--- product_id: 417871628 title: "ITD35 Freestanding Bathtub Rough-in Kit Brass Tail Pipe and ABS Plastic Adapter" brand: "os&b" price: "$393.59" currency: USD in_stock: true url: https://www.desertcart.us/products/417871628-itd35-freestanding-bathtub-rough-in-kit-brass-tail-pipe-abs store_origin: US region: United States of America --- # Durable brass tailpieces included ABS adapter compatible with waterproof membranes Precision fit for 8"/10" joist spacing ITD35 Freestanding Bathtub Rough-in Kit Brass Tail Pipe and ABS Plastic Adapter **Brand:** os&b **Price:** $393.59 **Availability:** ✅ In Stock ## Summary > 🛁 Upgrade your bathroom install game—effortless, durable, and built to last! ## Quick Answers - **What is this?** ITD35 Freestanding Bathtub Rough-in Kit Brass Tail Pipe and ABS Plastic Adapter by os&b - **How much does it cost?** $393.59 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/417871628-itd35-freestanding-bathtub-rough-in-kit-brass-tail-pipe-abs) ## Best For - os&b enthusiasts ## Why This Product - Trusted os&b brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Compatibility:** Works seamlessly with all freestanding and standard bathtubs - • **Debris-Proof Installation:** Protective film keeps rough-in opening clean during construction - • **Lifetime Warranty Assurance:** Confidence backed by a lifetime warranty for peace of mind - • **Robust Brass & ABS Construction:** Combines corrosion-resistant brass with durable ABS for longevity - • **Effortless Freestanding Tub Setup:** Install before tiling to save time and avoid costly rework ## Overview The OS&B ITD35 Freestanding Bathtub Rough-in Kit streamlines bathtub installation with a precision-fit design for 8"/10" joist spaces, featuring corrosion-resistant brass tailpieces and a durable ABS waste/overflow adapter. Designed for pre-tile installation, it includes a protective film to prevent debris ingress and supports waterproof membrane integration. Backed by a lifetime warranty, this kit ensures a hassle-free, professional-grade setup for all freestanding tubs. ## Description Install a freestanding bath tub in minutes with the island tub drain. No muss, no fuss, no kidding. Works with all freestanding bathtubs and standard bathtubs. Makes installation easier saves time and money during install. Protected by a lifetime warranty ## Features - ITD35 is a Freestanding tub rough-in kit (install before tile installation) - Designed to be installed in an 8"/10" joist space with 1-1/2"/2" p-trap respectively - Includes: island drain assembly with 1-1/2 inch DWV ABS tailpiece, cutting template & protective Film over opening keeps out debris during rough-in stage and - Supplied with brass tailpieces (threaded and flanged) and ABS waste/overflow adaptor kit - Can be installed with waterproofing membrane ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Thompson Traders, Inc. | | Part Number | ITD35 | | Product Dimensions | 23.83 x 23.83 x 10.49 cm; 930 g | | Item model number | ITD35 | | Size | SINGLE | | Colour | Red & Black | | Style | ITD35 - ABS | | Finish | ABS | | Material | Acrylonitrile Butadiene Styrene (ABS) | | Shape | Round | | Installation method | Freestanding | | Item Package Quantity | 1 | | Included Components | Rough-in Kit | | Batteries included? | No | | Batteries Required? | No | | Item Weight | 930 g | ## Images ![ITD35 Freestanding Bathtub Rough-in Kit Brass Tail Pipe and ABS Plastic Adapter - Image 1](https://m.media-amazon.com/images/I/61XZuFB+e3L.jpg) ## Available Options This product comes in different **Style Name** options. ## Questions & Answers **Q: What diameter is top mount where screws go in?** A: That’s a good question. I can’t remember the exact measurement but it’s somewhere around 10 inches. **Q: Will this work with 2” abs p-trap? States 1-1/2”/2” respectively in description, but want to be certain** A: I used a 2” abs p-trap. No issues there. The hard part came when I selected a tub drain, which came with a perfect reducer for the threaded brass tail pipe ( as shown in picture). The reducer was plastic, and I wanted brass. The tub drain manufacturer would not replace nor sell me a brass replacement, so I ordered one from a third party. The ITD35 was easy to install, and suits my needs perfectly. Just be careful choosing a tub drain. **Q: If I am laying cement board in between the plywood floor and tiles, do I screw the rough in to the plywood or the cement board?** A: I believe the directions with the product say to screw the rough in to the plywood. Mine is on the plywood, found that flat roofing nails caused less issues with the cement board layer than screws. **Q: If the p-trap gets backed up, will the seal prevent leakage? I am nervous of the slip in connection and a few years worth of time.** A: Good afternoon, that is a valid question, although should be directed toward the manufacture. Most issues in a tub are due to hair clogs and generally are limited to the strainer in the tub, not the ptrap. You should recognize the symptoms of a pending clog well in advance of a backup. . You should never get to this point, having two daughters with princess hair forces me to be proactive and remove the hair buildup. Regardless, and in my opinion, the seal in the slip connection is tight, although would not prevent leakage if pressure where present ## Frequently Bought Together - OS&B ITD35 ABS Island Tub Drain Rough-in for Freestanding Bathtub, Simplifies Installation, Water, Air, and Smoke Testable Tub Drain, Designed for 8"/10" Joist Space, Plumbing Supplies - DURATECH Inside Pipe Cutter with 2 Replaced Blades, for PVC and Plastic Pipe --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/417871628-itd35-freestanding-bathtub-rough-in-kit-brass-tail-pipe-abs](https://www.desertcart.us/products/417871628-itd35-freestanding-bathtub-rough-in-kit-brass-tail-pipe-abs) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-18*