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extrol chge

Paul_69 Member Posts: 251
can a extrol tank increase in air pressure by itself on system or would someone have to pump air in? i have from time to time found more than 12 psi in tanks when dropping system to 0 psi to check and had to lower them on single or two story homes.


  • Steamhead
    Steamhead Member Posts: 16,900
    They may have been

    over-charged at the factory and the original installer did not check for proper pressure. 
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
  • Paul_69
    Paul_69 Member Posts: 251

    always told you can check pressure in extrol if system is dropped to 0 psi. is it better to pull tank off system?
    EBEBRATT-Ed Member Posts: 15,626
    I like

    I like an isolation valve between the expansion tank and the system and a boiler drain between the expansion tank and the isolation valve. You don't want any water pressure on the tanks bladder to influence the air pressure.