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Thread: ToeKick Hydronic heater installed wrong... what to do??

  1. #1
    DIY Junior Member pdx.drippy's Avatar
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    Default ToeKick Hydronic heater installed wrong... what to do??

    A friend of mine had a plumber install a small toekick hydronic heater a few years ago & it never ever worked properly. There is a regular old 50gal electric H2O heater next to the bathroom. The "plumber" put in 3/4, 3/4, 1/2 T in the top of the water heater. 3/4" cold enters from the top & 3/4" hot exits vertically. 1/2" parts exits (all in PEX) to a recirculator pump & then to the heater & returns on the 1/2" part of the cold Tee. There are shut valves on both the 1/2" hot & cold at the water heater.

    anyway, there is some mixing of hot & cold now, do I need to put in some kind of check valve somehwere? mixing valve? she'd like to use the thing. this is in portland, oregon....

    thanks in advance for any advice

  2. #2
    Moderator & Master Plumber hj's Avatar
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    Of course there has to be a check valve in the system somewhere, otherwise, depending on pressure differentials, the cold water could flow through the radiator and enter the hot water piping.

  3. #3
    In the Trades Jerome2877's Avatar
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    Well if it never worked then why wouldn't that friend have called the plumber back to fix it? It could be a few problems, the dip tube in the HWH could be cracked causing a mixture of cold and hot. It could be a failed check valve or an element/thermostat on the HWH not working.

    Also what temp is the heater set at? Hyronic heat is usually higher than a regular HWH.
    Last edited by Jerome2877; 12-03-2010 at 03:35 PM.

  4. #4
    DIY Junior Member pdx.drippy's Avatar
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    I put in a spring loaded check valve in the return, just b4 the cold water T.
    THx 4 the advice on raising the temp, its not working that great right now.
    will get a mixing valve to tone donw the temp of the hot water 4 the taps.
    the other "plumber" was clueless i guess... oh well, thx again 4 the replies

  5. #5
    Moderator & Master Plumber hj's Avatar
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    quote; the other "plumber" was clueless i guess

    Being a "plumber" does NOT make you a heating expert, or even a "heating man". The two trades have different requirements, even though both work with pipes. You would NEVER ask a heating man to fix your faucet, would you, (or does it depend on how much he would charge you)?

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