Master Thermostatic Mixing Valve, High‑Low, 1 Inch Inlet 1-1/4 Inch Outlet NPT Connections, 26-88 GPM, 90–180°F, Navigator

This high‑low thermostatic mixing valve is engineered to deliver precise and dependable temperature control in commercial hot‑water distribution systems. Designed to maintain stable output temperatures during both high‑ and low‑demand periods, the valve supports facility safety, efficiency, and consistent user comfort. A powerful liquid‑filled thermostat provides accurate regulation and is backed by long‑term durability, helping ensure reliable performance in heavy‑use environments.

With flow capacities reaching up to 88 gallons per minute, depending on pressure drop, the valve is capable of supporting large multi‑fixture systems. It features integral strainer checkstops on the inlets and a positive shutoff mechanism that instantly stops hot‑water flow if the cold supply is lost—an essential safety function in institutional and commercial buildings.

Built for ease of installation, the assembly is factory‑tested, dirt‑ and lime‑resistant, and compatible with universal mounting configurations. Maximum operating pressure is 125 PSI, with a maximum inlet temperature of 180 degrees Fahrenheit. The adjustable set point allows operators to fine‑tune water temperature within the available ranges, ensuring compliance with system requirements and user comfort expectations.

This mixing valve is well‑suited for schools, hospitals, multifamily buildings, recreation centers, and other high‑demand applications. With ASSE 1017, cUPC, CSA, and NSF certifications, it meets strict standards for safety and lead‑free potable water compliance, making it a dependable component for professional plumbing installations.

• 1 Inch Inlet NPT x 1-1/4 Inch Outlet NPT
• Integral strainer checkstops on inlets safeguard system operation.
• Provides accurate temperature control within ±3 degrees Fahrenheit.
• Positive shutoff activates when cold water supply fails to prevent scalding.
• Factory assembled and tested for simplified installation and reliable startup.
• Equipped with a powerful liquid‑filled thermostat for consistent performance.
• Flow ranges from 26 GPM up to 88 GPM, depending on PSI, with a high/low 80 GPM
• High‑low thermostatic mixing valve designed for master hot‑water distribution.
• 90–120°F (standard), 110–140°F (high), maximum inlet temperature of 180 degrees Fahrenheit supports varied installations.
• Maximum operating pressure of 125 PSI ensures compatibility with commercial systems.
• Certified to ASSE 1017, cUPC, CSA, and NSF/ANSI 372 for safety and lead‑free compliance.
• Supports up to 80+ GPM depending on inlet pressure; rated up to 88 GPM at higher pressure drops.