The White-Rodgers 21D64-2 is a robust 120V silicon nitride ignitor upgrade kit engineered for high-durability performance in residential gas furnaces

The Lennox 18J74 Pressure Switch is a high-precision low ambient pressure switch engineered to regulate head pressure by cycling the outdoor fan motor during cooling cycles

5 to 15 HP range

Key Benefits for Technicians: Durable Construction: The zinc metal bowl ensures structural integrity in high-vibration or high-temperature pneumatic circuits

You must verify the specific WC rating and part number against your unit’s data plate or parts manual to ensure proper safety operation

Watts 0556034 Valve 30067439-890 The White-Rodgers 21D64-2 is aThe Watts 0556034 (Model LF3L 150) is a high performance 3 4 inch poppet type pressure relief valve designed specifically for domestic storage tanks and tankless water heaters. As the direct lead free replacement for the legacy Watts 0011917, this valve features a lead free copper alloy body and a rugged stainless steel spring to ensure reliable operation in demanding residential and commercial plumbing systems. Factory set at 150 psi, this ASME rated