All my rigs have had a red/hot drain line too. Disconnect city water, turn off power and propane to WH. Open pressure relief valve and open the red line. Depending on where your line is it may drain the lines but not the tank. If you pull the anode or nylon plug depressing on your tank you will drain it quickly. My current one is 12 gal and it shot water out a good 7-8 feet. Don’t stand I don’t of that plug unless you want to get wet. Hope this works for you.
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Tom
2019 Alpine 3651RL
2016 F350 CC DRW
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