Old 1 3/8" Bathroom Drain

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by Marty 1, Mar 8, 2008.

  1. Marty 1

    Marty 1 New Member

    Messages:
    34
    Hi: All my old bathroom sinks have a 1 3/8" drain tailpiece. One needs replacement, but I can't find anything other than 1 1/4" tailpieces. Plus, the overflow holes don't match up. Does anyone have 1 3/8" tailpieces? Why did they change to the smaller size over the years? Thanks--Marty 1
    :confused:
  2. jdoll42

    jdoll42 Computer Systems Engineer

    Messages:
    68
    Location:
    In Illinois near St. Louis, MO
    Are you measuring the inside diameter or outside diameter?
  3. fernco couplings

    the easy way to get yourself out of troubles
    is to go get a 1 1/4 fernco coupling and simply
    adapt that to the antique pipe you are fighting with..

    the fernco will squeeze down fine
  4. RioHyde

    RioHyde Plumber

    Messages:
    339
    Location:
    Cincinnati, Ohio
    I believe you're looking at an 1-1/4" tailpiece not an 1-3/8". These are measured on the inside diameter, not the outside. I've never heard of an 1-3/8" tailpiece, but who knows....maybe 100 years or so ago there were such animals???
  5. krow

    krow Plumber

    Messages:
    906
    Location:
    Ontario, Canada
    No such thing........... never was ......... never will be

    1 1/4" is what you are looking at
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,529
    Location:
    Cave Creek, Arizona
    tailpiece

    They ARE measured by the o.d., not the i.d. American Standard used a reducing tailpiece which was like a funnel. A larger thread and a 1 1/4" o.d. trap connection. A conventional pop-up drain should fit the sink but if you just need the tailpiece a good plumbing supply store will have a 1 3/8" threaded tube which is usually used for leg style bathtubs.
  7. Marty 1

    Marty 1 New Member

    Messages:
    34
    Hi: If I measure across the opening inside the sink at the drain, it is 1 3/8". Directly under the sink, the drain measures 1 5/8" (O.D) then it narrows down. Marty
  8. RioHyde

    RioHyde Plumber

    Messages:
    339
    Location:
    Cincinnati, Ohio
    I've learned something new....the day hasn't been a total waste. lmao
  9. plumbernj

    plumbernj In the Trades

    Messages:
    27
    Location:
    New Jersey
    They sure do make that size. I stock it in my truck.
    I mainly need it on old bathtub drains. 1 3/8"
  10. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    You do not measure the sink hole to determine what size you need. A standard 1 1/4" lav drain should fit fine. The 1 5/8" you mention is a 1½" sch. 40 trap. You would use a 1½" X 1 1/4" trap adapter if you are looking at a bare ( glue up ) hub. If it it threaded, with a nut, you just need a 1½ X 1 1/4 reducing slip joint washer.
  11. Marty 1

    Marty 1 New Member

    Messages:
    34
    Hi: Thanks to everyone for they're responces. Marty :)
  12. Marty 1

    Marty 1 New Member

    Messages:
    34
    I'll keep looking for that 1 3/8" drain. Thanks again--Marty.
  13. call around and find an old style tub drain

    Probably the only way I know of to get your hands on
    some 1 3/8 drain pipe is to buy an old style tub drain kit
    for a claw foot tub.....

    it would come with 2 1 3/8 nipples about 6 inches long and
    it would come with an over flow pipe about 14 inches long

    thats about the only way I have ever come across that size pipe, was for the complete tub drain replacement box.
  14. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,529
    Location:
    Cave Creek, Arizona
    1 3/8

    You aren't buying your tubes at the right store.
  15. krow

    krow Plumber

    Messages:
    906
    Location:
    Ontario, Canada
    I'm going to be extremely surprised and shocked if you find such a pipe and fittings:eek:

    The only thing that comes remotely close to this od size, is tubular tubing (very light gauge and thin walled) If you ever find it, I want to know who sold it to you.
  16. GrumpyPlumber

    GrumpyPlumber Licensed Grump

    Messages:
    1,404
    Location:
    Licensed Grump
    1-3/8" tub drains are very common in some older area's.
    There IS a such thing...using no-hub adapters is the easiest way to secure them.
    Be VERY careful, 1-3/8" drains are usually old and frail...too much force or movement can create hidden leaks.
  17. bombjay

    bombjay New Member

    Messages:
    62
    Grumpy is right! Older parts of the city this is plenty common.I carr 1 3/8
    nuts and o rings to relace any washers...yes.I found 1 3/8 nuts and no washers!
  18. patrick88

    patrick88 Plumber

    Messages:
    836
    Location:
    Webster Ma.
    I don't find it worth the time to chase for parts that are that old. I tend to let the customer know this. Every year it get harder to find the older stuff. This might be a good sign for an upgrade.
  19. mattbee24

    mattbee24 In the Trades

    Messages:
    100
    Location:
    Fremont, OH
    Dearborn Brass makes an 1-3/8 x 12 tailpiece threaded both ends. We have them in stock here. That being said, I have never seen one used on a lavy sink. They are for clawfoot tub drains. Every single lavy drain I have ever seen is 1-1/4 (o.d.). They also make a reducing tailpiece like HJ said. It has 1-1/2 threads and reduces down to a standard 1-1/4 tube. The threads on an 1-1/2 x 1-1/4 tailpiece do measure slightly smaller than 1-1/2 o.d. Maybe this is what you have.
  20. Marty 1

    Marty 1 New Member

    Messages:
    34
    Hi: Thanks to all of you for your input. I'm not sure if everyone understands the part I'm having trouble with. Here's the deal: I have two identical 1948 Crane wall-mounted bathroom sinks. One has its original drain, so I know what it looks like and its size. The other sink has a replacement drain that was bought at an Ace store. The Ace drain is 1 1/4", and it fits, and it's in use right now. But the problem is that it's so small it doesn't seat properly in the bottom of the sink, and it tends to leak. The original drain in the other sink is much larger, and it comes up further and causes no problems. I want a drain like the original, and I think the size is 1 3/8". Does that clear up what I'm looking for? Marty
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