mjc
Retired Neighbor
- Joined
- Jan 3, 2008
- Messages
- 12,391
- Reaction score
- 9,935
I have valves on the fresh water vents for the overflow when driving. I opened in the driveway and watch for water to come out then know tank in full. Close it up before driving. I used to watch the water flow out as I went down the street. I put the valve tied to the frame right by a door I check whenever I load up.