check valve

Issue: Hot tub is above pool, and empties into the pool. When the pump turns off, the water level of the hot tub is falling to the height of the jets. Problem: I've seen many posts here describing the same issue, and a faulty check valve is always mentioned. Help / Question: Where is the...

My salt water pool has five Pentair check valves and one Jandy check valve. The pool is 14 years old. The Jandy valve has never been replaced and looks and works fine. The Pentair valve flappers only seem to last about three years. And cost like $75 - $130 each, and I need five each time...

Hi there, Long time reader but first time poster. Sorry for the long preamble, question is at the end… We just had our 20’ x 40’ in-ground vinyl liner pool refurbished by (what I thought was) one of the more reputable companies in our area (Ottawa Ontario Canada). New liner, new lines, new...

My new 18000 gallon in ground pool was installed with a Pentair 400k heater. A Pentair “positive seal non corrosive Check Valve” was not installed per the installation manual recommendation. Instead a rather short “Hartford Loop” was installed. I understand it’s important to not let water...

Suggestions to eliminate acid check-valve plugging? Have a Pentair IntelliPH acid dispenser with a tank-mounted Stenner pump. The Pentair 522513Z check valve plugs once a year with what looks like fine black plastic shavings. I see a very small amount of black debris in the acid tank, but...

Hello to all. Looking for some help. Had recent repair of broken return pipe to spa under deck. Repair (seems) fine. No longer loosing water from pool/spa. However, spa will not hold water when pump turned off, pretty rapidly leveling out with pool. Happened a few years back, and a quick...

I am about to purchase a Jandy JXI400n with Versaflow and a Serviceable Zinc Anode to use with my installed pool equipment. The system uses a salt/chlorination generator. The installer suggests that the Anode negates the need for a check valve to be installed after the heater. Any thoughts...

I have a Rainbow 320 in-line chlorinator. It already has a check valve incorporated in the bottom of it. Pool guy told me today I should have another check valve installed in the plumbing line between the chlorinator and heater to ensure chemicals do not flow into heater. After thinking about...

Howdy! In ground pool with attached spa, at least ten years old, installed by previous homeowners... The attached spa was dropping to the level of the pool water every time the pump shut off and I was "intermittently" losing water from the pool when the pump was running. I looked at the check...