Tub Drain

Island Tub Drain (Testable Rough-in)

Install a Freestanding Bath Tub in minutes.

No muss. No fuss. And now Testable featuring a snap off Test Cap!

No kidding.

Your job just got easier.

Tub Drain
tub drain, tub seal, reducing bushing, tailpiece, rubber seal


Now Island Tub Drain features a snap off Test Cap.  Grip the centre Tab with a pair of Channel Locks and rock back and forth until removed.  The Test Cap also keeps dirt and debris out of the Drain during rough-in.

Then, attach the correct Tailpiece (supplied) or Adaptor Kit (also supplied) to the bath drain and lower the tub into the specially designed rubber seal.

Need to remove the tub? No problem! Simply lift and remove.

Installation Video

“Now I can install my tub at the Trim stage rather than the Rough-in stage – no more damaged tubs… My tiler is happy because he can even run his tiles under the tub rather than having to cut around – huge time saver!”


  • 18 Gauge Epoxy coated Metal Deck Flange
  • Snap off Test Cap
  • ITD35 is a Freestanding Tub rough-in (install before tile installation)
  • Designed to be installed in an 8”/10” joist space
  • Can be installed with Waterproofing Membrane (*bronte™ NobleSeal TS Recommended)


  • 2 x Brass Tailpieces (Fine Thread and Flanged)
  • ABS or PVC Adapter Kit (attaches Island Tub Drain to ABS or PVC Bath Wastes)
  • Island Drain assembly with 1-1/2” DWV ABS Tailpiece
  • 2” x 1-1/2” ABS Reducing Bushing
  • Cutting template
Island Tub Drain Sideview Rendering Island Tub Drain Fine Thread Tailpiece Island Tub Drain Flanged Tailpiece Island Tub Drain ABS Adapter Kit

Fine Thread Tailpiece

Attaches to 314 Series Direct/Offset Bath Wastes.

Flanged Tailpiece

Attaches to 314DC Series Cable-Drive® Bath Wastes.

ABS Adapter Kit

Attaches to ABS Bath Wastes and includes Brass Nut and Poly Washer.

Installation Tips

  • Use 6.5” hole saw to cut sub floor (not included). Cutting template included
  • Secure Deck Flange with 6 screws (not included)
  • Do not cut the brass Tailpiece as this may cause a leak



Product Literature

Freestanding Bath Tub Drain, Island Tub Drain Freestanding Bath Tub Drain, Island Tub Drain ITD35, ITD5135 ID357 Cast Iron Island Tub Drain LBITD Testable Island Tub Drain


OS&B™ is a Registered Trademark of Oakville Stamping and Bending Ltd.

ITD35 is Patent Pending.

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