I have a National RV---I had a problem for over a year, where the fresh water would leak, when the tank got filled---It would just drip, constantly. I stopped at the MFg Plant for a repair, it lasted one night--until tank got filled--went back the nex week, and the tried to find a Ball valve that wouldn't leak--Four later, I was on my way. Two night later, in Las Vegas, the tank started to overflow again---Drip--Drip-Drip-.
I called, got a incidence report and made an appointment in Lakeland , FL--3300 miles away. They found it was the Water Pump!!- There was a Valve that was bad--They replaced the Water Pump and the problem disappeared.
04 SeaBreese LX 8341 / Workhorse W-22 / GM 8.1 / Allison 5 Speed / Brazel's ULTRAPOWER Upgrade/Taylor Extreme Service PlusCables/DIYCAI
06 Honda CRV4/SE/all wheel drive with Falcon II / Roadmaster 9000 Braking System