Does Your Fresh Water Tank Keep Filling When Connected to City Water?

Are you having the situation where you attach your RV to the city water supply at an RV park (or maybe in front of your home) and after a few hours you notice water is coming out of the vent line from the Fresh Water tank? What could be causing this? The most common cause is a leaking Check Valve inside your water pump. This Check Valve is a one-way valve which only permits water to flow from the Fresh tank through the pump and into the RV plumbing. It prevents water from travelling in the opposite direction.

However, when this valve starts to fail, it allows water to move from your plumbing, backwards through the pump and into the Fresh tank. Over several hours it will fill the Fresh Water tank until water comes out the vent line of the Fresh tank. The temporary solution is to turn off the City Water supply and use your water pump until you've emptied the Fresh tank. The proper solution is to replace your water pump.

Clicking on "water pump" will take you to the appropriate section in my online parts catalog. Parts will be shipped directly to you and you can pay with a credit card. If you need me to install the pump and leak test the entire plumbing system, please call me (Howard Chadwick) toll free at 1-866-783-6286.