Using compressed air, you can winterize your RV on your own. By far, the easiest approach to make sure there is no remaining water in your RV is to do this. Of course, you would want an air compressor and a blowout plug before beginning.
A blowout stopper is a tiny gadget connected to a water line that entirely drains it. You may buy this online or from any retailer that sells RV accessories. On the other side, you may blow water out of your RV's tanks and pipes by using an air compressor to pressurize air. You can choose between an air compressor with a tank and one without.