Holby Tempering Valves

Holby Tempering Valves for Water Heaters & Hot Water Systems

Holby tempering valves deliver code-compliant, automatic temperature control for residential and light commercial applications. These professional-grade valves mix hot and cold water to maintain safe outlet temperatures (typically 104–122°F) while protecting against scalding.

Built with durable brass construction and engineered to ASSE 1017 and ASSE 1070 standards, Holby valves are trusted by plumbing contractors, HVAC installers, and facility maintenance teams for reliable performance and easy installation.

Whether you're regulating a water heater, protecting fixture outlets, or managing a commercial hot water system, Holby provides the temperature control precision your plumbing system needs—with the simplicity contractors and DIYers expect. Available in multiple sizes with fast shipping on most orders over $99. Need guidance on sizing or installation? Call our experts at 844-669-4330 for personalized support on your project. Explore related water heater parts and mixing valve options to round out your system.