The Watts 1170-US Thermostatic Mixing Valve (SKU 0559103) is a high-quality 3/4″ mixing valve engineered to deliver consistent, accurately blended hot water in hydronic heating and domestic hot water systems. Designed for commercial and residential applications, this valve precisely controls outlet water temperature across a wide operating range of 90°F to 160°F, protecting against scalding while maintaining system efficiency.
Built to Watts’ exacting standards, the 1170-US series offers dependable performance in demanding environments, making it a trusted choice for plumbing professionals, HVAC contractors, and hydronic system designers.
Key Features
- 3/4″ valve size for versatile system integration
- Wide temperature operating range: 90°F to 160°F
- Thermostatic mixing action for precise outlet temperature control
- Suitable for domestic hot water and hydronic heating applications
- Engineered to Watts’ high-quality manufacturing standards
- Helps protect against scalding and thermal shock
Specifications
- Brand: Watts
- Model: 1170-US
- SKU: 0559103
- Connection Size: 3/4″
- Temperature Range: 90°F – 160°F
- Valve Type: Thermostatic Mixing Valve
Applications
- Domestic hot water systems
- Hydronic heating systems
- Commercial and residential plumbing
- Point-of-use and point-of-distribution hot water blending








