Blasted timers and forgetfullness. Have my pump on a timer. One day I got up and looked out the window and water was flowing down the driveway. Pump sucking air. Day before was working on the filter and disconnected the hose joint at the filter output. Forgot to disable the timer. Next morning timer kicked in. Water all over the poolhouse. Luckily it missed the generator and electrical panel. Gee...water comes out of a 1.5" pipe real fast.
Bah !! Last time I did that.
Al