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 > winterizing black tank flush with air

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WE-C-USA

NW Missouri

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Posted: 11/08/19 06:01pm Link  |  Quote  |  Print  |  Notify Moderator

A side note. Also blow out your fresh water fill line with fresh tank valve open.


Frank & PJ
2004 2500HD GMC Duramax 4X4
2018 Grand Design-Refection 303RLS


cummins2014

Utah

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Posted: 11/09/19 10:08am Link  |  Quote  |  Print  |  Notify Moderator

dryfly wrote:

I've always been successful winterizing by just blowing air through my water lines. I know there is an anti-siphon valve in the black tank flush system. Will just blowing out this line clear water from it?


Thats one that I have never messed with winterizing. Its apparently draining out on mine , or have been lucky. 12 years of winterizing on my fifth wheel, and haven't had an issue with it

Splashers3

Oakville, MD

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Posted: 11/09/19 05:55pm Link  |  Quote  |  Print  |  Notify Moderator

Me too, I've never blown out my black tank flush in over 12 yrs. I do hope it just drains into the tank when driving down the road. Knock on wood, I've never had a problem either.


2017 GMC 3500 Sierra Denali, C/C, D/A, DRW, w/40gal Aux tank, 18K B&W Patriot.
2019 Cedar Creek Hathaway, 34RL2 - w/Bells & Whistles and disc brakes
Traded 2009 Cedar Creek Silverback, GII, 32 WRL


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