV. Not sure about the usage. Sorry.

@chasalter1 Год назад

How do you know what Dometic model toilet you have? Where is the model number?

@JohnMarucci Год назад

I just looked at mine and couldn’t find a sticker. My 300 has a plastic bowl. If it has a ceramic bowl likely it is a 310.

@MarkM-xd2zo Год назад

I have a 2020 Flagstaff Microlite that I just purchased four months ago. Since I bought it, I've been fighting the sewer smell and approaching it from the thought of it being an issue with the tank. I've discovered after a trip with this, when I arrive at my destination, there appears to be light colored were on the floor which is gross! today I finally discovered it's coming from the back of the toilet opening near the water lines, Now I know there is sewage inside the outer bowl after we've used the toilet for urine only, water apparently is getting into the outer bowl which splashes out while towing. After watching this video, I think I will just replace the toilet this is not something I enjoy working on.

@JohnMarucci Год назад

The job isn’t too difficult but it is a bit disgusting. I am sure a local RV dealer or a mobile RV tech would be willing to replace the toilet for you at a price. Thanks!

@MarkM-xd2zo Год назад

@@JohnMarucci I spoke to a local dealer, they can install a new 310 model for approximately $500. Thats slightly more than I'd expect but willing to pay it just to not have to deal with it. We bought the trailer used so messing with that, makes it even more unappealing. thanks for the reply. :)