Armstrong Fluid Technology 216944-300 320788-704 Technicians typically look for cracked

Technicians typically look for cracked ceramic insulation

This Selectra modulation valve is factory-set for high and low fire but allows for field adjustment to match specific BTU requirements

This SPST switch features a durable housing designed to withstand the thermal cycling and vibration common in hydronic heating cabinets

While it uses standard connections

This is a suction line filter-drier and must be installed in the suction line

Armstrong Fluid Technology 216944-300 320788-704 Technicians typically look for crackedThe Armstrong Fluid Technology 216944 300 is a high performance Pressure Water Reducing Valve designed for precision in commercial and residential HVAC hydronic systems. This Armstrong RD 11T S model features a robust brass body construction, ensuring long term durability and resistance to corrosion. Engineered with a 1 2" NPT Union Inlet and a 1 2" Female NPT outlet, it simplifies installation in tight piping configurations. The valve is pre