Compatible with a variety of Heil Quaker furnaces and PGAA

85-inch bolt circle for easy installation

High-Grade Construction: Corrosion-resistant stainless steel prevents scaling and degradation in high-moisture combustion environments

Safe Start Logic: Microprocessor continually analyzes the flame and safety circuit to prevent hazardous startup conditions

This #17 drill size orifice is a standard fit for many intertherm miller mobile home furnaces

Resideo NK300S-100UP Boiler Feed R-407A Compatible with a variety ofThe Resideo NK300S 100UP Boiler Feed Combination Valve is a comprehensive solution for managing closed loop hydronic heating systems. This high performance assembly integrates a pressure reducing valve, a double check backflow preventer with an atmospheric vent, and a 200 micron stainless steel strainer into a single, compact brass body. Engineered for professional contractors, the NK300S 100UP features 1 2 inch union press fittings to accelerate