House of Rohl 1/2″ Therm & Pressure Balance Rough-In Valve with Up to 5 Functions Unfinished R45-SPEX

Description

The House of Rohl 1/2″ Therm & Pressure Balance Rough-In Valve with Up to 5 Functions (R45-SPEX) is engineered to provide exceptional shower performance, advanced temperature control, and a streamlined installation process for luxury residential bathrooms. Designed for homeowners, designers, and professional installers, this premium rough-in valve combines innovative functionality with long-lasting durability, making it the ideal foundation for a sophisticated custom shower system.

Unlike traditional shower valve configurations that require multiple components, the R45-SPEX integrates thermostatic and pressure balance technologies into a single valve body. This advanced design delivers consistent water temperature while automatically compensating for pressure fluctuations caused by other household water usage. The result is a safer, more comfortable shower experience with reliable temperature stability every time.

One of the valve’s standout features is its built-in temperature memory. Once your preferred water temperature is set, the valve remembers your selection, allowing you to enjoy a consistent shower experience without constant adjustments. This convenient feature enhances daily comfort while reducing unnecessary water waste.

Designed to simplify installation, the R45-SPEX eliminates the need for separate shut-off or diverter valves. This integrated solution minimizes plumbing complexity, reduces wall clutter, and creates a cleaner, more modern shower design. Supporting up to five individual shower functions, the valve allows three independent outlets while enabling two functions to operate simultaneously, making it perfect for luxury shower systems featuring rain showerheads, handshowers, body sprays, or other premium shower components.

With a high flow rate of 6.3 GPM (24.9 LPM) at 60 PSI, the valve delivers ample water volume for a rich, immersive shower experience, even when multiple outlets are operating together. Its recommended 1/2″ NPT inlet connection ensures compatibility with standard plumbing installations, making it a practical choice for both new construction and bathroom renovation projects.

Constructed from solid brass, the valve offers exceptional strength, corrosion resistance, and long-term reliability. Professional installers will appreciate thoughtful features such as the integrated service stops, which allow maintenance without shutting off the home’s main water supply, and the included test cap, enabling pressure testing before trim installation while protecting the valve cartridge from damage during construction.

The R45-SPEX is compatible with Perrin & Rowe®, Riobel®, and ROHL® trim collections ending in -45 for shared functionality and -47 for non-shared functionality (trim sold separately), offering design flexibility to complement a wide range of premium bathroom styles.

Backed by House of Rohl’s Limited Lifetime Warranty, this rough-in valve delivers dependable performance, installation efficiency, and lasting value. Whether you’re creating a spa-inspired ensuite or upgrading a luxury bathroom in Canada, the House of Rohl R45-SPEX provides the advanced technology, durability, and flexibility needed to build a truly customized shower experience.