This gasket is the standard cover seal for Armstrong B2 and B3 series F&T traps

the "/U" suffix simply denotes a trade-packaged version

contractors ensure the system operates within the original manufacturer's CFM parameters

reducing labor time during field replacement and ensuring a bolt-on installation

The Bard HVAC 5651-094BX Expansion Valve is a critical thermal expansion device engineered for precise refrigerant metering in R-22 HVAC systems

Lennox 28W44 Flue 323269-701 This gasket is the standardThe Lennox 28W44 Flue Exhaust Tee is a critical OEM replacement part designed for precision venting in high efficiency gas furnaces. Engineered from rugged steel, this flue assembly ensures the safe and streamlined redirection of combustion gases, maintaining the atmospheric integrity of the heat exchanger circuit. As a veteran grade HVAC exhaust component, the 28W44 is built to withstand high temperature cycles without structural degradation or seal