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Old 05-23-2024, 10:37 PM   #1
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Mysterious source of water leak when hooked up to city water

2016 Minnie Winne 22R. When I am hooked up to City Water I get a slight water leak from under the rig. Any idea where I should be looking for the source? I use a water pressure regulator.
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Old 05-24-2024, 03:00 AM   #2
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In terms of RV specific things, in my experience -- usually it's because the city water / tank fill valve didn't close all the way, allowing fresh water tank to over-fill. (Leak comes from a drain tube, as designed).

Holding tanks in general are prone to leaking when overfilled, it strains the inlet connection. Always a fun day when that happens at the black tank. When I first started RVing, for whatever reason I had this idea in my head to let the tanks fill before I emptied em. Better to empy those things very frequently, for several reasons.

Once it was a cracked strainer (just downstream from the pump). Probably freeze damage; if you camp in cold weather, on some rigs you need a heater in the wet bay (a hundred watt incandescent bulb may be enough). Twice it was a bad check valve, which caused water to shoot out of the faucet in the wet bay whenever the water pump came on. Not uncommon for those to fail. Typically just downstream from the fresh water inlet, replacements available at home depot.
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Old 05-24-2024, 07:14 AM   #3
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Similar issue a couple months ago occurred to us too.

Turned out to be a leaking water pump in the rear of the coach. In my case I forgot to reduce the water pressure at the source.

Search and fix mission is needed.
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Old 05-25-2024, 05:57 PM   #4
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I've had issues in two places -
As someone else mentioned, water being forced back into the fresh water tank, then leaking out the overflow.
Leak from the water inlet to the toilet (probably happened when the water pressure was too high).
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Old 05-27-2024, 04:15 AM   #5
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bad check valve in the water pump allowing city water connection to slowly feed into the fresh water tank and overfill it.
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Old 05-27-2024, 11:20 PM   #6
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Turn off city water, then Run water pump, then check again. Sometimes trash in pump keeps check valve from closing, so leak is tank overflow.
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Old 05-28-2024, 10:08 AM   #7
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Winnebago
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22R (Serial Number begins with 10320U1) Drainage & Water

22R (Serial Number begins with 10320U2)
Drainage
Water

Winnebago plumbing drawings for your 2016 22r

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