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Old 04-11-2011, 05:36 PM   #1
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Fresh Water Tank question

I am camped for the season at a campground. I usually hook up to the city water supply (on the side of my 2007 Puma trailer).

Question: When I drained the tank to winterize this year, it took forever. We discovered that the city water hook up had filled the reserve tank. How do I bypass the reserve tank so water is coming directly from the "hose" in the city hook up?

By the way, my water heater is on the opposite side of the trailer as is the shower and kitchen. Does that make a difference?

Thanks for any help - Karenazoo

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Old 04-11-2011, 07:42 PM   #2
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There should be a check valve to keep the city water out of the water tank, sounds like your check valve has failed and allowed water into your fresh water tank. If this is the case, eventually the fresh water tank will be overflowing from the fresh water fill spout

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Old 04-12-2011, 05:33 AM   #3
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Fresh Water Tank

Thanks - I'll check into that.
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Old 04-12-2011, 06:50 AM   #4
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I am not so sure about this.

There is a check valve (that physically is in the 12 volt water pump) that prevents city water from getting into your fresh water tank. To replace that check valve you would need to replace (or rebuild) your water pump.

If the check valve has cracked or the seals hardened such that it is a slow leaker, it is "possible" that it filled it over months of city water pressure, but at some point it would be "full" and you would have water coming out your fresh tank vent (next to the gravity fill port).

Having said that, are you sure you never put water in that tank?

The fresh water drain is a TINY spigot for a 38 gallon tank.
Even half full, it takes about 30 minutes to drain completely.
I usually just open it and go about my business of getting it ready to winterize. By the time I am done winterizing, the tank is usually empty and I close the sigot.

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
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Old 04-12-2011, 07:11 AM   #5
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Lou covered any suggestions I would have contributed, but I did want to welcome you to the forum.

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Old 04-12-2011, 07:59 AM   #6
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if it is the check, it may be easier to add an in line check to the discharge of the pump.
another suggestion would be to put some water in the fresh water tank, disconnect from city water, and run the pump for a couple minutes (run some water at sink, shower where ever). u just may have some trash in the check that can be bushed out.
disconnecting and going on the self contained water is also a way to check the check: with all faucets off, the pump shouldn't keep cycling. if it does, the check is leaking.

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