When I opened my pool and started the pump I realized (about 10-15min later) that I forgot to unplug returns. 2 out of 3 returns plugs were rubber (1 return and vac) and they just shot out. I've been running pool for a couple week now, don't see any issues other then - my pressure used to be 10 now 20 and I think the return jets used to be a bit stronger than they are today.
Cleaned cartridges again, replaced gauge. no changes.
What could be wrong?
Can 7yr old cartridges be the reason? Should I try to run it without cartridges to see if it goes back to 10?
Could something inside the heater get damaged by increased pressure?I don't use it to heat the water, but it's connected.
I believe this type of problem is the problem only on the return side and not the suction side. Correct?