Winterizing black tank flush

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 :(

I also use the hand pump for black tank flusher, makes the job very simple.

or you can just blow the line clear with air. that is what I have been doing.

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 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....

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.