Simplified Field Upgrade: Serves as the official replacement for 300SMA11

and both are technically identical OEM replacement parts for your furnace

Trust this genuine OEM Lennox part to restore factory-spec cooling performance to your commercial or residential cooling systems without the balance issues common in universal aftermarket alternatives

reducing unnecessary service calls for manual reset limit switches

and the blower assembly to prevent cycling errors

Grundfos 99880042 Flange Gasket 30067439-890 Simplified Field Upgrade: Serves asFor service technicians maintaining hydronic systems, the Grundfos 99880042 flange gasket is the critical seal required for high performance UP and LAUP series circulator pumps. This 2 pack gasket set serves as the direct replacement for Grundfos 96409353, ensuring your 2 stage pump installations maintain a leak free interface at the inlet and outlet ports. Designed for GF 50 series flanges and compatible with 2 inch flange sets 96409354 and 96409355,