Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Ancient F&T trap?

Is this an old F&T trap just before the receiver tank?


  • Pumpguy
    Pumpguy Member Posts: 629
    Maybe yes, maybe no.......

    but more importantly, why is it there.? Does this trap discharge into the condensate pump's receiver?  If yes, that's a definite no-no and shouldn't be there.  When that trap closes, the pressure on the return side becomes equal with the steam side, and with no pressure differential, there's no flow, so there's no heating. 

    Remember, all fluids, steam, air, water, flow from high pressure to low pressure.  Always!.  No pressure differential, no flow.

    This is called "master trapping" the system, and is supposed to compensate for leaking traps out in the system.  For reasons stated above, this should never be done.   The only proper solution to steam blowing out the condensate pump's receiver tank vent is to fix the bad steam traps out in the system.
    Dennis Pataki. Former Service Manager and Heating Pump Product Manager for Nash Engineering Company. Phone: 1-888 853 9963
    Website: www.nashjenningspumps.com

    The first step in solving any problem is TO IDENTIFY THE PROBLEM.
  • ttekushan_3
    ttekushan_3 Member Posts: 958
    float trap

    Sure looks like a float trap to me. It doesn't have a venting thermostatic element. So it provides little if any venting. If that return's supposed to be dry and vent system air into that vented receiver, you may have some interesting steam distribution issues.
  • Steamhead
    Steamhead Member Posts: 16,719
    That's an F&T

    the cap in the top has a thermostatic element under it. It might be a Webster but I'm not 100% sure.

    is this a one-pipe or two-pipe system?
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
This discussion has been closed.