Goulds pump losing prime

Users who are viewing this thread

mrogge

New Member
Messages
6
Reaction score
0
Points
1
Location
Florida
Hi. I've got a brand new goulds 1.5 drawing from a lake. Everything is new except for the pipe between the pump and the lake. There's a spring loaded check valve in the lake near the strainer. I also pressure tested the auction line and it seemed to hold at least for the short term. Heading back in a few hours to see if it held overnight.

I can prime the system by throttling the spigot after the pump. After priming the pump and all zones work great. But by the next day the prime is already gone.

I suspect a bad check valve..... though since it was holding the back pressure I'm not sure anymore. ***unless the check valve is faulty whereas the back pressure isn't enough to make a proper seal??
 

Valveman

Cary Austin
Staff member
Messages
14,496
Reaction score
1,277
Points
113
Location
Lubbock, Texas
Website
cyclestopvalves.com
A foot valve or check valve can only cause a loss of prime when the pump is off. If the pump is running all day and not shutting off as it should, the loss of prime is most likely a suction leak or a high spot in the suction line. But if it runs all day and loses prime overnight, it is most likely the foot valve. Plastic check/foot valves suck, because they don't check. Lol!
 

mrogge

New Member
Messages
6
Reaction score
0
Points
1
Location
Florida
I isolated and pressurized the auction line to 50psi. After 16 hours it was still at 30psi. There's no high spot on the line. It's a slope of about 8ft over 100.
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks