I felt that the water pump took too long to cut off after running water, several seconds at least. I could tell that there was air trapped somewhere I just couldn't find it.
So today, I found it. It suddenly hit me that it has clothes washer connections in the bedroom closet, I went and checked them, the lines were full of air. Purged them out, now the pump runs a couple of seconds and shuts off.
Learn something every day!
Now-2014 Sierra 346RETS 5er BUB
Then-2002 Keystone Springdale 286RLDS TT
Nights camped in 2014-28, 2015-127, 2016-10