So we're camping and I notice the pump is cycling occasionally. I check around and see some dropping from the anode rid. No big deal, I'll tighten it when I get home. The next day, the pump starts running, and doesn't shut off. It sounds like it wasn't priming.You know how it gets deeper when it's moving water. I shut the pump off and,I didn't check, but just filled the water tank. Turn the pump on, things seem fine. The next day, the pump starts running. Same noise, not getting deeper. It must have run 5 minutes before I caught it. (I was doing things around the site, but not near the camper). I shut the pump off, and only start turning it in when I want to use it. So. I'm faced with two thoughts. The pump (16 years old) is going bad There if a leak I didn't see any dripping water, and the sound changes make me think the pump. So before I spend $75 on a new pump, any way to diagnose this further?