and Intertherm brands for consistent performance in high-static environments

ensure the valve is installed in a horizontal pipe run with the diaphragm chamber facing down to facilitate proper drainage and prevent water hammer

the compact grey enclosure is specifically designed for surface mounting inside ducts and economizer rooftop systems

and features dual 3/4" NPT connections for high-volume fuel delivery

If you are servicing a Nordyne or Nortek furnace and dealing with vibration or lack of airflow

York S1-151258 Expansion Valve 320788-703 and Intertherm brands for consistentThe York S1 151258 Expansion Valve is a precision engineered thermostatic expansion valve (TXV) designed for high performance refrigerant metering in York, Johnson Controls, and Luxe systems. Featuring a 30 inch capillary tube and 1 2" x 1 2" ODF sweat connections, this OEM replacement valve ensures accurate superheat control across varying load conditions. Specifically designed to prevent liquid slugging and evaporator freeze ups, the S1 151258