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Thread: Hot water heater plumbed in reverse

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  1. #1
    DIY Member export!'s Avatar
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    Oct 2009
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    Ontario, Canada
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    90

    Default Hot water heater plumbed in reverse

    I always wondered if it was a big deal that my hot water heater was apparently plumbed backwards. The cold water entered into the HOT nipple. I just moved the unit and while replumbing it I took the liberty of correcting the apparent mistake.

    Haha. Now I think it truly is backwards and perhaps the original plumber swapped the dip tube so it matched the existing pipes better.

    When I run some hot water in the house, I can hear the new cold water "percolating" in. I can hear it apparently running in and splashing into the top of the water column. As I understand it, it should enter through the dip tube to the bottom. I do not recall hearing this before. At first I wrote it off to not being completely bled of air but now I'm wondering.

    Would that sound indicate that it's now backwards? I guess I can either replumb it -PITA - or switch the dip tube back to the marked COLD side. Is it a simple task to switch the tube? It is a John Wood (GSW) heater - made in Canada I do believe.

    Thanks again.

    Scott
    Last edited by export!; 10-29-2009 at 02:30 PM.

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