I need to plumb into an existing ABS drain, labelled as "ABS/DWV 1 1/4" schedule 40 ", but for the life of me cant find any 1 1/4" fittings!!!

Photograph of pipe showing labelling

My suspicion is that the pipe is 1 1/4" ID, and I need to buy 1 1/2" OD fittings.

Before I trundle down to Home Depot, is anyone able to confirm my suspicion (or do I have the most useless, redundant piping ever?


  • You may need to trundle down to a plumbing supply place; it's probably an uncommon size. Apr 16, 2018 at 2:33

1 Answer 1


They definitely exist (in Canada at least).

Sample "big box" listing for "abs 1 1/4" :


  • I am sure that ABS DWV Schedule 40 is legal to use where I live, but it does not in fact appear to be used here in new construction. Every new installation I see now in the City of Dallas is PVC schedule 40. The drains in our 47-year-old Fox and Jacobs tract house in Dallas are plumbed in ABS, but I am not aware of any other ABS installations here. Apr 16, 2018 at 10:04
  • Levi, where is this installation of ABS drains? Apr 16, 2018 at 10:20
  • Thanks Jeff - I looked at HD & Lowes, but did not actually check Rona!
    – Levi
    Apr 16, 2018 at 17:54
  • Jim - This install is in Ontario.
    – Levi
    Apr 16, 2018 at 17:55

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