fiberglass modification for new shower faucet in old shower

Discussion in 'Shower & Bathtub Forum & Blog' started by Joseph M, May 1, 2009.

  1. Joseph M

    Joseph M New Member

    Messages:
    1
    I have a cheap fiberglass 1-piece tub/shower surround... about 15 yrs old. still has the cheap builder-grade faucet. I got a great deal on a new faucet and removed the old faucet. I realized that the hole was drilled in the fiberglass prior to install of the surround over the old faucet and the surround hole is smaller than the faucet casing. I have no access to the old faucent and plumbing because of the limited size of the hole in the fiberglass. SO, I have no center hole to use for drilling. How can I cut out the hole to be larger without damaging the wall or pipes? I kind of need to eliminate as much risk as possible so I don't damage the surround and turn this into a big project. I have a jigsaw. Can I just be careful to not cut blindly where the threaded pipe ends are (and soon will be after installed) on the new faucet? that would help me guess where the pipes are and not damage them. Are they all pretty standard pipe locations for tub/shower faucets if it was all installed up to code by the builder?
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,332
    Location:
    New England
  3. kingsotall

    kingsotall Plunger/TurdPuncher

    They sell rotozips on craigslist like they're going out of style too.

    [​IMG]
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,272
    Location:
    Cave Creek, Arizona
    faucet

    If your old faucet has threaded ends and the new one does too, there is little likelihood that you will be able to change it through the opening in the fiberglass surround. That type of installation usually requires a lot more room than that.
  5. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,281
    Location:
    Land of Cheese
    I'm with hj, if you cannot get 2 hands in from either the front or the back, there is no easy way to change the valve.
  6. kingsotall

    kingsotall Plunger/TurdPuncher

    That's what they make TV tray size escutcheons for.
  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,272
    Location:
    Cave Creek, Arizona
    valve

    More to the point is that threaded connections take more room to connect, and may require unions in the lines. Both situations require more space than the opening in the surround would give you.
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