Sink not draining? Installing Air Admittance Valve Under Kitchen Sink  

There's no vent but it worked for 40 years before installing a boca vent under the sink . I'd probably snake the drain real good before redesigning the cabinet

I would assume that the vent would be extending up from the riser, to the left in the wall, and that this was simply a waste arm. Nothing in what you showed meant there wasn't a vent already.

Now my sprayer wont pull out

It's not going to be above the flood level rim because the flood level rim is the edge of the sink. In other words, you would have to stub out through the countertop for it to be above the flood level rim. Code for AAV's is 4" above the horizontal branch drain or fixture drain being vented (IPC). In other words, you could have stubbed this much lower so that it can more easily be accessed and changed. However, I do understand wanting to put it up higher as well.

There’s a vent back there you just installed a second one

Up charging the customer. Next time send a camera down that trap arm. Guarantee it connects to a stack a few stud bays over. Probably just has a clog.

Im gonna guess that there is an existing vent that is obstructed by leaves or something possibly causing a vapor lock in the sink , toilet or tub so this extra studor vent is a simple cheaper alternative fix to tearing pipe out of an external wall possibly to fix and clean it , sometimes running a water hose in the vent from up top can flush the trash down but that doesn't always work. Ive done this trick before , except without the sprayer looped around the studor vent line lol.

It could have a vent down the line.

The box where the vent came in shows you exactly how it should look 4inch above horizontal branch. I too have made this mistake🫡

Years ago, I would simply plumb a loop underneath the sink, all the way around (high up) with NO VENT, and no smell. 25 years ago, I believe that it was acceptable, and with-in code. It’s a little known trick that most plumbers don’t know about.. Anyhow, I’ve never had any issues with it, and my kitchen and garbage disposal pipes still work awesome. footnote: when I was remodeling my cottage, I was moving the sink to the opposite side of the kitchen (no vent exists), so that my dishwasher (wife) could enjoy the beautiful lake view while doing what wives are supposed to do!!!!! A happy wife is a happy life!!!!

WAIT if this place has no mechanical vent running to the roof won't there be problems with other parts of the house?

Looks like he just blocked in that sprayer nozzle hose to it’s not gonna pull up anymore

Going to have a hell of a time fixing the hole in the wall now🤔

That vent rarely goes straight up in the wall in a kitchen sink, especially if there’s a window right there.

Two things wrong..1 Cannot pull up the sprayer. 2 AAV not always reliable and can smell up the house like a barn.

Good way to get a call back from the customer saying you need to fix my sprayer hose

It was vented. It's called a trap arm. These videos are so funny for those with a plumbing license from the 1980's. haha

LOL! YOU ARE JUST SHOWING OFF YOUR NEW TOOL! HAVE FUN DUDE! LOL!

The flood level is the above the rim of the sink. But good on you for getting higher

😂😂😂😂 perfect video of what not to do!

How do you know it wasn’t a trap arm?

The County south of me doesn't want these installed in any houses, but the county I'm in wants them under every sink even if there is a main vent. Governments are weird.

🎉🎉🎉 You gave them the feature of the AAV and took the feature of the Kitchen spray away. Solved one problem but created another. Great job! Customer wants you back out ASAP because “I can’t wash dishes now”

That Oscillator tool looks brand spankin

At the end, he says, "we've got water running" So, what does this device have to do with that? Doesn't it have to do with the water draining?

row home we had in philly built in 1900 had only 1 vent in center of house for bath none for kitchen in back there called sheds homes had to be masonry but back could have an attached wood room ,used as kitchens or utility rooms even had toilet you accessed outdoors most removed them

How do you know that wasn't on a drain arm and the vent was off to the left?

awesome.. You are giving me information I could not get from a plumber without paying for it.. Thank You

A backup wouldn’t come out of the aav unless the valve had debris in it. It’s only supposed to open due to suction from water going down the drain. It literally can’t open the opposite direction and needs to be air tight to avoid sewer gas seeping out.

Wow, I’m so happy you put some thing that’s going to eventually vent sewer gases underneath my sink because all of them fail

Did you trench the wall to make sure there's no vent, or did you assume there was no vent?

We did a loop vent on a Free Standing Island. The thing that was so funny the electrical inspector knew what it was but the plumbing inspector had never even heard of a loop vent. . So we had to run a simple 2-inch line, over 80 extra feet just so it could go out through the roof????

Good to see plenty knowledgeable replies, making good points. So I won't repeat them, rather point out that you should always ream and bevel your PVC pipe, you can't put a tee on it's back like that, and if you're going through all that trouble, replace that thin wall slip joint crap with Sch 40

I had to do this under the kitchen sink in my old house. Drains were vented fine in the Bath but the kitchen had nothing.

⁠​⁠Good to see someone who actually knows what an air admittance valve is. It actually shows clearly on the box it came in that it’s that. The guy has installed it correctly for the purpose that it’s intended. The only thing that I have an issue with is whether it’s needed. In the UK (I imagine this is US?) our sinks have overflows which are either internal in the case of a ceramic cast sink, or external in the case of a standard bowl. This allows air admittance and is the sink-side of the trap, so no smell. We also use 1 1/2 (Euro 43mm if solvent weld, 40mm if push-fit) for kitchen-sized sinks. Although I appreciate that things are done differently in different locations, I’m wondering, if this sink doesn’t have an overflow-and therefore vent-per above description, who is responsible for mopping the floor when the sink overflows….

Glad to see I’m not the only one who keeps a Folgers can around for draining traps.

That automatic vent is excellent. I use those for years

The vent provides open air DIRECTLY TO THE SEWER LINE. Depending on changes in air pressure from inside to outside it is probable that sewer gas will build up under the sink. Sewer gas can be explosive.

LMFAO 🤣 I used that same Folgers can.

Love your videos big dawg ! Keep them coming !!

You just saved me $175 thx and subscribed👍🏾

You can run one vent through the roof in a house then have the rest on aavs. Very cool product.

First question. Did the drain ever work properly beforehand?

Ps...the flood level rim is the top of the sink basin. You can't get above a stainless drop in, unless your in the wall or above the countertop.

You could have saved yourself, and the customer money by purchasing a ram bit to remove the male fitting, instead of buying the oscillating saw, and hacking the cabinet and drywall… or even adapted to the male fitting…just sayin

I guessed it as soon as you said it might look good from the outside. As a non-plumber, you only learn this by buying a flipped house.

No one can guess what’s wrong because vents are usually inside the wall. Not to mention that the dirty arm can be at least 5’ long. How do we know that the left turn there didn’t connect to a San Tee at the wall to the left there? Last question, why would a professional use a cheater vent anyway?

The south is full of houses with no vents and for sure if there were a vent it's air admittance vent not through the roof for some reason the home owners are scared of an open pipe in the roof.

Rarely run vents right above the stub out..i always offset..if there's a nice big window above then i can see it.

he finally cleaned and repaired the pipes so i wont have to thanks man

Had to shout the new tool out!!!!!

Studor vents make a job easier. Not gonna lie, as an engineer sometimes the architect fails to take vent piping into account. I really don’t see how since it’s an integral part of a very important system. You don’t want that nasty water going where it’s not supposed to and you want it to go where it is supposed to. Those things have saved my bacon more than once. 👍

Before I work on the kitchen sink again, I am taking out the piece between the cabinet doors, and fixing it so it can be removed and installed. Thinking dowels at the bottom and a bolt latch at the top. One side of the cabinet is the same width as my ribcage.

This is a first for me. I never thought there was such a thing.

The M-18 oscillating tool. When you want the same power as an M-12, but a big battery pack that frequently gets in your way.

Vents don’t make water drain! Vents protect the trap .

the 1st time someone does this correct . good job

"I bet you can't see behind walls"? *her her derrr*

i love my milwaukee multi tool..i got a milwaukee drimmel too and i use it all the time.

Worked 40 years, lol, probably has a built-in vent downstream. Our house has a tall vent just as multiple drains connected together comes thru outside wall.

I love my osillating tool also. Works for so many problems cases.

They have tubular trap kits with the mechanical vent in them now. You could have avoided opening that wall up.

In England we have 1 vent on the 110mm soil pipe. And that’s it

As far as I know, Air admittance valves are only legal in states that have adopted the I.P.C. States that still use the U.P.C. this type of valve probably is not legal. Also, probably thats a trap arm from the left, where there might be waste and vent stack.

No vent? Provent 😎✌️💯

That is a trap arm coming across, The vent would be coming off of the t two feet from where you opened up the wall.

That there is from Oatly 😅

I always check the roof vents and make sure they aren't clogged up. I've seen squirrels get up on the roof from near by trees and drop acorns down the vent pipe and they sprouted causing a blockage, apparently inside a vent pipe is a florishing environment for them. It was pretty crazy.

Studer vents work great

Good job. Smart thinking

You’ll be back to replace that previously leaking basket strainer. Good job in “taking care of the customer”. Lmao

Obstructed the sprayer hose.

You could of use a socket saver instead of cutting that wall

Unless water is flowing into a closed system ie. An unvented crock. A vent will make no difference on how the drain drains unless it is partially clogged but then an air admittance valve wont correct either problem. Because an AAV wont allow air to escape. Anyway clean the drain unless the trap is getting siphoned down then the AAV will help.

Off trade subject but that oscillating tool is so interesting to me, one of my guys got one after seeing my dewalt and i gotta say it feels pretty awkward using it as it cannot stand lol. Other than that it works just as fine as mine, just find it a little odd that my only option when not using it is to lay it on its side. Anyway thanks for reading 👍

The air admittance valve wouldn't drain water out, that's the whole purpose

How do you know there is no vent? You are looking in the wrong place. Why the offset? You are a terrible plumber!

You don’t know it doesn’t have a vent! It could be on that horizontal drain up to 32” away according to code, where as that vent you’re installing is not code at all

In Plumbing, the purpose of a vent is to keep the water from being siphoned out of the trap. If all the water is siphoned out of the trap that would allow sewer fumes to rise up out of the plumbing system and make your whole house, office or whatever …… stink. 🤢

Well... It might have a vent .. the tee could be over to the side to vent around the window infront of the sink... Also always use LS 90s

If you explained what issue they were having beforehand guarantee I could have. Also did you put a camera into the pipe to make sure that's not just an arm off a stack because there's a high chance that's what it is.

Okay so is it not possible that in that wall that horizontal is teed into a vertical that vents up and drains down?

You only need a vent for a sewage/waste pipe which would in all likelihood extend off a T or Y from your main stack up to the roof. In most cases all sinks, toilets and bathtubs run into that stack so all of them will vent from the main.

Studor vents have a check valve in them for liquid made to break vacuum

He don't know what a trap arm is

Ah, breaking out the vibromatic.

Ok. I raise you I guarantee you will not be able to see what is wrong with my next door neighbor's car with the hood shut and the garage door closed.

Theres probably a TY at the end of the trap arm further down the wall to the left

According to the IPC 2018 a 1 1/2" trap can tie into a horizontal waste arm pitched at 1/4" per foot and does not have to be vented until 6'. 5' for 1 1/4" traps. IPC 2018 Section 909.1, Table 909.1

snake + camera = good plumber

I want some Foldgers now.

Are sure it didn't have a vent or did it have a dirty arm. That means part of the trap are is concealed in the wall😊

That being PVC I bet it had a tee in the wall for the vent.

if the mechanical vent is working properly ( hence the rubber diaphragm hasn’t dry rotted) , it would prevent flooding over if installed under the sinks flood plain , as it’s a check valve design .. But i’m with you a 100% , better to be safe than sorry 👍

The most important thing is vent must be above the water level sitting on the sink

How is that above the flood level, that doesn’t look above the sink to me

I guessed there was a turtle in it, any one else betting on the turtle?

I know what's wrong with it, it aint got no gas in it.

YES YES you said it im arguing on this other short needs to be above flood rim , how do you define flood rim? code defines it 4" above basket strainer, these people saying flood rim is above sink

American plumbing is a horror movie!