Pump loosing prime

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Martinmeilinger00

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Hello Everyone,

I have a 20ft deep with 2" casing well and inside that I have driven a 1-1/4" pipe with a 4ft sand point on the bottom that is 3 ft over the end of the 2" casing so, I have a total of 23ft pipe for the pump down the ground. On the surface I have installed a Tee socket on which vertically there's a service port cap and horizontally there's a check valve on it that connects to the pump. Unfortunately my pump just wont hold prime and I ran out of ideas what could be wrong with it. I checked all the connections on the inlet pipe as well as the outlet if its leaking but nothing appears to be, everything looks fine. Could it be that I need to change the pvc to a brass check valve? I purchased everything new a week ago so it can't be the fact that its too old. I will attach images of my setup. Let me know if you have some ideas why I'm loosing prime.
Thank You!
 

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Valveman

Cary Austin
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Plastic check valves are no good. But I see several threaded joints on the suction that could have air leaks. The cap on top of the well is probably the worst. It is hard to prime a point well. The prime needs to be on the pump, not the well. If you have the smallest of leaks in the suction pipe you will never get the well to draw.
 

Martinmeilinger00

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Thank You for your reply Valveman!
I went ahead and changed the plastic to brass check valve and as well as I resealed all the threads with teflon tape to make sure there are absolutely no leaks. I checked the pressure gauge when pump turned off and let it sit for a night and the pressure stayed the same (45 psi) the next morning. Then I went ahead and turned the pump on and it was working all fine, it didn't loose any prime, so the brass check valve definitely helped. Thanks for your advice!
 

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