---
product_id: 25509747
title: "OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8\"/10\" Joist Spaces & Tight Bathrooms"
brand: "os&b"
price: "€ 140.54"
currency: EUR
in_stock: true
reviews_count: 13
category: "Os&B"
url: https://www.desertcart.ie/products/25509747-os-and-b-itd35-two-piece-abs-pipe-freestanding-tub
store_origin: IE
region: Ireland
---

# Water, air & smoke testable up to 30 psi Fits tight 8"/10" joist spaces perfectly Two-piece ABS for durable, leak-proof fit OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8"/10" Joist Spaces & Tight Bathrooms

**Brand:** os&b
**Price:** € 140.54
**Availability:** ✅ In Stock

## Summary

> 🚿 Upgrade your bathroom game with the OS&B ITD35—where smart design meets flawless function!

## Quick Answers

- **What is this?** OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8"/10" Joist Spaces & Tight Bathrooms by os&b
- **How much does it cost?** € 140.54 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/25509747-os-and-b-itd35-two-piece-abs-pipe-freestanding-tub)

## 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

- • **Built to Endure:** Robust ABS construction ensures long-lasting durability and leak resistance.
- • **Tested & Trusted:** Snap-off test cap supports water, air, and smoke testing up to 30 psi for peace of mind.
- • **Space-Savvy Design:** Asymmetrical low-profile deck plate fits tight bathrooms and freestanding faucets with ease.
- • **All-In-One Solution:** Includes brass tailpiece, PVC adapters, tile guard, and cutting template—everything you need in one box.
- • **Effortless Installation:** Complete kit with all components for a seamless setup—no plumber’s nightmare here.

## Overview

The OS&B ITD35 is a two-piece ABS freestanding tub drain kit engineered for easy installation in tight 8"/10" joist spaces. Featuring an asymmetrical low-profile deck plate, it avoids interference with freestanding faucets and supports slab or wooden subfloor construction. Built tough with ABS material, it includes a snap-off test cap rated for water, air, and smoke testing up to 30 psi. The comprehensive kit comes with brass tailpiece, PVC adapters, and a tile guard, making it the go-to solution for professional-grade bathtub drain installations.

## Description

OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8"/10" Joist Spaces & Tight Bathrooms - desertcart.com

Review: Very smart! - This is a very smart, effective and efficient way to install a vessel tub. I'd use this product again!
Review: Worth the money - We had a customer who bought a fiberglass free standing tub. When we opened it, the tub came with flexible tube that connected to the tub. I did not want to depend on a slip compression joint to hold back any water. So I bought this hoping it would make my life easier. Install was easy. Breaking the tab to get to drain was a little nerve wracking. I had read a lot of reviews that said it broke off, couldn't remove, damaged gasket. I took my time. I used lineman pliers to get it out. I just went slow and wiggled for about 1 minute and it snapped right out. I did have a few little pieces aroind the edge that I thought could damage the gasket. I took my utility knife and just scraped those off. Put the included drain tail piece on the tub, put the plumbers grease on the pipe and slid the tub down. It worked great! Totally worth the money if you cannot access the plumbing from below. I will buy this again.

## Features

- EASY INSTALLATION: Make bathroom remodels simpler with the Two Piece PVC Island Tub Drain Rough-in from OS&B. Supplied with all the necessary components to ensure seamless installation, it is the perfect combination of convenience and functionality.
- LOW-PROFILE DESIGN: Crafted with an asymmetrical deck plate, this tub drain kit will not interfere with a freestanding faucet rough-in. Easier installation in tight areas or small bathrooms: install in an 8"/10" joist space with a 1-1/2"/2" P-trap or slab on grade construction or wooden sub flooring.
- BUILT TO LAST: The tub drain kit features a PVC body for durability. Enabling the freestanding tub location to be defined at rough-in (install before tiling), it allows for tub fitting over a finished floor (access below the fixture is not needed).
- TESTABLE DESIGN: Built with a snap-off test cap (rated to 30 psi), it enables water, air, and smoke testing. The bathtub drain has a 2" DWV hub connection, while the epoxy-coated, 18-gauge metal deck flange features holes to lock in thinnest.
- FULL BATHTUB DRAIN KIT: This tub drain kit includes a flanged brass tailpiece, a PVC adapter kit (that helps attach to PVC bath wastes), 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B016M16DTC |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #69,863 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #108 in Bathtub Drains |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,499) |
| Date First Available | October 12, 2015 |
| Finish | ABS |
| Included Components | Rough-in Kit |
| Installation Method | Freestanding |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 2.05 pounds |
| Item model number | ITD35 |
| Manufacturer | Oakville Stamping and Bending Ltd. |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Part Number | ITD35 |
| Product Dimensions | 9.38 x 9.38 x 4.13 inches |
| Style | ITD35 - ABS |

## Images

![OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8"/10" Joist Spaces & Tight Bathrooms - Image 1](https://m.media-amazon.com/images/I/41-6d-lTiPL.jpg)
![OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8"/10" Joist Spaces & Tight Bathrooms - Image 2](https://m.media-amazon.com/images/I/411duEtkOUL.jpg)
![OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8"/10" Joist Spaces & Tight Bathrooms - Image 3](https://m.media-amazon.com/images/I/413T4f+5zlL.jpg)
![OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8"/10" Joist Spaces & Tight Bathrooms - Image 4](https://m.media-amazon.com/images/I/41qIqtBiYQL.jpg)
![OS&B ITD35 - Two Piece ABS Pipe Freestanding Tub Drain Kit & Rough-In - Easy Installation, Asymmetrical Deck Plate, Water, Air, & Smoke Testable - Designed for 8"/10" Joist Spaces & Tight Bathrooms - Image 5](https://m.media-amazon.com/images/I/41uuCFZIp-L.jpg)

## Available Options

This product comes in different **Style** 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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very smart!
*by A***Y on August 29, 2025*

This is a very smart, effective and efficient way to install a vessel tub. I'd use this product again!

### ⭐⭐⭐⭐⭐ Worth the money
*by M***S on February 6, 2021*

We had a customer who bought a fiberglass free standing tub. When we opened it, the tub came with flexible tube that connected to the tub. I did not want to depend on a slip compression joint to hold back any water. So I bought this hoping it would make my life easier. Install was easy. Breaking the tab to get to drain was a little nerve wracking. I had read a lot of reviews that said it broke off, couldn't remove, damaged gasket. I took my time. I used lineman pliers to get it out. I just went slow and wiggled for about 1 minute and it snapped right out. I did have a few little pieces aroind the edge that I thought could damage the gasket. I took my utility knife and just scraped those off. Put the included drain tail piece on the tub, put the plumbers grease on the pipe and slid the tub down. It worked great! Totally worth the money if you cannot access the plumbing from below. I will buy this again.

### ⭐⭐⭐⭐⭐ Great Quality and Worth the money!
*by L***O on November 28, 2025*

This is a must have item for free standing tub. Solve my headache! Easy to use and great quality. Cost a little but totally worth it.

## 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

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-20*