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Old 05-20-2011, 02:41 PM   #1
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Water heater T&P plumbed to cold supply


Helped a friend replace a water heater today. Located in a utility room under a raised beach house. Water heater is a 50 gallon low boy on a shelf raised about 4" above the floor. Connections about a foot below the ceiling. Cut the electric off, closed the gate valve and drained the heater. Cut the hot and cold connections off with a saws-all. T&P plumbing went back into the plywood covered wall, hit it with the saws-all. Water came out under full main pressure. Quickly shut off the supply to the house, no damage done. Finished removing the tank and opened the wall to investigate. The T&P drain was hard plumbed back into the cold water side.

Has anyone ever heard of such a configuration and what could be the possible reason to do this?

Installed the new tank and plumbed the T&P down to the floor. Capped the old pipe to the cold supply.

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Old 05-20-2011, 05:59 PM   #2
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Water heater T&P plumbed to cold supply


And the plumber said "That's going to cost a little extra"

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Old 05-20-2011, 06:01 PM   #3
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Water heater T&P plumbed to cold supply


The things people do...
So, if the T&P blows, which faucet would turn itself on first?
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Old 05-21-2011, 08:11 AM   #4
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Water heater T&P plumbed to cold supply


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Originally Posted by rjniles View Post
T&P plumbing went back into the plywood covered wall, hit it with the saws-all. Water came out under full main pressure. Quickly shut off the supply to the house, no damage done. Finished removing the tank and opened the wall to investigate. The T&P drain was hard plumbed back into the cold water side.

Has anyone ever heard of such a configuration and what could be the possible reason to do this?
It was a wrong connection. There is no socially redeeming reason for doing this.
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Old 05-21-2011, 08:38 AM   #5
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Water heater T&P plumbed to cold supply


Whoever did that must never have seen a video of a water heater exploding, like the one that they had on "Mythbusters" one time. It shot way up in the air like a great tumbling rocket.
I've heard of people even plugging off the T&P too. KABOOM!
LOL
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Old 05-21-2011, 04:42 PM   #6
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Water heater T&P plumbed to cold supply


Further info on this:

This was not done by some hack DIY. There was a label on the tank of the plumbing company that did the work 17 years ago. And you could tell that no changes had been made since then. Called the tel #, apparently no longer in business - wonder why?.

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