Lennox 15W12 Expansion Valve 322838-754 while the RK 909-CK2 (0887121)

while the RK 909-CK2 (0887121) is specifically for the second check valve

Technicians will find the 3/4" suction and 1/2" discharge sweat connections standard for quick installation

it is fully compatible with a range of Johnson Controls

Common indicators include fluctuating water temperatures

making it suitable for a wide range of furnace sizes

Lennox 15W12 Expansion Valve 322838-754 while the RK 909-CK2 (0887121)The Lennox 15W12 Indoor Expansion Valve is a critical OEM component engineered for high precision refrigerant metering in residential and light commercial R410A HVAC systems. As a thermal expansion valve (TXV), it utilizes a 1 2 inch outlet and 3 8 inch inlet connection to maintain the precise superheat required for optimal evaporator performance. This replacement expansion valve is designed to replace part number 100254 06, directly addressing issues