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Expansion tanks

Empire_2
Empire_2 Member Posts: 2,343
To answer your question The air cushion in the tank can be absorbed by the system through gravity circulation. On a down cycle, the cooler water laddent with air tends to move to the system while water from the system moves to the tank. Using the Airtrol tank fitting will eliminate this problem.

Mike T.

Comments

  • Dave_98
    Dave_98 Member Posts: 9
    Exspansion tanks

    Anyone have any good suggestions or reasons that exspansion tanks are always filling up over time?
  • Lurkin' Murkin'
    Lurkin' Murkin' Member Posts: 136


    And also, if you are using automatic air vents anywhere in the system, the tank will get waterlogged alot quicker than usual.
  • especially when the

    Especially when the pump(s) are on the return side of boiler
  • WaterHeaterGuy
    WaterHeaterGuy Member Posts: 80


    What kind of expansion tank? Is this a diaphragm-ed tank?

    If not, be sure to use a scoop rather than a micro-bubble eliminator. Micro-bubble elims (such as a spirovent) can over time steal all of the air from a conventional unit.
  • WaterHeaterGuy
    WaterHeaterGuy Member Posts: 80
    Does it have a bladder?

    What kind of expansion tank? Is this a diaphragm-ed tank?

    If not, be sure to use a scoop rather than a micro-bubble eliminator. Micro-bubble elims (such as a spirovent) over time can steal all of the air from a conventional unit.
  • Dave_98
    Dave_98 Member Posts: 9
    exspansion tanks

    This tank is on a large commercial job, I do NOT believe it has a bladder, I believe the pumps are located on the return side of the system.
  • Glenn Sossin_2
    Glenn Sossin_2 Member Posts: 592
    air and water mix

    Especially under pressure and heated. What are the size of these tanks. Could you use an airtrol fitting?

    http://www.bellgossett.com/productPages/Parts-Airtrol-Tank-Fittings.aspan ATF fitting ?
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