PortlandBill
New Member
The submersible pump in my rainwater cistern cycles every 12 minutes; 58-to-38 PSI 10 mins, 38-to-58 PSI 2 mins. It's either the check valve immediately above the submersible pump (95% likely) or the union above that (unlikely as there's no sign of water dripping or spurting out.) All other possible reasons for water leaking out have been eliminated.
First question: this is not normal, right? I'm assuming a good check valve will hold 58 PSI pressure much longer than 10 minutes.
Secondly, what kind of check valve should I use? I'm using a brass swing check valve. It was new and the flapper gate looked fine when installed. Would I be better using a spring-loaded valve? I'm more interested in a long long service life than a small drop in pump power.
Background info. The pump is a Grundfos 16S05-5 with FE Motor. Tank depth ~6 feet. I"m using a cycle stop valve.
First question: this is not normal, right? I'm assuming a good check valve will hold 58 PSI pressure much longer than 10 minutes.
Secondly, what kind of check valve should I use? I'm using a brass swing check valve. It was new and the flapper gate looked fine when installed. Would I be better using a spring-loaded valve? I'm more interested in a long long service life than a small drop in pump power.
Background info. The pump is a Grundfos 16S05-5 with FE Motor. Tank depth ~6 feet. I"m using a cycle stop valve.