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Old 09-23-2011, 06:50 AM   #1
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Emptying gray tank for winter...on flat ground or hill?

My gray tank keeps 1 - 2 gallons of water in it if it is drained on level ground. To get more water out of it, I need to drain it on a steep hill.

I plan to use it off and on for winter. Was planning on drianing gray tank on flat ground and not having to find a hill each time.

Will a couple of gallons water left in gray tank hurt it if it freezes in winter? Or should I drain it on a hill?
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Old 09-23-2011, 07:46 AM   #2
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Just add RV antifreeze to it and you should not have a problem.
When I winterize my motorhome and I purge all faucets with the antifreeze it all goes down into the waste holding tanks and that's where it stays until spring and I've never had a problem

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Old 09-23-2011, 07:50 AM   #3
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Your dump valve could be damaged if it has water in it or pushing on it when the water freezes. I would add RV antifreeze to the water tank in sufficient quantity to prevent freezing/damage. Other alternative would be to leave dump valve open (not the best idea if you forget to put the drain cap back on).
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Old 09-23-2011, 08:07 AM   #4
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On level ground, use your leveling jacks on right side to raise that side high enough to drain tank.
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Old 09-24-2011, 02:10 PM   #5
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Slacker just add some anti freeze to the tank and you'll be okay
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Old 09-25-2011, 10:24 PM   #6
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Quote:
Originally Posted by RovinOn View Post
Just add RV antifreeze to it and you should not have a problem.
When I winterize my motorhome and I purge all faucets with the antifreeze it all goes down into the waste holding tanks and that's where it stays until spring and I've never had a problem

Regards,
RovinOn
X2.
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