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Old 02-19-2022, 09:29 AM   #1
rickbecker
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M.O.C. #13543
water valve nomenclature??

2013 3150RL - I have water getting by the valve that lets you select between your city water hose connection to the RV. Normal position applies pressure to the trailer and Fill position routes water to the fresh water tank. Over time with the valve in the Normal position to go to the trailer, water will start coming out of the fresh water overflow. As the valve is not working correctly I would like to replace it.


Can someone help with the correct nomenclature for the valve so I can search??
 
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Old 02-19-2022, 09:40 AM   #2
Carl n Susan
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I would not jump to the conclusion it is the valve (whatever the proper name is). Much more likely is the check valve in the water pump is leaking and allowing shore supplied water to back flow into the fresh water tank.
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Old 02-19-2022, 09:48 AM   #3
rickbecker
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Thank you for that! Had not entered my thought process and much easier to check than changing that valve!


I will post what I find.

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Old 02-19-2022, 11:11 AM   #4
AZ Traveler
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Rick,

I have changed 2 water pumps for the same issue. Fairly easy task.
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Old 02-19-2022, 04:34 PM   #5
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If your pump still works, a cheaper and possibly easier fix would be install a check valve in the pump pressure side line. This will not affect the performance of the pump and will permanently fix the issue. I made this fix years ago while at the rally at Seven Feathers in 2014. Originally, I had installed the check valve on the suction side of the pump, where the white coupling is behind to the left of where the brass check valve is in the photo. I discovered the suction side fittings can not handle the pressure and I had a water leak at the pump. I replaced the original check valve with the coupling and installed a new check valve in the pressure side line and have had no issues with the tank filling past the internal check valve of the pump. All the new fittings are shark bite type fittings.
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Old 02-19-2022, 05:40 PM   #6
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Before doing anything, check on all the screws on your water pump, especially the 4 long screws holding on the pump propeller assembly. I had a similar problem with a previous trailer and discovered that 2 of the screws (bolts) were completely missing, the 3rd one was barely hanging on and the 4th one was far from snug tight. I found 1 of the missing bolts laying on the floor and the 4th one I never found. I think it fell out and dropped through the floor where the hoses came up through the floor.

I ended up buying a new pump, identical to the original, except a newer version and never had a problem with back flow again. I still have that old pump, but it's still missing a screw. It works fine, and maybe someday I'll figure out something I can use it for that's not installed into something permanet. I'll never trust it to not leak now.

Anyway, check on the bolts and screws on yours before doing anything. It's possible one or more is just loose letting water back flow past the seals. That's the FIRST thing to check. If all is well there, then consider the check valves.
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Old 05-20-2022, 11:15 AM   #7
rickbecker
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Water pump reccomendation

Looking like I need to replace the water pump. Using this one -
Flojet R4426143A-12V VFLO 5.0 Constant Flow Water Pressure Pump - 5.0 GPM, 12VDC at the moment and still available from Amazon for $240. I like the pump (when it works!) and will probably get another unless one of you fine folks has newer / better etc. recommendation.

Any advice is appreciated!

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