Can't find any info on winterizing a black tank flush line. The part where you hook up your hose to flush our your black tank. I know ours drains where we unhook our hose, but dose this drain the part in the black tank?

My new Outback has the same flush system. I've owned the TT for 2 months now and soon facing winterizing. I've been thinking about that seprate connection there, and I've come to the conclusion, that's a perfect candidate to blow-out with an air compressor. It's not like it's connected to the rest of the water system. It is a single line, open at both ends. The question is, how many bends and turns does the pipe take and potential for water to stand in it. Still, I would think it "should" drain completely, and no idea how one would get pink stuff in there. So my conclusion was to blow it out, regardless if it "really" needs to or not?I'm taking my TT back to the dealer next Wednesday for a 2 month post purchase (free) inspection. I'll ask about it then. Still, I think a tour through the factory that built my camper is in my future plans. I've done that with all my campers and it's really helped me understand things (just) like this!My suggestion, blow it out regardless!

Another method is to get a clear garden hose and fill the hose with pink, then connect to your flush connection and to a hose and push the pink in the hose down the clear hose, stopping the flow before water runs into the RV.

I don't know what your flush lines look like but, can you use a hand pump on it? Instead of connecting to city inlet connect to cleanout tap.

My black tank flusher connects in the valve control area. What I do is take a short 4 foot water hose and connect the male end to the flush connection. The female connection end on that hose goes to my outside shower faucets. When I run A/F from the water pump thru the system I open each faucet one at a time. When I get to the outside shower, the pink runs thru those faucets and into the hose and in thru the black tank flusher. All in one step, and no drips. Easy peezy.

Vulcaneer wrote:... When I get to the outside shower, the pink runs thru those faucets and into the hose and in thru the black tank flusher. ...Yes, that would work, except .. I don't have an outside shower on that side of the camper. :(My old camper had an outside shower and no black tank flusher. You know, that still a :(

Winterizing black tank flush | Good Sam Community

john_b1
Explorer
Oct 17, 2013
MNRon wrote:
I agree with the flush line that runs into the toilet inside, and would expect the leak when you flush if not winterized properly. The exterior black flush that you hook a hose up to is the one I have never bothered with, and question the need for exotic winterizing means for this that some seem to go to.

X2 for 30 years now and no problem yet! Jb
MNRon
Explorer
Oct 16, 2013
I agree with the flush line that runs into the toilet inside, and would expect the leak when you flush if not winterized properly. The exterior black flush that you hook a hose up to is the one I have never bothered with, and question the need for exotic winterizing means for this that some seem to go to.
Vulcaneer
Explorer
Oct 16, 2013
Paul Clancy wrote:
Definitely winterize the black flush. There is usually a backflow prevention valve that water stands in and if not winterized it will freeze and crack. Next time you flush water all over. Ask me how I know.

This is true. I probably found this out the same way he did.
Paul_Clancy
Explorer
Oct 16, 2013
Definitely winterize the black flush. There is usually a backflow prevention valve that water stands in and if not winterized it will freeze and crack. Next time you flush water all over. Ask me how I know.
MNRon
Explorer
Oct 16, 2013
We live in MN, it gets cold here. I've never worried about the black flush line when winterizing (many years) and it still seems to work fine. I suspect it's built to drain free each time, otherwise I certainly would have seen a problem by now.

FWIW, I used the air method to winterize for several years...until one spring a few years ago I found a broken fitting under the kitchen sink (it got WET when we were just about to take our first trip of the year). Since then I've used the pink stuff...hmm...maybe it's time again this weekend...
ontheroad101
Explorer
Oct 15, 2013
Thanks for all the good tips. Medical conditions may keep us in PA longer then we would like. In the passed we would go south to winterize.
therink
Explorer
Oct 15, 2013
I live in Western NY and have always blown out my back tank flush with air using the same 50 cent garden hose threaded air chuck adapter. Takes about 3 seconds.
ford_truck_guy
Nomad
Oct 15, 2013
old guy wrote:
or you can just blow the line clear with air. that is what I have been doing.

X2 on this.. not a problem , just needs a couple short spurts of air to reach the black tank....
BB_TX
Nomad
Oct 15, 2013
Vulcaneer wrote:
My black tank flusher connects in the valve control area. What I do is take a short 4 foot water hose and connect the male end to the flush connection. The female connection end on that hose goes to my outside shower faucets. When I run A/F from the water pump thru the system I open each faucet one at a time. When I get to the outside shower, the pink runs thru those faucets and into the hose and in thru the black tank flusher. All in one step, and no drips. Easy peezy.

Same here. Very easy, IF you have an outside shower near by.
old_guy
Explorer
Oct 15, 2013
or you can just blow the line clear with air. that is what I have been doing.

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