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Author Topic: sidearm install.hot water backing into cold water lines  (Read 3526 times)

dukethebeagle

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sidearm install.hot water backing into cold water lines
« on: November 16, 2015, 07:09:19 PM »
the title says it all.after install hot dhw seems to be backing up into cold water lines :bash:
 any suggestions
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mlappin

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Re: sidearm install.hot water backing into cold water lines
« Reply #1 on: November 16, 2015, 07:17:53 PM »
Thats weird, how old is the water heater?
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juddspaintballs

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Re: sidearm install.hot water backing into cold water lines
« Reply #2 on: November 16, 2015, 07:31:54 PM »
Does the sidearm feed back into the top of the water heater via the cold line or the hot line?
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dukethebeagle

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Re: sidearm install.hot water backing into cold water lines
« Reply #3 on: November 16, 2015, 07:51:06 PM »
i used a reem rudd water heater.i removed the elements and used the threaded  element ports in the side of the
tank to plumb the sidearm.the hot water exits the top like normal
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mlappin

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Re: sidearm install.hot water backing into cold water lines
« Reply #4 on: November 16, 2015, 10:49:03 PM »
Could it be old enough that the drop tube on the cold side rotted off?

I cut our old electric water heater apart years ago to make hog feeders out of, the cold side tube was laying in the bottom of it, what was left of it that is.
« Last Edit: November 17, 2015, 12:40:41 PM by mlappin »
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slimjim

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Re: sidearm install.hot water backing into cold water lines
« Reply #5 on: November 17, 2015, 03:04:31 AM »
Very good diagnosis Mlappin, I would put money on it that you have it nailed on that one, solution, put in a heat trap on the cold water inlet to stop the thermal convection into the cold water line.
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dukethebeagle

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Re: sidearm install.hot water backing into cold water lines
« Reply #6 on: November 17, 2015, 04:54:22 AM »
could i just add a check valve on the cold water line.also the cold water enters the bottom not from the top.

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slimjim

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Re: sidearm install.hot water backing into cold water lines
« Reply #7 on: November 17, 2015, 05:00:38 AM »
A check valve may help but probably will not stop heat migration from moving up your pipe, a heat trap in the cold line will stop it as heat does not like to migrate downward, a heat trap is nothing more than a drop in the vertical piping
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dukethebeagle

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Re: sidearm install.hot water backing into cold water lines
« Reply #8 on: November 17, 2015, 08:06:00 AM »
o.k :thumbup:
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dukethebeagle

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Re: sidearm install.hot water backing into cold water lines
« Reply #9 on: November 17, 2015, 06:18:39 PM »
thnx slim.worked like a charm.up and running in 15 minutes.
had a glass of cold water.now time for a cold canadian brewski :thumbup:
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slimjim

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Re: sidearm install.hot water backing into cold water lines
« Reply #10 on: November 18, 2015, 02:40:37 AM »
A glass of cold water? do you know what fish do in that stuff? I would stick with the brewski thanks!
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Roger2561

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Re: sidearm install.hot water backing into cold water lines
« Reply #11 on: November 18, 2015, 04:14:12 AM »
Quote from: slimjim on November 18, 2015, 02:40:37 AM
A glass of cold water? do you know what fish do in that stuff? I would stick with the brewski thanks!

 ;D ;D ;D   :post:
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dukethebeagle

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Re: sidearm install.hot water backing into cold water lines
« Reply #12 on: November 18, 2015, 04:54:52 AM »
eeeeeeeeeeeeeeeeeeeeeeeeeee!!!!!!!!!!!!!!!!! :o
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shepherd boy

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Re: sidearm install.hot water backing into cold water lines
« Reply #13 on: November 18, 2015, 05:43:04 PM »
Quote from: dukethebeagle on November 17, 2015, 04:54:22 AM
could i just add a check valve on the cold water line.also the cold water enters the bottom not from the top.
Be careful with check valves on cold side hot water heaters. As water heats it expands. Heard of one water heater that blew up and knocked out a basement wall. Had a sidearm on. Need a way to let the water expand.
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juddspaintballs

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Re: sidearm install.hot water backing into cold water lines
« Reply #14 on: November 19, 2015, 09:58:20 AM »
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