Designed for durability and balance

a replacement assembly is necessary

This unit requires a minimum 5 psi pressure differential to actuate and supports maximum operating pressures up to 200 psi for air and 150 psi for water

the EF17BG247 provides the necessary reliability to restore system efficiency

The HVAC high pressure cutout is calibrated to trigger at 375 PSI

Lennox 99K40 TXV 321042-401 Designed for durability and balanceThe Lennox 99K40 is a high performance HVAC thermal expansion valve engineered for precision refrigerant metering in large capacity 8 ton air conditioning systems and heat pump equipment. Featuring a 3 8" x 7 8" ODF (Outside Diameter Fitting) connection and a 30 inch capillary tube, this OEM component is designed to replace aging or failing valves in Lennox split systems, ensuring the evaporator receives the exact refrigerant charge needed to maintain