Remove the short hose from the pump (have a towel handy for the anti-freeze that will leak out) and re-attach the line from the cold water tank to the pump.Remove the sink drain plug/strainer so anti-freeze will go through the drain line and protect the p-trap. When the water coming out of the faucet turns pink turn the pump off.Attach a separate hose (about 24" long) to the pump inlet and place the other end of hose into a jug of anti-freeze.Locate the water pump and remove the hose fitting that joins the cold water tank supply line to the pump (an arrow is embossed on the pump's plastic that shows the direction of water flow-and make sure the water pump is turned off) have a towel handy because a small amount of water is going to drip out of the pump even with the pump turned off.Drain the cold water tank (turn the tank drain valve 180° to drain).For this reason we recommend a more thorough winterizing procedure. The problem with the gravity drain is that low spots in the water line may still have water in them and water in the water filter canister cannot escape. Open the valves as well as the sink faucet (to break the vacuum) and-in theory-water should drain out of the camper using nothing more than gravity. Locate the two T-handle valves on the floor of the camper (usually on the floor under the galley, under the exterior shower, or in a corner of the camper box). Most Flagstaffs with hot water systems have a "gravity drain" option using two simple shut-off valves. If you have more time but no anti-freeze and no air compressor the next best option is the gravity drain. That alone could spare hundreds of dollars in repair. If you can't fully winterize the camper for some reason (no time to winterize before a freezing night, you're out of town and a neighbor is trying to save the day, etc.) and you want to minimize the potential damage that freezing temperatures can inflict: pull the plug from the water heater ( step 3 & 4 in Hot Water section below). The six parts of the water system most at risk of freezing are:
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