As the direct professional replacement for the Watts 0322825 (N256)

reducing the need to carry two separate part numbers on the truck

this Alco-style control provides the durable construction and calibration accuracy required for critical system protection

This part typically includes the top cover plate

Constructed from high-durability galvanized steel

Armstrong Fluid Technology 805189-621K Flange Set 320788-702 As the direct professional replacementThe Armstrong Fluid Technology 805189 621K flange set and hardware kit is built for secure, leak free installation of hydronic pump flange kit connections on 2. 5" LFB systems. Designed to match Armstrong circulators and in line pumps, this kit includes precision machined flanges and properly sized hardware to maintain alignment and sealing under typical HVAC operating pressures. Contractors rely on this 2. 5 inch pump flange set for consistent