I had to put several chemicals in and set multiport valve on top of sand filter to recirculating. When I came back home (4 hours later), I noticed there was some water by the filteration system. I lost about 4 inches of water. I had my valve set to main drain.
My question is...why did I lose water or have a leak when my valve is on multiport is on recirculate? My pool does not leak when the system is off. Also, why is it leaking by my filteration system by my waste line (pipe that backwashing water leaves the sand filter)
My multiport valve looks like it had a leak last year (water was standing in my multiport vlave-not over flowing). I tried to replace the spider gasket but with this model I have to replace the whole multiport ($125-$150).
Do you think this is the problem or do I need to call a leak company?