RV Water Pump Check Valve Function and Replacement How-to - Shurflo 4008

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In this video, I disassemble a Shurflo 4008 water pump to show where the check valve is located and how to replace it if damaged. The primary function of the check valve is to stop the back feeding of water when hooked to city water from filling up and overflowing the fresh water tank.
The check valve sometimes becomes stuck open if debris is lodged in it or hard water leaves mineral deposit buildup. Another possibility is damage from water left in the pump over winter, and a hard freeze occurs. There are also rubber O-rings that can wear out.
Check valve kits are usually available for most pumps and are relatively inexpensive and easy to change. Much cheaper than replacing the whole pump.
Link to More LYRV Plumbing Related Videos - www.loveyourrv.com/tag/plumbing/
New Pump and Accumulator Tank Installation Videos - www.loveyourrv.com/installing...
Parts Mentioned:
Shurflow 4008 Check Valve - amzn.to/3EYFw5W
Shurflow Pressure Switch - amzn.to/3SlucUC
Inline Check Valve - amzn.to/3SlZn1Z
Shurflo 4008 Water Pump - amzn.to/3TFRmWB
Shurflow Accumulator Tank - amzn.to/3VMe3Ky
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Опубликовано:

24 июл 2024

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Комментарии : 51

@LoveYourRV Год назад

*Link to More LYRV Plumbing Related Videos* - www.loveyourrv.com/tag/plumbing/ New Pump and Accumulator Tank Installation Videos - www.loveyourrv.com/installing-new-rv-water-pump-usa-adventure-gear-5300/

@cdix3227 Год назад

I had my pumps check valve do the same thing in my 3 month old trailer. Warranty replaced it. It happened again on the new pump but intermittently. So I installed an inline check valve.

@Rick-iv9nw 10 месяцев назад

Nicely done. No BS, no attempts to be funny, good close ups, and very informative. Thank you.

@LoveYourRV 10 месяцев назад

Glad it was helpful! Cheers, Ray

@herb7877 Год назад

Very timely for me; THANK YOU. I replaced my whole pump while in the Desert this last Winter and thought I'd fix the old one when I got home. Also have a spare & wire up a jumper to pump out my extra water I take with us. Forgot about it until I saw your posting. I guess I know what I'll be doing soon.

@alive-awake 11 месяцев назад

You went way over my head here Ray.😅 I know a lot of people will benefit from this though.

@r8edrv4fun65 Год назад

I'm hoping this is my issue. Thank you for this video!!!

@user-zh6xy8kw4g 6 месяцев назад

BIG Thank you, video well done you just save me 86 dollars for a new pump, solved two issues so I owe you lunch. Well done !!

@LoveYourRV 6 месяцев назад

You're welcome!

@TastingTheHeat Год назад

Thank you. I really needed this video. I pulled my pump apart and stretched out the spring just a little to put more tension on the valve. Works fine now. Thank you again. Very informative.

@projet2907 Год назад

Thank you Ray. Super vidéo, so many RV’ers have this recurring problem. I bought an in-line check valve but have not gotten around to install it yet. I let the pump resolve itself when I take the road and use it. It clears up and the check valve does it’s job but then it starts again. Especially if I let the reservoir go real low, it can catch some debris. I find it does not take much for that little check valve to let water in. I use to just open the pump and clean it up couple times a year. I flush the fresh tank every year for clean up.

@ericcowan7759 Год назад

Ray, thanks for this great maintenance tip, I appreciate you taking the time to point these out, yet I wish I could actually get to my pump, as it's buried underneath my sink, without any good access. Either the water heater or the sink will have to come out, neither is desirable. I can see the pump thru a cabinet, under the sink, but there's no chance I'd ever get in there to remove it as I had attempted to access my slide control and just about got my upper body stuck inside; quite some anxious moments! Hopefully, I won't have an issue. Keep these coming! Thanks again!

@PentaxLife Год назад

Nicely done right I might have to replace my Pressure switch Soon

@bertkelly7650 Год назад

Thanks Ray!

@wesleyenglish5431 Год назад

This was a really helpful and well done video. Thank you.

@LoveYourRV Год назад

You're very welcome!

@KevinCoop1 Год назад

Thanks! Always good to learn! Kevin

@tudyk21 9 месяцев назад

I had the check valve push past the seat because my water pressure was too high, and got the same effect. The freshwater tank would fill an overflow.

@danielwagoner Год назад

Thanks for the info. Great video

@KU9L Год назад

I think an in-line check-valve is a very good idea. After a whole summer of Camp Hosting in the mountains of Colorado with high mineral levels in the local water supply, the check valves all seem to become leaky. It can be quick surprising to get down to FL in the winter to discover a full tank of fresh water even though we hadn't quite gotten around to filling it yet. We do try to keep a full tank of water at all times as arriving snowbirds love to break off water lines upon arrival to the campsites in the winter, lol. I have conducted many emergency repairs in the middle of the night when we were RV Park campground managers there, LOL. The extra check-valves idea just makes sense just for the PIA effect. I replace our water pump every 3-5 years typically because they are usually worn out and I rebuild them, but sometimes just adding the extra check-valve buys some time before the next repair. Often I am 100 miles from the nearest RV Parts supplier or dealer so an extra pump is always in my storage bay. -David & Sheila Knapp

@ryanzaragoza2789 Год назад

Did the check valve failing also make the pump loose pressure and re pressure the line almost like there is a leak

@coreybabcock2023 Год назад

I have a brass inline check valve someone gave me IDK what to do with it

@jeffslater3708 Год назад

Good info! Thanks

@Glockners985 4 месяца назад

Great video helped me fix mine, thanks very much.

@LoveYourRV 4 месяца назад

Great to hear!

@coreybabcock2023 Год назад

I have my surflow 4008 as a spare in my van too but may put it back in service and keep the seaflow as a backup IDK yet

@keebler32ify 11 месяцев назад

My Guy! Thanks Bro 😎

@coreybabcock2023 Год назад

Pressure should be 9 9 1/2 turns clockwise and bypass around 11 12 turns clockwise

@k-mparker Год назад

Adding a water softener will help mitigate potential problems to the water pump from hard water. Just my 2 cents.

@LoveYourRV Год назад

Thanks for the tip. Running some vinegar into once in a while and letting it sit for a bit should help too. I do that at the same time I do my water heater. www.loveyourrv.com/cleaning-rv-water-heater-tank-vinegar/ Cheers, Ray

@timf6916 Год назад

Nice

@user-wg5ny8qb6q 7 месяцев назад

Great video! Informative and inadvertanly funny. The Pump head assembly is mountable upside-down? Thats what I noticed from the final assembly.

@LoveYourRV 7 месяцев назад

Seemed to mount and tighten up no problem. But its a spare pump so haven't tried it to see if it works that way. I wonder if maybe it can do that so the flow can be switched to account for different pipe orientation.

@user-wg5ny8qb6q 7 месяцев назад

@@LoveYourRV I wonder myself because the older pumps plumb out in the opposite direction making replacement a bigger project.

@davidfortier2720 18 часов назад

I would be nice if we could see what your doing

@LoveYourRV 17 часов назад

Sorry, tried my best.

@ZenAFTrailtales Год назад

Can you just take off the pressure switch to change the check valve? Pretty sure my o rings are needing replaced or the spring cleaned. The strainer was clean when I checked a couple months ago.

@LoveYourRV Год назад

Should be able to, if not its pretty easy to take apart and reassemble the rest of the pump.

@drs3055 Год назад

Even though water pump is working fine, is it a good idea to add an external in-line check valve as an added and inexpensive aid taking the constant pressure off the pump when connected to city water? If so, how far from pump should in-line check valve be? What is a preferred in-line check valve (brand and size)? Thanks much!

@LoveYourRV Год назад

If you're RV uses PEX pipe, the easiest install would be a SharkBite check valve amzn.to/3FIb0Nx I'd put in close to the output line of the water pump. The drawback to the extra check valve is adding another thing in the plumbing to maybe clog or leak. Cheers, Ray

@user-qf3ey7mr6m Год назад

Hi is there a way to fix this if one of the metal tabs break off where the wire connects to the pump? My pressure kept slowing down off and on and when I touched the wire it would work good but when I took the female connector off the metal tab, it bent and cracked off

@LoveYourRV Год назад

Not sure, might be able to repair with solder but it maybe to tightly molded into the plastic to get access or melt the plastic.

@CJGame-N-Play 2 месяца назад

Recently hooked up to city water line to flush tanks, after flushing, closed all the faucets and went to make a sandwich . Came back out to a tub over flowing with gray water. Remind you. No running water in the camper. Just left the main city line on. I see some random people on the internet have experienced this same thing. Thoughts? Could this valve be the issue? Pump was not turned on by the way.

@LoveYourRV 2 месяца назад

No, if pump is bad it would fill the fresh tank not grey. Some how water was filling the gray tank, which is weird. Maybe there is some built in tank flush system in your RV and city water was filling it. Many RVs have black tank flush systems but to have it on the gray is a little strange.

@avalizascom 5 месяцев назад

Sir, thank you for the video. I have a question. I left my pump near a stream and forgot it. Then bc of the rain I was taken into the stream and submerged under water. I took out. And then it was not functioning anymore. I took off the diafragma, to let it dry. Also I took of the check valve to let it dry in the sun. Any suggestion what else to do? I also see two wires connected to the motor. Should I open the back as well to let it dry?

@LoveYourRV 5 месяцев назад

Yes, I'd take it apart as much as you can, dry it out, and inspect it for damage. I doubt the motor is waterproof to a submersible level.

@avalizascom 5 месяцев назад

@@LoveYourRV thank you for your quick reply. I took it all apart with the help of the following video. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-NkcuXefnofc.htmlfeature=shared

@Mac-bn Год назад

My watertank is full of water. Problem 1. The pump keep on running, I have check there is no leak in all the pipe and there is no water tap is ON. If i closed the valve, pump it will stop? If i open the valve it keeps running? Pump should stop when any of the house tap is not in use but it still keep on running, what should i do? Problem 2. Pump stop running, unless I press the reset button to start or I off the power and ON again waterpump will works, If no water tap is open within 1 hour, pump will not work i have to reset the preassure controler to start the pump again? what went wrong , please advice? thanks

@Intwodeep902 Год назад

Link to the water inlet screen protector filter screen?

@LoveYourRV Год назад

SHURFLO RV Trailer Pump Filter Fresh Water Pump Strainer amzn.to/3Vof9uQ

@NackDSP Год назад

That is a very poorly designed pump as they seem to fail regularly. My pump failed after just three years and very little use. I installed a new pump and rebuilt the old one that I keep as a spare. It is a real bummer to drive for many hours, get a great camping spot and then have your pump fail. Carry a spare.