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Old 11-07-2015, 01:31 PM   #11
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Quote:
Originally Posted by tmmar View Post
Area51,
If I remember correctly, you just have to close the one valve that lets the cold water into the heater. Once that is closed, nothing should go into the heater. If that is not working, the valve may be defective.

If you don't close the hot water valve, then antifreeze can back up through the bypass line and hot water line into the heater if it's ever the path of least resistance (say, all faucets are turned off while anti-freeze is being pumped).

Further reason you need to close all three valves: the hot water, the Coldwater, and the bypass valve.
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Old 11-07-2015, 01:32 PM   #12
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Originally Posted by Billr View Post
I-RV is correct, there are 3 valves on the back of the water tank. Hot, cold, bypass. Have to use all 3.


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Agreed.
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Old 11-07-2015, 01:33 PM   #13
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The best diagram others have posted before me (thanks!).


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Old 12-15-2015, 03:16 PM   #14
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Anybody know how to get to the hot water bypass valve on a 2014 Flagstaff Classic Super Lite 5th wheel?
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