Before you get started there are a few items you will need to have. These items can be found in most RV parts stores:
- Non-toxic RV antifreeze (the amount depends on the layout and length of your plumbing lines. 2 to 3 gallons will normally do).
- A water heater by-pass kit, if not already installed.
- A water pump converter kit, or tubing to connect to the inlet side of the water pump.
- Basic hand tools to remove drain plugs.
- If you have any inline water filters remove and bypass before starting.
- Drain the fresh water holding tank.
- Drain and flush the gray and black holding tanks.
- Drain the water heater. Open the pressure relief valve, remove drain plug. CAUTION (never drain when hot or under pressure).
- Open all hot and cold faucets; don't forget the toilet valve and outside shower.
- Locate and open low point drain 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 pump (the line coming from the fresh water holding tank) and connect tubing from the pump into a gallon of 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.
- Repeat on all faucets from the closest to farthest away. Don't forget the outside shower.
- Flush the toilet until antifreeze appears.
- Turn the water pump off and open a faucet to release the pressure. Go to the city water inlet. Remove the small screen over the inlet and push in on the valve with a small screwdriver until you see antifreeze. Replace the screen.
- 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 turn it off. This will protect the element if the unit is plugged in while being stored.
- Make sure all faucets are closed.
- The unit is winterized.