the "EF" prefix indicates an explosion-proof enclosure suitable for NEMA 7 and 9 ratings

it is inherently more resistant to oxidation than standard galvanized steel wheels

which is identical to the Honeywell 4074EYL/U model

The Schneider Electric 22-021 Mounting Kit (formerly Barber Colman) is a heavy-duty universal wall mounting kit engineered for securing pneumatic thermostats and legacy HVAC controllers in commercial environments

This unit requires a 208-230V single-phase power supply

Resideo HYDROSEP-102-U Hydraulic Separator Union 321894-709 the "EF" prefix indicates anThe Resideo HYDROSEP 102 U is a 1 inch magnetic hydraulic separator union engineered for high performance hydronic flow management. This field proven low loss header effectively de couples the primary boiler circuit from secondary distribution loops, preventing pump conflict and ensuring stable head pressure across varying load demands. Constructed with vernished FE360 steel, it features an integrated AlNiCo magnet for aggressive magnetite removal and