Leaking valve stem

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by kecorry, Apr 18, 2007.

  1. kecorry

    kecorry New Member

    Messages:
    3
    I have an older speakman two stem tub assembly that has a leak along one of the stems. I tried repacking the old assembly and I still had a drip coming out along the stem. I purchased a new stem assembly and I still have a drip coming out along the stem.

    My question is - should I be placing some type of liquid thread sealer or lubricant on the stem? The new valve has new packing around the stem. When I installed it I just tightened the stem packing nut (it was loose) and put the valve in the wall. Am I doing something wrong or is this possibly something else?

    Thanks

    kecorry
  2. Verdeboy

    Verdeboy In the Trades

    Messages:
    2,051
    Was the valve stem in the "open" position when you screwed it on? Did you try tightening the packing nut some more? Some plumbers on this forum use a bit of teflon tape on the valve stem threads.
  3. kecorry

    kecorry New Member

    Messages:
    3
    Verdeboy,

    I think the valve stem was partially open, I don't like turning the valve in with the seat closed. The packing nut was still tight, but I loosened and re-tightened it and the drip stopped for a few seconds, but started again.

    I could try some teflon tape on the stem threads (good idea) and I was thinking about using some waterproof grease below the packing nut. Hopefully that will stop the leak.

    Thanks for your reply,

    kecorry
  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,313
    Location:
    New England
    Is it leaking when the water is off or only when you are running water? If it is leaking while the valve is off, then you may need to replace the seat. If the seat was in bad shape, you may have ruined the washer on the new stem - they can get corroded and act like broken glass and really mess up a seal quickly.

    If it is leaking only when the water is on, you might need to redo the packing. I don't think pipe sealant is used in this situation, but I'm not sure. Tape, almost certainly not.
  5. kecorry

    kecorry New Member

    Messages:
    3
    Jadnashua,

    It only leaks in the on position. Before attempting repacking the stem I was thinking of some plumbers waterproof grease on the stem and stem threads. It's not a large leak, just a drip so maybe this will be enough.

    Thanks for your reply,

    kecorry
Similar Threads: Leaking valve
Forum Title Date
Plumbing Forum, Professional & DIY Advice Shut off valve leaking Aug 24, 2014
Plumbing Forum, Professional & DIY Advice Temporary fix for ball valve leaking since handle sheared off? Dec 14, 2013
Plumbing Forum, Professional & DIY Advice Water heater pressure valve leaking. 5 year old heater. Home Cheapo Strikes again. Mar 25, 2013
Plumbing Forum, Professional & DIY Advice Exterior Faucet Shut Off Valve Leaking Apr 26, 2012
Plumbing Forum, Professional & DIY Advice Saddle Valve leaking Feb 15, 2012

Share This Page