Ensure you check for thermopile voltage drops before condemning the valve

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

5 VA) to minimize energy consumption and heat generation

allowing for body installation or maintenance without disturbingsystem piping

and both are technically identical OEM replacement parts for your furnace

Grundfos 99880042 Flange Gasket 30067439-890 Ensure you check for thermopileFor 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,