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Thread: Condensate draining

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  1. #1
    DIY Junior Member
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    Default Condensate draining

    I am going to be installing a weil-mclain ultra-80 gas boiler and have worked out all the issues except how to deal with the condensate. I have a 1920's twin with cast iron DWV and no drain in the basement. Any suggestions on how to get rid of the condensate from the boiler?

    Thanks

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    If you haven't got someplace to gravity drain the stuff, then you'll need a condensate pump. This could go to the washing machine drain, if it has enough slope, or could be pumped there with the pump.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
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    Default More info

    I don't have a place to gravity drain it, and my wahing machine is on the 1st floor. Does this mean I am going to have to cut into the cast iron pipe and install a drain trap, etc?

  4. #4
    DIY Senior Member finnegan's Avatar
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    You can cut into the case iron or just pump it outside.

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    Pumping outside in freezing weather is often not a good solution...you could pump it upstairs to the washing machine standpipe, or you'd have to make a connection into the sewer someplace convenient (is that an oxymoron?).
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  6. #6
    Plumber plumber1's Avatar
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    Default boiler

    I'm not sure exactly what you mean, but why cant you drain the steam line gravity back to the bottom of the the boiler?

    Guess I don't know what: twin with cast iron DWV....is.

    What did the old boiler do with condensate?

  7. #7
    In the Trades Bob NH's Avatar
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    There are lots of little condensate pumps that will pump through a flexible tube or anything else to get rid of 20 gallons per hour against 15 ft of head. They cost in the range of $40 to $60.

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