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Air bleeder screw on CI rad

Fred Rappuhn
Fred Rappuhn Member Posts: 107
When install cast iron standing rad's, does the air bleeder screw go on the return side of the rad. ? Or does it matter?


  • Jamie Hall
    Jamie Hall Member Posts: 23,433
    Doesn't really matter for hot water. When you're bleeding the radiator, the water will come up to the level of the bleeder on both sides.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    Fred Rappuhn