Freestanding Tub Drain Rough‑In Kit – Bathtub Drain Kit with PVC Adapter and Brass Tail Pipes, Compatible with Freestanding and Floor‑Mounted Tub

GS Design Center Freestanding Tub Drain Rough‑In Kit is a complete bathtub drain kit designed for freestanding, floor‑mounted, and island bathtubs. With a double‑layer embedded drain body, PVC adapter, and high‑strength brass tail pipes, this kit provides a stable, sealed connection that works on wood, cement, tile, and concrete floors.

Engineered as an embedded drainage system, this rough‑in kit installs between the structural subfloor and the finished surface, protecting the pipe connection and helping ensure long‑term sealing performance for your freestanding tub drain.

Key features

• Multi‑scene compatibility: Suitable for freestanding bathtubs, floor bathtubs, and island bathtubs, with stable installation on wooden, cement, tile, and concrete floors.
• Embedded double‑layer structure: Drain body is fixed between the base floor and decorative surface layer to protect the drain opening and maintain seal integrity.
• High‑strength brass tail pipes: Brass pipes provide a stable structure and corrosion resistance in wet environments.
• Built‑in anti‑backflow device: Helps eliminate odor hazards by preventing sewer gases from returning into the bathroom.
• Blue protective cover: Shields the drain opening from construction debris throughout the build, helping keep the system clean until final hook‑up.
• PVC adapter: Allows quick connection between the pre‑embedded drain body and the bathtub drain tailpiece.
• Modular test cover design: Quick‑release test cap supports both water and air pressure sealing tests to verify leak‑free installation.

What’s included

• Drain body (embedded rough‑in base)
• Protective film / cover (blue construction cap)
• PVC adapter
• Fine threaded brass tailpiece
• Flanged brass tailpiece
• Brass nut
• Screws and anchors set
• 2" to 1‑1/2" drainage adapter
• Poly gasket

Design & performance

• Double‑layer embedded design offers physical protection around the pipe entry and improves sealing reliability.
• Brass tail pipes and fittings provide long‑lasting strength and resistance to reaction from water and cleaning chemicals.
• Anti‑backflow features help reduce odors and improve overall drain hygiene for freestanding tubs.
• PVC adapter and modular components simplify alignment, connection, and testing during installation.

Installation & applications

• Designed for use under freestanding, floor‑mounted, island, and copper bathtubs with a vertical drain connection.
• Embedded between structural floor and finished floor for a neat rough‑in that stays hidden once tile or flooring is installed.
• Compatible with 2" and 1‑1/2" drainage lines using the included adapter.
• Suitable for new construction or remodel projects where a freestanding tub is planned and access below the floor may be limited.

Ideal projects

• Bathrooms featuring freestanding tubs on wood, concrete, or tiled floors.
• Island tub installations where drain access from below is difficult.
• Remodels upgrading to a freestanding or copper bathtub and needing a reliable rough‑in drain kit.

Frequently asked questions

What types of tubs is this rough‑in kit compatible with?

This freestanding tub drain rough‑in kit is suitable for most freestanding, floor‑mounted, and island bathtubs, including many copper tubs, as long as they use a standard vertical tailpiece connection.

Can this kit be used on concrete or tiled floors?

Yes. The embedded double‑layer structure is designed to be fixed into wooden, cement, tile, or concrete floors, providing stable support for the tub drain connection.

Does the kit support pressure testing?

The modular PVC adapter and test cover design support water and air pressure sealing tests, allowing you to verify leak‑free connections before closing the floor and setting the tub.

How does the anti‑backflow feature help?

The built‑in anti‑backflow design helps prevent sewer gases from traveling back up through the drain, reducing odors around the freestanding bathtub area.

What is included in the package?

The kit includes the embedded drain body, protective cover, PVC adapter, fine threaded and flanged brass tailpieces, brass nut, screws and anchors, a 2" to 1‑1/2" adapter, and a poly gasket for a complete rough‑in solution.