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Gravity System Boiler Replacement

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Comments

  • jbeck
    jbeck Member Posts: 15
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    How do you connect PEX to the risers? I assume 3/4" pex --> 1.5" iron risers?
  • Ironman
    Ironman Member Posts: 7,376
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    jbeck said:

    @Ironman
    What is your method of flushing the radiators and risers? Can it be done while connected to the boiler? (I assume you didnt take each radiator outside and flush with the hose)

    I took a sample of my boiler water - when i place a magnet against the water, all the black specs are attracted to the magnet.

    The manifolds allow isolation of each loop for flushing, filling and purging.

    Iron oxide particles are normal and actually helpful in protecting the iron surfaces in the system. If that's all you've got, then it doesn't need flushing. If there's sludge, then it needs to be flushed and treated and any leaks repaired.

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • jbeck
    jbeck Member Posts: 15
    edited February 2019
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    @Ironman
    I recently replaced a radiator valve - when I stuck my finger inside of the radiator, there was some black gooey stuff. So there's definitely sludge.

    What is your method to remove sludge on a working hydronic boiler system?

  • Ironman
    Ironman Member Posts: 7,376
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    jbeck said:

    @Ironman
    I recently replaced a radiator valve - when I stuck my finger inside of the radiator, there was some black gooey stuff. So there's definitely sludge.

    What is your method to remove sludge on a working hydronic boiler system?

    That would totally depend upon how the system is piped.

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • bob eck
    bob eck Member Posts: 930
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    As a rule, I don't do combi's.

    What are your main reasons not to use combi boilers?





  • grant_andrew
    grant_andrew Member Posts: 22
    edited April 2019
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    Beautiful install! I'm working on a very similar retrofit of old iron pipes and I'm going with a homerun approach for similar reasons. I'm curious, did you go with 1/2" or 3/4 pex al pex?
  • Ironman
    Ironman Member Posts: 7,376
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    I believe it was 5/8" on that job.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,013
    edited April 2019
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    What size pipe is your LLH? Looks like 2".

    I like to have two tappings at the top. One for an air vent and another for a sensor. We have been using this one for awhile; very affordable.



    (Thank you kcopp)
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Ironman
    Ironman Member Posts: 7,376
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    3”.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • bob eck
    bob eck Member Posts: 930
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    Alan what brand LLH is the one you have on here? Where do yo get it from?
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,013
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    http://tamashydronic.com/index.php

    Talk to Peter.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab

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