House of Rohl 1/2″ Thermostatic & Pressure Balance Rough-in Valve with Up to 5 Functions Unfinished R45-EX

The House of Rohl R45-EX 1/2″ Thermostatic & Pressure Balance Rough-in Valve with Up to 5 Functions is engineered to provide exceptional shower performance while simplifying installation for premium residential bathrooms. Designed for custom shower applications, this concealed rough-in valve combines advanced temperature control, volume management, and multi-function operation within a single durable assembly, making it an ideal foundation for luxurious shower experiences.

Unlike conventional valve systems that require separate thermostatic valves, pressure balance valves, shut-offs, and diverters, the R45-EX integrates these essential functions into one compact solution. This innovative design minimizes plumbing complexity, reduces wall clutter, and allows for a cleaner, more refined shower aesthetic. Whether you’re renovating a master ensuite or building a luxury bathroom from the ground up, this valve streamlines installation while maintaining premium functionality.

A key advantage of the R45-EX is its combination of thermostatic and pressure balance technologies. The thermostatic control maintains your desired water temperature with remarkable accuracy, while pressure balance protection helps minimize sudden temperature changes caused by water usage elsewhere in the home. The convenient temperature memory feature remembers your preferred setting, allowing you to enjoy a comfortable shower every time without constant adjustments.

Designed for versatile shower configurations, this rough-in valve supports up to five individual shower functions, enabling three separate outlets with the ability to operate two simultaneously. This flexibility makes it an excellent choice for spa-inspired shower systems featuring rainfall showerheads, handshowers, body sprays, or other luxury shower components. With a generous flow rate of 6.3 GPM (24.9 LPM) at 60 PSI, the valve delivers the water volume needed for a powerful and immersive showering experience.

Installation and long-term maintenance are equally well considered. The valve features a recommended 1/2″ NPT inlet connection for compatibility with standard plumbing systems. An integrated service stop allows plumbers or homeowners to service the valve without shutting off the water supply to the entire home, reducing maintenance time and inconvenience. Additionally, the included test cap enables installers to pressure-test plumbing connections before the cartridge is installed, helping protect internal components during construction.

Constructed from solid brass, the R45-EX offers outstanding durability, corrosion resistance, and dependable long-term performance. Its unfinished exterior is designed for concealed installation behind the finished wall, ensuring only the selected trim remains visible. The valve is fully compatible with Perrin & Rowe®, Riobel®, and ROHL® trim collections ending in -45 for shared functionality and -47 for non-shared functionality (trim sold separately), providing exceptional flexibility when designing a personalized shower system.

Backed by a limited lifetime warranty, the House of Rohl R45-EX delivers professional-grade reliability, innovative engineering, and lasting value. For homeowners, designers, and contractors across Canada seeking a premium rough-in valve that supports sophisticated multi-function shower systems, the R45-EX is a dependable choice that combines performance, convenience, and timeless quality.