(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 6 of 6

Thread: Cast Iron & Galvanized Pipe Rusted Connection

  1. #1

    Question Cast Iron & Galvanized Pipe Rusted Connection

    Could somebody offer a suggestion on removing a galvanized nipple to a rusted cast iron P trap for a bath tub. Drain system is under a concrete slab. I intend to replace the tub due to corrosion & rust.Is it also possible that the threads on the trap are gone due to corrosion that makes reconnection w/
    new pipe impossible?

  2. #2
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    Squirt it repeatedly with PB Blaster penetrating oil, for about 2 days. You will need a 24" pipe wrench minimum. You still might break something.

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,633

    Default pipe

    How large a hole will he have to make in the slab to get, and turn, a 24" wrench? And what are the chances the trap will snap if he uses that much torque? Cut the nipple out with a SawZall. If you cannot figure out how to do it, call a plumber who does. Your thread in the trap is probably still good. IF not the nipple would have just pulled out or turned easily.

  4. #4

    Smile

    HJ, JIMBO
    I appreciate your help & thanks.Will pre heating the connection w/ propane
    torch help loosen fittings & where could I get the PB blaster penetrating oil
    since this is my first time hearing this type of oil. I know of WD40.
    Thanks again.

  5. #5
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    PB blaster is pretty common. WD40 helps, but is not a true penetrating oil, although it is often used as such.

    Heat on the trap might help, but hj's point about just cutting it and joining new with banded couplings makes sense also.

  6. #6
    In the Trades Gary Swart's Avatar
    Join Date
    Sep 2004
    Location
    Yakima WA
    Posts
    7,246

    Default

    PB Blaster is available at most hardware stores. It is better at penetrating than WD 40, but I concur with the suggestion about the recip saw and banded coupler option being the better option.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •