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RV Water Pump Shooting Water Out Water Hose Inlet

by Randy
(Oregon)


I just unwinterized my 1999 Fleetwood Mallard. I hooked up garden hose to fresh water supply pressurized system, no leaks everything worked fine. I then put water in holding tank turned on pump to check plumbing when the water shot out the garden hose inlet why is it doing that?

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ANSWER: Hi Randy thanks for submitting your question on our Ask An RV Question Page

I am going to assume that you are the one that originally winterized your RV so if you had any water heater bypass valves activated that you have reset them to the normal non-winterized position.

The most common cause of the problem you are experiencing is a bad Water Check Valve (see picture at the top of this page) that is built into the city water hose connection on your RV. It sounds like the internal is not closing when the city water hose is disconnected so the water pump is just pumping water out that connection rather than to the faucets, etc.

The bottom line is that you are going to have to replace the City Water/Tank Fill Inlet on your RV to fix this problem. In most cases this is a fairly simple and straight forward job of unfastening any attaching screws and unscrewing the inlet from the city water/tank filler water line on the RV. All you have to do is reverse the process listed above to install the new one. After you are done you should no longer have water being pumped out of the city water inlet when the water pump is on.

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I hope that this helps.

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Happy RVing

RVing Al

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