My main drain is a 32" long skinny oval and inside it has a spot for a hydrostatic relief valve. Fom this spot there is a pipe going down below where the gunite shell will end up, into a hollowed out area filled with gravel. I assumed the hole inside the drain would be plugged with a relief valve, that would let water in, while preventing water from flowing out, and they do make a part for this. However, the plumber is just planning on using a regular PVC plug to close the hole and he says we would manually remove it if we ever wanted to drain the pool, and this will let water in at that time.
My question is, should I track down a relief valve and use that instead of his PVC plug, or do you think I am fine without it? I've heard of relief valves leaking, and I'd hate to be introducing an unnecessary problem if there isn't a good enough reason in my situation.
When they dug the pool, at the beginning of day 3 we found a little bit of water at the bottom, but that is gone now. The hole is about 10' deep. We've had rain this year, but not anything like last spring, and it's a repeat of last year's rain that makes me concerned. Remember I am on all rock, if that makes a difference. Any help deciding what to use would be appreciated. Thanks!
Glad someone was able to help.
