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Old 09-08-2014, 10:26 PM   #15
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Ford Super Duty Owner
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Location: Mcdonough, Ga.
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Originally Posted by rvcaptain View Post
I'll give it a try...was at a FMCA rally this weekend and got the same advice -- among much more -- from The Committee. They did pull the overflow valve out (it is on the top surface of the tank) and there is NO TUBE going down into the tank. I am not a physicist, but it seems to me that if the exit valve is above the water surface it should not siphon out!

Many thanks.
I was speaking of the water sloshing out. the water tank has no baffles inside it. therefore the water sloshes across it every time you turn a corner. Think about how many curves are in a normal road. the water is continuely sloshing back and forth.

1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
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Old 09-08-2014, 10:46 PM   #16
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I would agree with the others, to lose that much water it would most likely be a siphoning issue..once it starts siphoning the water just flows out. There is no way it would go into your grey holding tank unless you had a faucet open somewhere and your pump was on.

Mike & Charlotte
2014 Newmar Canyon Star 3610
Orange County, California
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fresh water, tank, water

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