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Old 09-01-2015, 06:48 PM   #21
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I've never winterized my black tank flush or water line inlet. Never had any leaks so I guess it need not be winterized ??

But I would guess if one worried about it blow a little air thru it ??


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Old 09-02-2015, 12:39 PM   #22
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Anti-Freeze for the tank flush system

If you really want to run anti-freeze into/thru the tank flush system - here's an idea (although I haven't tried it yet).
First, some assumptions:
You have a threaded connection on the flush system
You have an external shower/hose with garden hose connectors on it
You have a winterizing bypass system

Take a gallon container of anti-freeze. Put the winterizing system dip tube in it (so far, just like winterizing any camper). Put system in bypass mode.
Connect your external shower/hose to the tank flush connector.
Start your water pump, open the cold water valve on the external shower. You should now be pumping pink stuff throughout the plumbing system, including through the external shower and into the tank flush system.

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Old 09-02-2015, 12:48 PM   #23
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Originally Posted by Vern View Post
Not generally considered a big issue, but the presence of any water in the tank seems to risk some freezing around the valve seal. Therefore, I always try drain it well at my last dump of the season, and again at winterizing time. If you use RV antifreeze, you will be adding a little of the pink stuff to it when you flush the toilet to winterize the supply lines to the toilet. I try to run the flush until there is about as much pink stuff down the drain as there was water before it. That should technically do the job.
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Old 09-03-2015, 08:59 AM   #24
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I thought I had blown the complete system out last fall,,, but found canister to be full,,, Not only was the canister broken,,, so was the unit it screws to !!!
It was a real PNTA replacing them !!!

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black, black tank, black tank flush, tank, winter, winterize

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