OS&B ITD35 Two Piece ABS Tub Drain Kit & Rough-In – Easy Install for 8/10 Joist Spaces

OS&B ITD35 Tub Drain Kit & Rough-In

When remodeling a bathroom with tight spaces, every choice matters. The OS&B ITD35 Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In is designed to simplify installation while delivering dependable functionality. This compact, low-profile system helps you position a freestanding tub where space is at a premium, so your project can move forward without compromising on look or performance.

With a focus on practicality and durability, the kit integrates a PVC body and an epoxy-coated 18-gauge deck flange. The asymmetrical deck plate is purpose-built to avoid interference with freestanding faucet rough-ins, making it feasible to work in 8" or 10" joist spaces and to install before tiling. The design accommodates common plumbing configurations, including a 1-1/2" or 2" P-trap or slab-on-grade construction, helping you plan for either a finished floor or access beneath the fixture as needed.

Installation can be verified on the job thanks to the testable design. A snap-off test cap rated to 30 psi supports water, air, and smoke testing, allowing you to check the rough-in before tiling proceeds. The 2" DWV hub connection pairs with thinnest-locking holes on the deck flange, ensuring a secure, reliable fit as the project progresses.

What makes this kit stand out is its completeness and ease of use. You get a full tub drain solution that pairs with components tailored for tile-friendly installations, including a flanged brass tailpiece, a PVC adapter kit, a 2" x 1-1/2" PVC reducing bushing, a mortar/tile guard, an island drain assembly, and a cutting template for the rough-in. This means you can plan ahead, mark the rough-in with confidence, and install before final finishes are in place.

Two helpful bullet sections to guide planning

• Compact, install-before-tiling flexibility: Fit in 8"/10" joist spaces, define tub location at rough-in, and tile around the finished deck later.
• Testable, durable design: The test cap supports water, air, and smoke tests, and the deck flange locks even in thinner finishes.

• What’s included: Island drain assembly, flanged brass tailpiece, PVC adapter kit, reducing bushing, tile guard, and a rough-in cutting template.
• Versatile compatibility: Works with standard 1-1/2" or 2" P-traps and is suitable for slab-on-grade or wooden subfloor installations.