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Old 09-24-2011, 12:39 AM   #1
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Another winterizing question

I am getting ready to winterize and am going to use the air compressor method for the first time...... this is the first TT I have had that I can do this with. The question I have is,,,, on the back side of my water heater there are 3 valves instead of just do I know which one to shut off.......everything else is very simple to follow by doing this method.
I just wondered if anyone else has 3 valves on their water heater.
Thanks gentlemen,

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Old 09-24-2011, 02:33 AM   #2
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Well, the simple answer is, if every thing is working correctly, turn all of them. They will only turn 90 degrees, or 1/4 turn. The long answer is, you want to stop the flow of water in to the water heater, so the bottom one is inlet, make sure the handle is crossways to the the plumbing. You don't want to back feed the outlet of the water heater, so make sure the one is closed, crossways to the plumbing. You do want to bypass the water heater, so make sure the one feeding the bottom line and the top line is open, in line with the plumbing.

Hope this is the answer you were looking for

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Old 09-24-2011, 04:40 AM   #3
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You can have one, two or three valves. Three valves just means that you have a bypass installed, which is nice.

This diagram that I had found on another website shows how to bypass a three-valve system ...

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Old 09-24-2011, 07:24 AM   #4
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I just drain the water heater first by removing either the plug or anode rod, replace the plug, then blow out the system. No need to manipulate the bypass since the water heater will hold pressure in the system anyway. Be sure to run your onboard pump briefly during the blow-out to ensure any water within is voided.

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