(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 5 of 5

Thread: Tape / dope on braided supply lines?

  1. #1
    DIY Senior Member DavidTu's Avatar
    Join Date
    Dec 2009
    Location
    Seattle, WA
    Posts
    229

    Default Tape / dope on braided supply lines?

    I thought I'd seen on the forum to NOT put pipe dope and/or plumbers tape on braided supply line connections... but now I don't find the reference. In any case... do these connections take dope or tape? My faucet instructions call for it but I've installed them w/o leaks and without tape or dope previously.

    What is best practice on this?
    Last edited by Terry; 03-14-2014 at 05:20 PM.

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,675

    Default

    Many of the braided hoses now have O-ring seals and as such don't need to be doped. If they use a metal to metal seal, a little pipe dope is fine but I would never use tape. IMHO tape is for sealing threads and on those hoses the threads don't do the sealing.

  3. #3
    DIY Senior Member dlarrivee's Avatar
    Join Date
    Jun 2009
    Location
    Canada
    Posts
    1,172

    Default

    If it's a compression fitting, you don't use tape or dope.

    The compression ring/ferrule seals the joint, over tightening is also bad news.

    Tape and dope are for TAPERED threads, where the threads do the sealing.

  4. #4
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    Braided supply lines normally have a rubber gasket seal...tape would intefere. Some brands use a 'bullnose' which simulates an actual compression ring. It is for metal-to-metal seal, and again, NOT tape or dope

  5. #5
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,675

    Default

    Quote Originally Posted by jimbo View Post
    Some brands use a 'bullnose' which simulates an actual compression ring. It is for metal-to-metal seal, and again, NOT tape or dope
    THe problem with the bullnose is that it is of a much harder metal and so does not truly simulate a compression ring, which as the name implies, compresses to seal not only against the tube but also against the machined tapers. Any imperfection in the machined faces can cause a leak.

    And yet plumbers install them all the time without dope
    Last edited by Terry; 10-02-2011 at 01:22 AM.

Similar Threads

  1. Recommendations on lav faucets that don't use braided supply lines?
    By Kimster in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 6
    Last Post: 07-30-2011, 09:07 PM
  2. Supply lines for water heater: Braided ones
    By ron in sc in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 03-02-2008, 02:49 PM
  3. Can I use solder instead of tape or dope?
    By jhighley in forum Shower & bathtub Forum & Blog
    Replies: 1
    Last Post: 02-16-2007, 02:41 PM
  4. Pipe Dope vs. Teflon Tape
    By jamckelvey in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 05-22-2006, 12:34 PM
  5. Pipe Dope On Teflon Tape?
    By PhilUpNorth in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 18
    Last Post: 10-19-2005, 09:17 PM

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
  •