Looks like a extremely expensive $250 air compressor in a plastic box you can hand on the wall and permanently plumb in..
![](https://i.imgur.com/Dx5PUgNl.jpg)
You do realize that you can go to Harbor Freight and buy one of these..
![](https://shop.harborfreight.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/6/3/63152_W3.jpg)
For $10 and plumb it in with a "Tee" and shut off valve, for safety can add in a pressure switch to turn it off at 40-50 PSI for $30
The Lippert system also seemed to have a lot of complaints that it as very loud..
You can buy at HF a very quiet 120V air compressor meant for airbrushing that is very quiet, has built in pressure switch also for automatic operation..
![](https://shop.harborfreight.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/9/5/95630_W3.jpg)
$89.. they used to sell just the compressor but now it includes air brush stuff, just discard or give away the air brush..
I am not sure why you find you need multiple people to go in out of your RV to winterize..
I must be doing something wrong as I am the only one winterizing my RV..
I have used a portable "pancake" air compressor and I just use the simple "blowout" plug available anywhere and adapted that to standard air quick connects.
I also can just layout some hose from my garage compressor..
Drop regulator pressure to under 50 PSI and open the first faucet in line and close when only air comes out and then to tub and bath sink and then final is toilet..
Then open the water line drains..
Process only requires one person (me) and less than 15 minutes of time..