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Old 01-05-2016, 04:52 PM   #1
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first experience in sub freezing temp

It got down to the mid teen at night in Wichita last week end.
Before night fall, I opened up black and grey tank valves, so that water does not accumulate in the tank.

The next morning the valves were frozen stuck. I couldn't close it.

I took out my portable heater outside, and heat blow the valves from the exterior.
They finally turned loose , and I can close it.

I could probably repeat the same procedure the next time around , on our next trip to Colorado on Feb, but doing the same procedure every day seems a lot of work.

What's the best practice with handling tanks and valves on sub freezing temp ?
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Old 01-05-2016, 06:00 PM   #2
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I would,not leave the black tank valve open. The valves will freeze up no matter.
I would dump and flush, then close them until the weather warms or you need to dump again.

You don't mention what type rig you have but if you have a enclosed underbelly and are running your furnace, your tanks should not freeze and the valves, if enclosed should be resistant to freezing. Forcing those valves while frozen can damage the seal.
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Old 01-05-2016, 06:35 PM   #3
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You can always put some RV antifreeze in there...That's RV antifreeze NOT automobile antifreeze
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Old 01-05-2016, 08:34 PM   #4
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Never leave the valves open, dump & close. Even with full hook ups I wait till the tanks are nearly full. Only freezing was the camps hose bib, I wrapped it with heat tape and foam noodles, problem resolved for the next week with sub freezing every night.
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Old 01-06-2016, 04:25 AM   #5
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Can we assume that you own some model of SLX? If so your options may be limited other than what has been mentioned if your tanks are not enclosed.

Good luck.
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Old 01-08-2016, 05:51 PM   #6
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Yes mine is small 154BH SLX. Dumping anti freeze may be an idea

what about the following :
1. before the temp drop every night, drop a half bottle of anti freeze each on both grey and black tank. Let it mix with existing water

2. In the afternoon after temp rise above freezing dump both tank


Questions I have :
1. Does mixing half bottle and 5 to 8 gallons of water in black tank, or grey tank enough to prevent the tank to freeze over night ??

Quote:
Originally Posted by norty1 View Post
Can we assume that you own some model of SLX? If so your options may be limited other than what has been mentioned if your tanks are not enclosed.

Good luck.
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