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BlueBSH 10-21-2010 08:22 AM

water heater heat traps
How can you tell if you have heat traps on your water heater? Our heater was installed in 2002, but not sure if what I am seeing is heat traps or not...

The heater has two galvanized pipes coming out of it that where screwed into the heater then it switches to copper that screws ontop of the galvanized pipeing...

are these heat traps? is there any way to tell for sure? thanks!

It's an A.O. Smith power vent water heater from 2002

AllanJ 10-21-2010 08:55 AM

I think the heat trap referred to is a twisted strip of metal going down the flue in the middle of the tank. It takes some of the heat of the exhaust gases and passes the heat on to the water in the tank.

BlueBSH 10-21-2010 08:57 AM

no, these are heat traps to prevent circulation of hot water between the cold and hot lines so you dont have all your heat escaping through the cold line

BlueBSH 10-22-2010 01:37 PM

no one knows what im talking about?

Gary in WA 10-22-2010 03:26 PM

Doesn't sound like you have any. They are inlet/outlet piping configured in a sideways "C", just before it supplies the tank or leaves vertically. Others are a full circle, pp.#6:


plumber666 10-22-2010 03:26 PM

Sounds like what you're looking at is just adapter fittings from female thread to sweat copper. A heat trap fitting will be about 1 1/4" diameter and 2 inches long of solid looking brass.

Ishmael 10-22-2010 05:06 PM

Heat traps are just a piping arrangement in which you come out of the top of the tank, then turn 180 degrees and pipe down about 12" or so before then turning 180 degrees back up. It doesn't sound like you have them.

I know Weil-McLain recommends them on their "Plus" units. You can probably find a diagram on their web site.

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