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Old 09-30-2013, 10:26 AM   #1
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City water to fresh water tank valve?

Hooked up some high pressure city water and in addition to bad seal directly at the inlet, it seems like I blew something out. Is there a bypass valve somewhere? Detached the hose from the inlet, am using our fresh water tank and now my pump is trying push water out of the city water inlet. So, for now I'm shutting the pump off after every usage and trying to figure out if there is a valve between the city water and the fresh water tank. Haven't investigated much yet but thought I'd throw this out there before I start tearing things apart....
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Old 09-30-2013, 11:57 AM   #2
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Hi and welcome to the forum.

Sorry for your troubles. High water pressure can cause some real problems if the coach isn't protected by a regulator.

On many RVs... there are two connections between the city water and the fresh water tank. The first is a backflow prevent valve and the second is the valve which determines if you're using city water or filling your fresh water tank. Those are two places to look but you'll just have to follow the lines to track down and fix the problem.

BTW, it will help you get more accurate answers if you add the year, make and model of your rig in your signature line. You can do that via the User Control Panel (User CP).

Best of luck finding the problem and please consider buying a pressure regulator.

Rick
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Old 09-30-2013, 12:02 PM   #3
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Thank you Rick!
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Old 09-30-2013, 01:23 PM   #4
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Had that happen to me in the long ago past. It was the backflow valve on the city water inlet. Mine was a cheap plastic one and it was located right on the backside of the city water inlet connection where you hookup your hose. Hope yours is as easy to find. My other problem was I could see it where it was but really hard to get any tools or my hand there. I wound up taking the whole face plate off to change the backflow valve. It's still working fine.
Good luck and safe travels!
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Old 09-30-2013, 09:44 PM   #5
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Hey Mr. Magoo,
Thanks for that. Definitely the cheap backflow giving me a problem. I found that there was so much buildup from hard water that it wasn't releasing back. I cleaned it up a bit and am good for now but will change it out when I run out of excuses...
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Old 10-01-2013, 05:51 AM   #6
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Quote:
Originally Posted by Pat J. View Post
Hey Mr. Magoo,
Thanks for that. Definitely the cheap backflow giving me a problem. I found that there was so much buildup from hard water that it wasn't releasing back. I cleaned it up a bit and am good for now but will change it out when I run out of excuses...
Good work!

There are a couple of other things that can go wrong with the inlet check valve - the O-ring on it can go bad or it can become dislodged from the valve stem, or the plastic retainer can come off the valve stem inside the valve. Those things are a little harder to fix. I know - I have had them both happen to me.

In case I am unsuccessful at doing a quickie repair on the valve, I carry a plastic plug with male hose threads to use to plug the inlet. That will get me by without water spewing everywhere by until I can get to an RV dealer to get a new inlet valve assembly.
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Old 10-02-2013, 04:54 AM   #7
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Thanks Paz. I agree it's a dealer issue. Out of my league!
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