We are just back from a weekend in our 2016 170C. I found water leaking at the holding tank drain, over the black water tank. The AC condensate was dripping from the other side ruling that out.
It is a shore water leak. I shut off the water and the leak ceased. The pump didn't cause a leak, which I thought a bit odd.
When we got home I broke out the inspection camera but could not see a source. I did not see any water system tubing over the black water tank either. It is dry inside above the floor.
What water lines would run above the black water tank? What does it take to drop the tank? Is the toilet and vent hard piped to the tank or is it (hopefully) a slip fitting through a seal? Has anyone here dropped their BW tank?
Thanks for the links. I'd seen them but not yet saved.
I looked a bit more after work today. I did not check the tank fill yesterday. It worked without leaking, as I was pretty much expecting. I rechecked for a leak using the pump, none seen. When I switched back to shore water I heard a slight "pop" and got lots of water.
Turns out the Alde inlet pressure relief valve had opened when the city water hit it. Closing off the valve and installing the pressure regulator I normally use and it did not leak. I wonder if the valve was acting up or had a bit of debris allowing it to leak.
At this point I think I'll hold off doing anything until the next trip. If it leaks I'll top up the tank and use the pump. If not I worried the problem to a repair.