Need help purging my heating system

Discussion in 'General Plumbing Help' started by H2oheartny3, Nov 11, 2019.

Help Support Plumbing Forums by donating:

  1. Nov 11, 2019 #1

    H2oheartny3

    H2oheartny3

    H2oheartny3

    Member

    Joined:
    Mar 2, 2018
    Messages:
    10
    Likes Received:
    0
    Location:
    ,
    I have a hot water heating system in my house. 3 floors - 1 rad on 3rd, 3 rads on 2nd, and 5 rads on first. All on one zone. 3rd floor radiator keeps losing heat every year. I’m guessing I need to purge the air out of my system, only there is no purge valve on my return... what’s the best way to purge all of the air out of system?
     
  2. Nov 13, 2019 #2

    TomFOhio

    TomFOhio

    TomFOhio

    Professional Professional

    Joined:
    Jan 20, 2018
    Messages:
    948
    Likes Received:
    204
    Location:
    Mansfield,, Ohio
    Add a ball valve and a tee with a boiler drain in the line. Check the radiators to see if you have any bleeders on them.
     
  3. Nov 14, 2019 #3

    johnjh2o

    johnjh2o

    johnjh2o

    Senior Member Professional Lifetime Supporter

    Joined:
    Jul 21, 2011
    Messages:
    3,282
    Likes Received:
    749
    Location:
    Melbourne, Florida
    Are they freestanding cast iron radiators or baseboard radiators? If they are freestanding then there not a loop system and can't be purged. They will have a vent with a key or screwdriver slot to remove the air. It can also be that there isn't enough water pressure for the water to reach the top floor.
     
  4. Nov 14, 2019 #4

    TomFOhio

    TomFOhio

    TomFOhio

    Professional Professional

    Joined:
    Jan 20, 2018
    Messages:
    948
    Likes Received:
    204
    Location:
    Mansfield,, Ohio
    This is true, what is the pressure on your boiler. When we had more than one floor we usually bumped it up to 20 lbs and
    that made a big difference.
     

Share This Page