Fortis 1/2" Diverter Rough-in Valve – 3-Way, VALVE425

Fortis VALVE425 1/2" Diverter Rough-in Valve is a 3-way diverter rough valve engineered to route water between multiple shower or tub outlets. Designed as the behind-the-wall component for Fortis diverter trims, this valve features 1/2" NPT connections, a ceramic disc cartridge, and a high-flow design that can support complex shower systems. 

With a flow capacity of up to 9.7 GPM at 60 PSI, VALVE425 is ideal for multi-outlet showers where you may want to switch between, or share, functions like a rain head, hand shower, and body sprays. Step-by-step installation instructions and a limited lifetime warranty give installers and homeowners confidence that the valve will perform reliably for years. 

Key features

• 3-way diverter: rough-in body designed as a three-way diverter to distribute water to multiple outlets (when paired with compatible 3-way diverter trim). 
• High-flow performance: flows up to 9.7 GPM at 60 PSI, suitable for multi-outlet custom showers when properly balanced. 
• 1/2" NPT connections: standard 1/2" NPT inlets/outlets for straightforward connection to typical copper, PEX, or CPVC plumbing with appropriate fittings. 
• Ceramic disc valve: ceramic disc cartridge for smooth operation and long-term reliability. 
• Rough-in only: valve body only; decorative trim and handle are ordered separately to match your chosen Fortis style. 
• Step-by-step installation: included instructions guide rough depth, orientation, and testing for an easier install. 
• Limited lifetime warranty: mechanical and finish coverage for residential use (time-limited for commercial). 

Specifications

• Model: VALVE425 – 1/2" diverter rough-in valve. 
• Type: 3-way diverter valve (rough-in body). 
• Connections: 1/2" NPT. 
• Flow rate: 9.7 GPM @ 60 PSI (approx.). 
• Cartridge: ceramic disc. 
• Standards: rough-in valve only; designed for use with compatible Fortis diverter trims. 
• Certifications: NSF lead-free certified, CEC compliant, CALGreen compliant, EPA WaterSense (for paired trims/faucets), CSA compliant, ADA compliant (with applicable trim). 

Construction & benefits

• Lead-free construction: NSF certification confirms compliance with US lead-free requirements for potable water products. 
• Energy & water codes: designed to meet CEC and CALGreen requirements when installed with compatible low-flow trims and outlets. 
• Reliable operation: ceramic disc technology provides smooth handle feel (with trim) and helps minimize leaks over time. 
• Flexible shower design: supports sophisticated showers that divert between multiple outlets or share functions, depending on the trim used. 

Downloads

• Specifications Data Sheet (PDF)
• Care Instructions (PDF)

Warranty

• Mechanical warranty: limited lifetime warranty on mechanical parts for the original residential purchaser; 1-year for commercial installations. 
• Finish warranty: limited lifetime warranty on finishes for residential use; 1-year for commercial applications. 
• See Fortis warranty policy for full details, exclusions, and how to obtain service. 

Frequently asked questions

What does the VALVE425 rough-in valve include?

VALVE425 includes the 1/2" 3-way diverter rough valve with ceramic disc cartridge and installation information. Decorative trim, including handle and escutcheon, must be purchased separately. 

Can this valve be used to control more than one shower outlet?

Yes. VALVE425 is designed as a 3-way diverter that can be used to route water to multiple outlets, such as a main shower head, hand shower, or tub spout, depending on your plumbing layout and chosen trim. 

What piping connections do I need for this diverter?

The valve uses 1/2" NPT connections for inlets and outlets, which can be adapted to copper, PEX, or CPVC piping using appropriate fittings and local plumbing practices. ]

Which trims work with VALVE425?

Fortis diverter trims that state “for use with VALVE425” or list VALVE425 as the matching rough valve, including certain Industrial and Doccia 3-way diverter trim kits. Always verify trim documentation before ordering.