I have a suction-side airleak that I can't find. I know it's not the joint between my basket and my first valve (I can isolate those sections and pull from my spa and it's okay) and I've tried all the tricks to find it, including checking/replacing all of the gaskets in the valves. What's confusing is that the pump will hold it's prime overnight. My pad is perfectly dry and I sealed all of the accessible joints with silicon just in case, but I'm still getting air.
The big question: why is my pump holding it's prime when I know for sure there is an air leak? Does that indicate if perhaps the leak is underground, or maybe it's a crack in a pipe as oppossed to a break in a joint?