I've notice the water level in my pool has been dropping rapidly lately. At first I thought it was evaporation due to the temps spiking into the mid 90's so i did the bucket test and it does not appear to be evaporation.

I've determined the water drops when the pump is running so this leads me to a leak in the system, not the pool it's self.

I'm curious, do back wash valves have a tendency to go bad? I'm going to pull mine and inspect the o-rings.