Thread Tools Display Modes
Old 09-01-2015, 06:48 PM   #21
Senior Member
CAT-RN's Avatar
Join Date: Jul 2014
Posts: 3,987
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 ??


CAT-RN is offline   Reply With Quote
Old 09-02-2015, 12:39 PM   #22
Senior Member
NCBBA11043's Avatar
Join Date: Feb 2015
Location: Ohio
Posts: 112
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.

NCBBA11043 is offline   Reply With Quote
Old 09-02-2015, 12:48 PM   #23
Georgia Frog Rally 2017
aceinspp's Avatar
Join Date: Jun 2015
Location: GA
Posts: 7,244
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.
X 2 Later RJD
2015 35 FT V-Lite 30WRLIKS Diamond Package
2015 Chevy 2500 6.0 4:10 gearing.
Days camped in 2015--46
Days booked for 2016--60
Days camped in 2016 so far 51
aceinspp is online now   Reply With Quote
Old 09-03-2015, 08:59 AM   #24
Senior Member
Wolverine 1945's Avatar
Join Date: Jul 2014
Location: SouthWest Michigan
Posts: 2,100

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 !!!

Wolverine 1945 is offline   Reply With Quote

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

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 11:16 AM.