House of Rohl 1/2″ Pressure Balance Rough-in Valve with 1 Function Unfinished R51

The House of Rohl 1/2″ Pressure Balance Rough-in Valve with 1 Function (R51) is engineered to provide dependable water temperature control, exceptional durability, and seamless compatibility with premium bathroom trim collections. Designed for homeowners, builders, and professional installers seeking long-lasting performance, this rough-in valve serves as the reliable foundation for a high-end shower or tub/shower system.

Built with an advanced pressure balance mechanism, the valve continuously monitors the ratio of hot and cold water, automatically adjusting the flow to maintain a consistent and comfortable water temperature. This technology helps reduce sudden temperature fluctuations caused by changes in household water demand, enhancing both comfort and safety during every shower.

The valve features one simple control mechanism, making daily operation intuitive while delivering your preferred water volume with precision. It can be installed as a stand-alone shower valve or paired with a showerhead and tub spout when the tub spout includes an integrated diverter, providing flexibility for a variety of bathroom layouts and renovation projects.

Constructed from solid brass, the R51 rough-in valve offers exceptional strength, corrosion resistance, and long-term durability. Its premium brass body is designed to withstand years of everyday use while maintaining dependable performance behind the wall. The unfinished exterior is intended for concealed installation, allowing the visible trim to define the final bathroom aesthetic.

Installation and maintenance are simplified with several professional-grade features. The integrated service stops allow plumbers or homeowners to perform valve maintenance without shutting off the water supply to the entire house, minimizing disruption during servicing. Additionally, the included test cap enables installers to pressure-test plumbing connections before the trim and cartridge are installed, helping protect internal components from construction-related damage.

Designed with performance in mind, the valve delivers an impressive 5.8 GPM (22 LPM) flow rate at 60 PSI, creating a satisfying, immersive shower experience while supporting consistent water delivery. The recommended 1/2-inch NPT inlet connection ensures compatibility with standard plumbing systems, making installation straightforward for new construction and bathroom remodeling projects alike.

The House of Rohl R51 Rough-in Valve is compatible with Perrin & Rowe®, Riobel®, and ROHL® trim kits ending in -51 (sold separately), allowing homeowners to customize their bathroom with a wide selection of luxury trim styles and finishes while maintaining dependable valve performance behind the wall.

Whether you’re building a contemporary ensuite, upgrading a family bathroom, or completing a luxury renovation, the House of Rohl 1/2″ Pressure Balance Rough-in Valve with 1 Function provides the performance, reliability, and installation flexibility expected from a premium plumbing solution. Backed by a limited lifetime warranty, it offers lasting confidence and exceptional value for discerning Canadian homeowners and professionals alike.