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Pressure tank glass seals.

icy78 Member Posts: 404
Anyone got a link or info for replacement seals for hydronic pressure tank sightglass? I have not changed these before but the top one I am suspicious is leaking air out and thus water logging the tank.


  • bob_46
    bob_46 Member Posts: 813
    Any supply house, the two valves on the gage glass should be closed except when checking the level . If they are left open it could leak air.
  • icy78
    icy78 Member Posts: 404
    Ok thanks. Guess I should've said compression tank.☺ I haven't found just the seals. In fact I've only seen the glass and rods. Is it usually a kit or buy separately?
  • MilanD
    MilanD Member Posts: 1,160
    edited February 2017

    Looking 4 this?

    Crown 70322 5/8" Gauge Glass Packing Nut Kit. This kit includes everything you need to repair leaking gauge glass valves in the field. https://smile.amazon.com/dp/B013ID4M40/ref=cm_sw_r_other_apa_SZNMybGE9Q75D
    JUGHNE Member Posts: 10,801
    Soap bubble leak detector may show you the leak. Often it is the valve stem packing on the top valve.