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> Winterizing Black Water Tank
n1vwd
post Sep 14 2011, 08:09 AM
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From: Vermont
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Hello to all in the group.
I live in VT and I am in the process of winterizing my TT for the year. I have read that after draining the black water tank you should always add 3 to 5 gallons of water to the tank to keep any remaining solids from drying out and keep every thing in solution. Do you still do this at the end of the season? What about freezing, wont it damage the tank? If I drain the tank what about any residual nasties left behind wont they dry out.
All replies will be greatly appreciated.


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Brad - N1VWD

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SteveE
post Sep 14 2011, 11:19 AM
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I am also new to RV's (and this group), but I subscribe to the theory that if there is no water, then there is nothing to expand (which is what causes damage) when it does freeze. In addition, the salts naturally present in the contents of the black tank (without adding lots of extra water) will inhibit freezing to some extent when in use. So, I have been just washing and well draining the tank and calling it good. I do leave the drain open for a long time to confirm that is is well drained. Same with the grey tank, other than the addition of a cup of RV antifreeze in every drain to protect the traps.
We live in the Bend (Oregon) area which is high desert and while it does get cold (we had our first freeze a couple weeks ago), it is nothing like the interior climates. And I have no idea what winters in your part of the country are like.
However, we do use our trailer off and on through out the winter as a base for winter hiking, skiing, and snowshoeing as my wife prefers it over a snow cave (....and I have to admit that is sort of nice....). So I go through the draining process multiple times a year (about eight last year and looking forward to atleast as many trips this year). Of course, since I dump into my homes septic tank, I have plenty of time to let it all drain. I also try to pick days that are above freezing to do this, even if means I have to leave the trailer for a few days (heated) until it warms up enough to dump.
Having only done this for one year, perhaps I have it all wrong. So I too look forward to hearing what other members have to say.
Regards,
Steve
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