question regarding winterizing TT-Oil-less compressor?

I use an oil/water separater from harbor freight ($6) when I spray finishes on wood or paint with my oil bath compressor. It does a great job keeping oil and water from ruining the finishes.

http://www.harborfreight.com/oilwater-separator-68246.html

I wouldn't hesitate using one for blowing out your lines if you are really worried about oil contamination.

I would most definitely blow out the city water. There is a check valve that can retain water. Some have had this freeze and cause trouble. If your manual says to blow out the flush line then I would do that. Make sure you keep the pressure down to around 50-60 psi unless the manual says otherwise.

aftermath- thanks for the reply. I am concerned about winterizing my tank flush system because my owners manual says to do it. I am not concerned about using my NON oil-less compressor, as it just goes to sh**t tank, and I wouldn't care if oil got in there anyways. lol.
But I am wondering if I need to even blow out my city water connection? Or are they self draining?

Why are you worried about winterizing your tank flush system? Doesn't this valve drain once the water source is removed? This has been discussed on the Airstream forum and the agreement is that the flush system does not need to be winterized. I have never done mine and have not had a problem.

It is suggested that the pressure should not be more than 60 psi. There are two arguments here. If it is more than 60 you can damage fittings in the trailer. On the other hand, if you have a built in pressure reducer you should be good to go. The pressure reducer works regardless of it is water pressure or air pressure.

I have never heard about any problems using a compressor that uses oil. This has never been discussed regarding "oil taste" in the water lines. Even if this was true, why would it matter when blowing out your black water rinse line? This confuses me.

You can buy an adjustable regulator from Harbor Freight. I always leave one valve open. Open second valve then close the first.

Roy B- How are you controlling how much PSI that portable one is pumping? I have a portable small compressor to, but it simple has a PSI gauge on the side that reads what PSI you are pumping something up to. No way to limit it to 50PSI and keep it there

The problem with using non oil-less type compressors is over time your water lines will take on a OIL taste which you will never completely get rid of...

I use the 12VDC tankless portable air compressor. It may not be the fastest one in the world but airs up my trailer and truck tires and all the kids bicycles at the camp grounds...

This is the Q Industries portable MV50 12VDC 150 PSI Air Compressor available from AMAZON. It fits in its nice carry bag under my truck back seat. I usually sit this on my truck tailgate and hook into the trailer batteries and then I can use the provided long air coil hose to walk around the trailer and tires...


I also use this air compressor along with the CAMCO 36153 Blow Out Adaptor to blow out my water lines for winterizing. Being TANKLESS it takes more time to build up air compressor which is ideal for blowing out water lines.


Perfect setup for me and my OFF-ROAD POPUP trailer.

Roy Ken

i am not sure i would worry about the oil-less part. if you have a good compressor...use it. i would much rather use that compressor than to not blow out the lines. very cheap extra insurance for a very few minutes work

I actually have a small mini compressor I keep in my truck that plugs into cigarette lighter. I am thinking maybe this would work as it is Oil-less, but I have no clue how much PSI it puts out but it cant be very much