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Old 02-22-2010, 05:22 PM   #1
Join Date: Nov 2009
Location: Little Rock, Arkansas
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Hey guys. I own a rent house that had two flex copper pipes joined to connect the copper in the wall to the water heater. The flex pipes had been joined with a galvanized fitting and had rusted. I had intended to cut the flex copper and solder a copper coupling between the two. Unfortunately, I broke the flex pipe off at the wall. Prior to starting this I had turned off the cold supply to the gas hot water heater and turned off the water heater. After having breaking the pipe I left to return the next day to connect the heater to the rigid copper in the wall. Perhaps I am moron, but the next day the tenet said that their daughter arrived home from school and found a substantial amount of water on the floor. How could this have happened? I left the cold at the heater off. The only thing I can fathom is that the water came from the water heater. I did not cap it at the hot nipple. Any thoughts or did I do something stupid.

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Old 02-22-2010, 05:45 PM   #2
Join Date: Jan 2009
Location: South of Boston, MA
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Water can back feed thru faucets when they are turned on

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Old 02-23-2010, 08:37 AM   #3
Mold!! Let's kill it!
Join Date: Feb 2008
Location: Central Pennsylvania
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Yep. Somebody opened both hot and cold at the same time at a faucet somewhere and back fed the hot line. Especially easy to do with single lever faucets.
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