Anon, Make sure gas or breaker(power) is turned off to the Heater so it will not come on during draining,connect a hose onto bottom valve of water heater, run hose to a floor drain and insert, turn your water main off so as not to fill tank while draining, open water heater drain valve, water will then drain from attached hose into floor drain until empty. For water to run faster you may open a near by hot water tap, this will allow air into tank as you drain it, do not forget to turn this tap off before refilling tank. You then can turn main back on for a bit if you would like to do a flush of sediment from the bottom of tank. See links below for more instruction and video. "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info." How to Drain Water Heater Today Homeowner
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Anon, Make sure gas or breaker(power) is turned off to the Heater so it will not come on during draining,connect a hose onto bottom valve of water heater, run hose to a floor drain and insert, turn your water main off so as not to fill tank while draining, open water heater drain valve, water will then drain from attached hose into floor drain until empty. For water to run faster you may open a near by hot water tap, this will allow air into tank as you drain it, do not forget to turn this tap off before refilling tank. You then can turn main back on for a bit if you would like to do a flush of sediment from the bottom of tank.
See links below for more instruction and video.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
How to Drain Water Heater Today Homeowner
How to drain water heater
http://www.bobvila.com/articles/how-to-drain-a-water-heater/#.VxqJ6NQrJxA