Carrier EF17BZ271 Reversing Valve THPU32HP7Y the SM120-4VI is functionally identical

the SM120-4VI is functionally identical to part numbers P040-12571

For field durability

if the device fails the backpressure test on the second check

While the Rheem 51-102497-01 motor is a factory-programmed X13 replacement

Carrier EF17BZ271 Reversing Valve THPU32HP7Y the SM120-4VI is functionally identicalThe Carrier EF17BZ271 Reversing Valve is a critical 4 way pilot operated refrigerant control designed for high performance heat pump systems. Engineered as a direct replacement for 1175622, this OEM component features a 1 2" x 7 8" ODF (Outer Diameter Flare) connection, facilitating precise directional control of refrigerant flow to switch between heating and cooling cycles. Operating on a standard 24V solenoid coil, this valve is a Factory Authorized