this afternoon we noticed that the concrete around our sand filter was wet and it looks like the leak originates at one of the connections to the pump:
Any tips on further DIY diagnosis? Is it feasible to attempt a DIY fix when, as hubby says, "I don't have a wrench nearly the right size"?
For reference - this is a bigger-picture view of our system. Hubby emptied the pump basket and re-primed the system so not all the water on the concrete is a result of the leak - original leak zone extended roughly 4-8 inches beyond the base of the filter