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Water Logged Expansion Tank

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Steve Curran_2
Steve Curran_2 Member Posts: 2
in THE MAIN WALL
I Have A Water Logged Expansion Tank. I Have Been Draining The Tank Today At Least Three Times My Problem Is The Pressure In The Boiler Is Building Up And The Taco Combination Water Fill Valve Pressure Relief Valve 30 lbs. Of Pressure Is Leaking Out Of The Taco Relief Valve. I Have A Thrush Tank Fitting In The Old Expansion Tank Could This Be My Problem Not Maintaing The Proper Air Cushion For Expansion. Should I Install A Taco-Trol Tank Fitting For Better Results And How Do They Work. I Did Have This Same Problen Six Years Ago.Draining The Tank Solve The Problem Looking For Answers.

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  • jeff_13
    jeff_13 Member Posts: 12
    tank

    you must make sure the tank is total empty of water becase the can pull a vacum when draining like a glass in the dish water turn up side down will hold the water intill the vaccum is broken jeff
  • Tony_8
    Tony_8 Member Posts: 608
    could be

    fill valve is stuck on. drain tank, fill system to cold pressure, shut off fill, watch pressure as system runs. If it creeps up it's probably tank. If not, probably fill valve.
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