Water pump check valve source

[The Colonel]

I want to put a check valve inline with my wp on the output side. Looked at Amazon but everything with f-m connections is in wrong direction. I know I can use a m-m and put a coupling from pump out to cv but wanted to eliminate extra leak point. Does anyone know of a source, that’s reasonable to get a f-m cv with f-m flow direction? Tired of leaking internal cv in pump.

[wulfraat]

Is the check valve that’s built into your surflow pump not working?

[The Colonel]

Originally Posted by wulfraat

Is the check valve that’s built into your surflow pump not working?

It leaks often. First time I removed pump and disassembled head, cleaned everything-there was no obvious debris, just some light tarnish-like stain that I cleaned with paper towel. Put it back and all worked fine. A week or so later it filled fw tank again. I ran pump for ten minutes with cw off and it cleared. It’s done it again, hence the interest in installing a separate cv. I use a water filter from cv faucet so not sure what else to do besides chg the pump. Btw the pump is the shurflo a65 that some rave about. Mine is loud but diff topic

[wulfraat]

I see. I’d just change the pump. They are not that robust. I actually keep a spare with me as several that I’ve owned have failed. They are about $100 bucks.

Could be tricky to insert a secondary check valve the way airstream plumb the connections to the pump....

[tbashin]

I put a valve after the pump. I close it when on city water.

[hddeering]

I installed a half inch brass swing check vale on the vertical supply line to the pump.

[cazual6]

Originally Posted by The Colonel

I want to put a check valve inline with my wp on the output side. Looked at Amazon but everything with f-m connections is in wrong direction. I know I can use a m-m and put a coupling from pump out to cv but wanted to eliminate extra leak point. Does anyone know of a source, that’s reasonable to get a f-m cv with f-m flow direction? Tired of leaking internal cv in pump.

I put my check valve between fresh water tank and the pump instead.

I used this
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

You can also see it in my FB group located at the bottom of my signature.

[uncle_bob]

Hi

There should be no difference between putting the valve in front of the pump vs putting it after the pump. If the fittings do not work "after" they should be fine for a valve installed "before". All this assumes the issue is with water *through* the pump. If water leaks out of the pump its self, replace the pump.

Bob

[The Colonel]

Originally Posted by uncle_bob

Hi

There should be no difference between putting the valve in front of the pump vs putting it after the pump. If the fittings do not work "after" they should be fine for a valve installed "before". All this assumes the issue is with water *through* the pump. If water leaks out of the pump its self, replace the pump.

Bob

Kinda, but I’d want it after pump to keep force to open on pressure side of pump to not reduce suction. FWIW

[uncle_bob]

Originally Posted by The Colonel

Kinda, but I’d want it after pump to keep force to open on pressure side of pump to not reduce suction. FWIW

Hi

Over the range of pressures that are likely to happen, the delta across the pump would be the same either way and it should work ok.

Bob

[Bill M.]

I think the check valve should go on the pressure side of the pump, where you want it to. An extra well connected fitting is not going to leak. There are lots of fittings in a trailer anyway. So get what configuration you can and install it.