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Old 07-30-2012, 07:55 AM   #1
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Replacing our water heater


There are two water lines that run into the hot water heater. The cold water in and the heated water out. Last night after we unhooked the water line that brings the hot water into the pipes in the house, it just kept on pouring water out. It only stopped when we turned the water completely off. Is this normal or what did we do wrong? It wasn't just alittle water it was a lot!

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Old 07-30-2012, 08:02 AM   #2
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Replacing our water heater


the cold water supply (in) does have to be completely shut off, whether it be at a shutoff near the heater or the main itself. Cold water coming in is what forces the hot water out. normal.

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Old 07-30-2012, 08:12 AM   #3
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Replacing our water heater


We had the water heater completely disconnected and the cold water valve shut off but the line that the hot water comes out of water heater into pipes had pressure and water was coming out of it without being connected to the water heater
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Old 07-30-2012, 08:24 AM   #4
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Replacing our water heater


Heater should have been shut off, cold water line shut off, tank drained, relieve the pressure in the line by opening up a hot water faucet, then cut the lines.

If you have the old style gate or globe valve shut off this would be the time to replace it with a ball valve.
The old style valves tend to leak, and not shut off completly.
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Old 07-30-2012, 08:45 AM   #5
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Replacing our water heater


If you had water coming out of the 'HOT' side ---it was likely caused by 'cross over' from a mixing valve at a sink--tub or washing machine that uses a single handle faucet----

or there is a miss piping somewhere in the house---Wouldn't be the first time someone had the inlet and outlet pipes wrong on a water heater----trace your pipes back to the water meter and make sure someone, long ago , didn't pipe the heater wrong.
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Old 07-30-2012, 09:10 AM   #6
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Replacing our water heater


Either that, or it was just slowly draining out from a floor above.
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Old 07-30-2012, 09:10 AM   #7
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Replacing our water heater


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Originally Posted by oh'mike View Post
If you had water coming out of the 'HOT' side ---it was likely caused by 'cross over' from a mixing valve at a sink--tub or washing machine that uses a single handle faucet----

or there is a miss piping somewhere in the house---Wouldn't be the first time someone had the inlet and outlet pipes wrong on a water heater----trace your pipes back to the water meter and make sure someone, long ago , didn't pipe the heater wrong.
And if it is a "cross over" you may not need a new heater....Cold water bleeding to the hot may give the impression that your heater has problems when its actually a bad faucet cartridge
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Old 07-30-2012, 01:09 PM   #8
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Replacing our water heater


the hot water was venting from up top within the house.the cold water shut off shuts the tank water pressure off... did you drain the old HWH down by opening the relief and drain the hot water riser into the house..out the hose connection on the bottom? valve...you need t open all the hot water faucets on all sink/tubs to vent the riser

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Last edited by biggles; 07-30-2012 at 01:13 PM.
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