ProxyBox
Member
Hi,
I noticed a check valve installed on my old circulating pump for the water heater. I'm curious why this is necessary? I'm also interested in knowing for what other uses check valves are necessary.
Thanks. I appreciate the info.
I noticed a check valve installed on my old circulating pump for the water heater. I'm curious why this is necessary? I'm also interested in knowing for what other uses check valves are necessary.
Thanks. I appreciate the info.