Grundfos 91584912 Flange Set 321702-401 This precision differential air pressure

This precision differential air pressure switch is factory-set to trigger at a 0

Whether you are performing routine maintenance or troubleshooting a "blocked outlet" fault code

provide the stability required for differential pressure sensing in complex ductwork

it is designed to manage various HVAC electrical connections

Grundfos 91584912 Flange Set 321702-401 This precision differential air pressureFor high capacity commercial hydronic systems, the Grundfos 91584912 provides a rugged, 3 inch NPT threaded connection designed for a precise fit with UPS 53 series circulator pumps. This GF53 cast iron flange set is a direct replacement solution for contractors maintaining hot water recirculation systems or large scale radiant heating loops. Constructed from heavy duty cast iron, these 3 inch pump flanges are engineered to withstand the thermal