We put in a heater a few years ago, and have a reoccurring issue with the check valve - which is connected on the return line from the heater - causing a leak and/or bursting leaking water everywhere. The first time it happened was at the very end of the season last year, and again this year at the end of the summer. We opened the pool in May and ran for ~4 months with no issue. Kind of strange. Both times it resulted in that return line plumbing getting very hot coming out of the heater. We just replaced the liner this spring and added an additional return straight from the heater to help alleviate any bottlenecks flowing back into the pool.
I'm thinking it might be related to the backpressure issue I've been having lately, when I shut off the pump it releases a ton of pressure/water back through the suction side/skimmer. Not sure what is causing it, might be a slight leak in the basket gasket but it looks solid. The check valve itself is a cheap 1.5" PVC spring check style you can get from big box stores, I'm wondering if the back pressure is somehow too much for it and making it come apart at the seams. It's threaded in the middle, and after it gets ruined I can twist it but it slips and never gets fully tight. I try and backwash regularly, doesn't seem to matter regarding the back pressure.
I guess my question is, has anyone had a similar experience with check valves getting ruined? I'm thinking I should get a proper swing-style check valve to replace (better GPM flow), and should probably put another one on the suction line in front of the basket, but I'm a little concerned with where that back pressure will go (filter?) if not allowed to release into the skimmer. Also considered just removing the check valve entirely from the return line on the heater - but sounds like might not be a good idea.
I know a diagram would help here, hoping to update but posting from work atm.
10k gallon pool
sand filter
vinyl liner
Jacuzzi 266k BTU heater
Hayward 1.5hp pump
I'm thinking it might be related to the backpressure issue I've been having lately, when I shut off the pump it releases a ton of pressure/water back through the suction side/skimmer. Not sure what is causing it, might be a slight leak in the basket gasket but it looks solid. The check valve itself is a cheap 1.5" PVC spring check style you can get from big box stores, I'm wondering if the back pressure is somehow too much for it and making it come apart at the seams. It's threaded in the middle, and after it gets ruined I can twist it but it slips and never gets fully tight. I try and backwash regularly, doesn't seem to matter regarding the back pressure.
I guess my question is, has anyone had a similar experience with check valves getting ruined? I'm thinking I should get a proper swing-style check valve to replace (better GPM flow), and should probably put another one on the suction line in front of the basket, but I'm a little concerned with where that back pressure will go (filter?) if not allowed to release into the skimmer. Also considered just removing the check valve entirely from the return line on the heater - but sounds like might not be a good idea.
I know a diagram would help here, hoping to update but posting from work atm.
10k gallon pool
sand filter
vinyl liner
Jacuzzi 266k BTU heater
Hayward 1.5hp pump