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I learned more about our coach this fall.
A couple of times we have had water on the floor of the water bay. Some might think that since it’s called the “water bay”, having water on the floor shouldn’t be a surprise. But that isn’t the case. The “water” should always be “inside” the tank, plumbing, and associated devices (water heater, pump, etc.) and the floor of the water bay should be dry. A few years ago Jeff Rowe from East Tennessee Luxury Coach diagnosed water on the water bay floor as a leaking water tank which he replaced. It was dry after that until this summer.
We’ve had a problem with the pressure/temp relief valve on the water heater dumping water after driving for a few hours if the pump was on. Learning from the PC Forum that I needed a new valve I had ordered a new one (75?psi vs much higher rated one available at Home Depot, etc.), but hadn’t gotten around to installing it. During some down time on our trip from Wisconsin to Maine (I think we were at Liberty Harbor RV Park in Jersey City), I replaced the valve. Very easy to do once I had pulled the plug on the water heater, gotten my large Crescent wrench out, and got in a position to reach into the water bay.
I thought maybe the water in the water bay was from the pressure relief overflow hose … but nope, still had a little water on the passenger side and more water on the driver’s side. Once we got to Maine for a rally, Liberty Coach had their support semi and trailer on site along with two mechanics. I mentioned this problem (along with a broken entry door handle that needed replacing) to the mechanics and they found that a short nipple in the valve between the cutoff valve and a filter from the fresh water tank was loose just enough to leak a few drops of water every once in a while. Solution was simple. Empty the fresh water tank, unhook the plumbing to the valve, put plumbers tape on the threads, screw it in tight, and we’re good to go. x
(Side story. We were parked next to another rally goer who had the Liberty guys do some work on their coach earlier in the day. We were about 18 to 24 inches higher than our neighbor was. When we emptied the 200-gallon fresh water tank the water went … where? Downhill of course. In a few minutes the neighbors came running over and frantically told the Liberty guys they had a MASSIVE water leak in their coach and didn’t know where it was coming from!!!!! “You need to come quickly!!” Once we explained what we had done, they were very relieved.)
“Good to go” … or so I thought. The fresh water tank was empty so I went about filling it. While I had the driver’s side water bay door open and watching the water go in, my wife was running water in one of the lavatories. Suddenly we had a fountain where the gray water down pipe was joined to the grey water bypass valve by a short rubber hose. The water was spraying up from the rubber hose; grey water bypass valve was closed. I tried to tighten the hose clamps holding the hose in place, but they were tight. After 19 years the rubber had probably dried up and given up. I mentioned this to the Liberty guys and they knew exactly what to do. A little while later they had replaced with the old rubber hose with a new rubber hose. x
So we were getting water on the water bay floor for two different reasons. The leaking pipe from the fresh water tank was subtle, and a slow drip. The leak from the grey water down pipe rubber connection hose was largely hidden and only presented itself when the water was run in a sink or the shower. You had to be standing by the bay with the door open when someone else ran water to see it.
Note to owners of older Prevost owners. Part of “zeroing out” your coaches is replacing fluids, belts, and hoses. Don’t overlook rubber water hoses that will deteriorate over time whether they are pressurized or not, they can leak.
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