Air purge Central Boiler Hdx 360

  • Active since 1995, is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.


Sep 10, 2016
Lunenburg Vermont
Good Afternoon,

I replaced the Taco 0011-f4 circulator pump yesterday because it started making a lot of noise while running. I shutoff the ball valves on either side of the pump before removing and lost less than a cup of water in the process of replacing the pump.

Question: Should I attempt to purge air from the system? If so I am not clear as to how to get it done. I did view a central boiler video that showed where you connect to your pressurized water supply and then open and close the supply valve and then return valve on the furnace. I don't understand how this would purge air but maybe I am missing something?

Any help would be much appreciated.