(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 6 of 6

Thread: boiler pressure regulator

  1. #1
    DIY Junior Member RyanA's Avatar
    Join Date
    Feb 2014
    Location
    Tennessee
    Posts
    2

    Talking boiler pressure regulator

    does anyone have a make or model of a PRV that can go down to 12 PSI? I have one now that goes down to 25 PSI and I'm afraid if I fire the boiler my water pressure will blow the relief. Most PRV go to 25 min...help

  2. #2
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    Quote Originally Posted by RyanA View Post
    does anyone have a make or model of a PRV that can go down to 12 PSI? I have one now that goes down to 25 PSI and I'm afraid if I fire the boiler my water pressure will blow the relief. Most PRV go to 25 min...help
    Watts make them that are set for 15 PSI.

    http://media.wattswater.com/1910265.pdf


    Good Luck.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  3. #3
    DIY Junior Member RyanA's Avatar
    Join Date
    Feb 2014
    Location
    Tennessee
    Posts
    2

    Default

    Quote Originally Posted by DonL View Post
    Watts make them that are set for 15 PSI.

    http://media.wattswater.com/1910265.pdf


    Good Luck.
    Thanks Don!

    I'm good!

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,412

    Default

    This is a hot water, not steam? Most domestic boilers need somewhere around 12-14psi of water pressure in them to operate properly. If it is properly setup to account for expansion when the water is heated, it should not rise much, if at all. The safety valve needs a bit of margin, and since most boilers can handle up to somewhere around 50psi, 30psi safety relief valve gives both the normal pressure range and the overall boiler's safety range in the sweet spot. Changing that valve to 15psi is just asking for problems unless I'm missing something. If you have an autofill valve, once the system is filled properly, shut the supply valve to it off, and the boiler should never get over-pressurized.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  5. #5
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,652

    Default

    The one I posted is adjustable.

    It is just preset at 15 PSI.

    But it can be adjusted down if needed.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  6. #6
    In the Trades Tom Sawyer's Avatar
    Join Date
    Nov 2010
    Location
    Maine
    Posts
    2,942

    Default

    Watts S1156F or the Taco 339 both are designed for boilers and both are adjustable and come set at 15lbs.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

Similar Threads

  1. Pressure test PEX with air compressor pressure regulator
    By chuckd83 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 5
    Last Post: 01-21-2014, 10:07 AM
  2. Water pressure regulator problem pressure increases overnight
    By igornys in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 21
    Last Post: 10-12-2013, 12:45 PM
  3. Watts Pressure regulator does not hold water pressure
    By goshenplumber in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 3
    Last Post: 05-05-2013, 07:23 AM
  4. Bad pressure regulator?
    By dabensys in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 05-28-2010, 05:53 AM
  5. Changing water pressure on house pressure regulator.
    By kskier in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 04-30-2010, 09:20 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •