There are no valves, skimmer/main line drain comes out of the ground and straight into the pump.mas985 said:Any change in your valves settings can have an effect. For example, with or without: solar, cleaner, spa, etc. The draw rate from the tank will be dependent on the number of buttons but also the pump suction.
What is the height of the tank relative to water line?
Tank is around 6-12 inches above the water line.