Portable air compressor plugs into cigarette lighter

I installed a 12-volt outlet in a central bay on each side of my coach so I can reach all of the tires and the water bay with my 12-volt "TruckAir" compressor. I picked up the power from the 15 amp bay lighting circuit. I blow out the water lines by pressurizing the system, including the water heater and accumulator tank, to about 50 PSI before bleeding it off at the faucets and drains. Two or three recharges and the job is done.

Although I like the look of Francesca's better, E-Trailer offers one also:
7 pin adapter

Francesca Knowles wrote:
I presume your rig has a trailer light connection at the rear- there are adapters that you can plug right in for 12volt power. Here's a link for the seven-pin style pictured below.

HUH, didn't know they made such a thing.
bumpy

I have one of the quality 12V compressors that pull a lot of power, so I use one of these plus the 12V extension someone linked to earlier, and connect directly to my battery to avoid the risk of blowing a fuse by plugging into one of the 12V power outlets.

Roadpro 12V Battery Clip-On and Cigarette Lighter Adapter

K Charles wrote:
You can blow out the lines with a bicycle pump. Even if you don't think that will work, which it will, it will be good enough to get you home.

No. More like push some of the water out of the lines with a bicycle pump. To really "blow" out the lines you need a much higher continuous flow of air. But I agree it may be enough to get you home. Remember PEX tubing is resistant to freezing anyway....

Hi,

I managed to blow up a relay in my E-450 by drawing too many amps from the clearance light circuit.

Bumpyroad wrote:
HUH, didn't know they made such a thing.
bumpy

B.O. Plenty wrote:
Maybe it's just me, but I doubt that little 12 volt compressor will work very well to winterize. It won't have a high enough volume of air to really blow anything out..But maybe somebody else has a different opinion???

B.O.

Yea, I beg to differ, I have one of those 12volt compressors and blew out my water lines with it. My TT is a 26ft box which is a little bit larger than the op's class c 24ft (according to his signature) and it did the job for me. Now normally I don't use the 12 volt,I do have a 100psi 3gallon compressor that I use, but the wife wanted to go camping this past holiday weekend and it started getting real cold so I had blow my lines before it was to late. With no power available at the storage yard, I had to go with the 12volt using my truck 12 volt receptacle. Like someone stated in an earlier post you can use a bicycle pump, you just need to have the correct volume of air to push that water out.