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PRV relocation

joboli
joboli Member Posts: 4
in THE MAIN WALL
After reading "Pumping Away" I have decided to reconfigure my boiler piping (as suggested in Dan's book) to eliminate those water fall sounds and prepare to add a radiant floor loop in my den. I have 2 questions:

1) Can I move the current pipe which contains the fill valve and PRV combo (this is an old B&G setup) to the Point of no pressure change? Or does the PRV need to be separated and connected some place else? Currently they are connected to the boiler return pipe at the bottom of the boiler. Obviously my new configuration will include an airvent which the "Deadmen" never included.

2)The current Extrol expansion tank (looks like it's fairly new) is mounted on it's side above the boiler. Can I leave the tank in this orientation and simply move the pipe to the bottom of the airscoop? Or does it need to hang below the airscoop as pictured in Dan's book?

Thanks in advance for your help.

Joe

PS: Dan, If you are reading this, just wanted you to know how much I've learned from your books. I never thought technical books could be so entertaining and fun to read.

GOD BLESS AMERICA!!

Comments

  • Mark J Strawcutter
    Mark J Strawcutter Member Posts: 625
    prv

    assuming you mean pressure reducing valve and not pressure relief valve, then yes the PoNPC is the best place for it to go. Pretty sure "pumping away" has a good discussion of why this is so.

    Mark
  • lisa riles
    lisa riles Member Posts: 1


    Below is a link to the B&G website, showing the proper installation of "pumping away" using the dual unit PRV/Reliev Valve. As shown in the drawing, we recommend moving the expansion tank so that it connects to the bottom of the in line air separator.

    http://fhaspapp.ittind.com/literature/files/1899.pdf
  • joboli
    joboli Member Posts: 4
    Should I install an ASME relief valve as a saftey precaution?

    Thank you for your help.
    I suppose I should install an ASME relief valve as a saftey precaution? (in place of the current non ASME relief valve on the dual unit B & G setup) If I install one, where is the best place to put it? This boiler has no separate tapping for a relief valve.

    The original documentation from B & G specifically warns against the use of this setup in place of an ASME saftey valve.
  • Mark J Strawcutter
    Mark J Strawcutter Member Posts: 625
    non-safety relief valve

    "The original documentation from B & G specifically warns against the use of this setup in place of an ASME saftey valve."

    I noticed that, too, in the documentation that Lisa posted the reference to.

    What's the point of a relief valve in combo with a regulating valve it it isn't valid as a safety?

    Mark
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