I have water leaking from behind the seal plate of my pool pump, under the motor. Exactly like a bad shaft seal. However...
I replaced the shaft seal. Still leaking.
I replaced it again, thinking I might have accidentally touched it or got some dirt on it. Still leaking.
I called a "pro", who also replaced the shaft seal. Still leaking. He then suggested rebuilding the MOTOR, which makes no sense to me. The problem is that water shouldn't be getting to the motor in the first place. How could rebuilding the motor be a possible solution?
At this point, the leak has increased from an occasional drop to more of a visible flow. I'm hesitant to run the pump at all now.
I replaced the seal plate, thinking maybe there was a small crack. Still leaking.
I replaced the impeller, again thinking maybe there is a crack. Still leaking.
As far as I can tell, that pretty much exhausts the list of relevant parts that could be replaced. I also replaced the impeller screw and gasket, but I don't think that would be related to the leak.
I'm pretty sure (say 99%) the water is not coming from somewhere else and running down under the motor, but at this point I'm not going to reject anything out of hand. I can post a picture of the leak if that would be helpful.
What else can I do? Is it possible the repair guy was onto something with rebuilding the motor?
This is a Pentair Whisperflo pump.