Originally Posted by mustang
We are ready to winterize for the first time Thanks for the info.
So you just blow out the fresh water lines instead of adding antifreeze to those lines?
Yes, you can use either method, here's the Antifreeze method.
If you have any inline water filters remove and bypass before starting.
Drain the fresh water holding tank, close the valve.
Drain and flush the gray and black holding tanks. If your RV doesn’t have a built in tank flushing system clean the black tank out with a wand, or use a product like Flush King that allows you to clean both the black and gray tanks, close the valves. Drain the water heater. Remove the drain plug and open the pressure relief valve, close the valve and replace drain plug. CAUTION (never drain the water heater when it is hot or under pressure)
Open all hot and cold faucets; don’t forget the toilet valve and outside shower.
Locate and open the low point drain lines. There will be one for the hot and cold water lines. Using the water pump will help force water out, but turn it off as soon as the system is drained.
Recap all drains and close all faucets.
By-pass the water heater. If you do not have a by-pass kit installed the water heater will fill up with antifreeze before it goes through the water lines, wasting six gallons of antifreeze.
Install a water pump converter kit, or disconnect the inlet side of the water pump (the line coming from the fresh water holding tank). Connect a piece of clear tubing to the inlet side of the pump and put the other end into a one gallon container of non-toxic RV antifreeze.
Turn the water pump on and pressurize the system. Starting with the closest faucet, slowly open the hot and then cold valves until antifreeze appears. Replace the antifreeze container as required.
Repeat this process on all faucets from the closest to the farthest away. Don’t forget the outside shower, if equipped.
Flush the toilet until antifreeze appears.
Turn the water pump off and open a faucet to release the pressure. Pour a cupful of antifreeze down each drain. Pour a couple of cups in the toilet and flush into the holding tank.
If your water heater has an electric heating element make sure it is turned off. This will protect the element if the unit is plugged in while being stored.
Make sure all the faucets are closed.
Consult your owner manuals for winterizing icemakers and washing machines.
The unit is winterized.