Stuck drain valve.

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by MichaelJ, Mar 24, 2013.

  1. MichaelJ

    MichaelJ New Member

    Messages:
    2
    Location:
    New Jersey
    A drain valve on my hydronic heating boiler is completely stuck. The valve does not have a bonnet, the stem seats in a valve body. A gland nut covered some kind of a packing which was like rubber and crumbled easy. The handle end of the stem is broken off. The valve leaks slowly, only a bit faster than evaporation. When I discovered the leak the valve was encrusted with calcium deposit end rust already eaten through the metal wall. I tried to use big wise grip and 12” pipe wrench on the stem without any success. I suspect that even when I unscrew the stem it will be unusable. One reason is broken off handle. To replace the whole valve I’m afraid to do something to thread in cast iron body of the boiler. The valve is installed using some kind of plumber putty that is now hard as a rock. Any advice how to approach this problem? Another question would be how to drain water from the boiler when the drain valve is unoperative?
    Thanks
    Michael J
    IMG_4940.jpg
    Last edited: Mar 24, 2013
  2. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Messages:
    1,143
    Location:
    South*East
    That looks like a water heater not a boiler. If it is a water heater it's time to replace it.

    John
  3. MichaelJ

    MichaelJ New Member

    Messages:
    2
    Location:
    New Jersey
    It is Peerless boiler made probably in 1960 (serial number starts with 60-...), 160k BTU, still going strong, cast iron body.
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,641
    Location:
    Cave Creek, Arizona
    IT is a brass valve into a cast iron boiler. You will NOT do anything to the boiler when you remove the valve using a BIGGER wrench. Turn off the water to the boiler, close the valve to the expansion tank, open the relief/safety valve to remove the pressure, then close it so no air gets into the system. Remove the drain valve and QUICKLY screw the new one in with minimal water leakage.
Similar Threads: Stuck drain
Forum Title Date
Plumbing Forum, Professional & DIY Advice, Tips & Tub Drain plunger separated from linkage, stuck in drain pipe May 2, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Oatey drain plug stuck Mar 23, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Touch Down Drain Stuck Jan 29, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Manual Pop-Up Drain Stuck--Help, please Jan 28, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Bathroom sink pipe fitting stuck in drain stub out - please help! Aug 31, 2013

Share This Page