Caleffi NA553376 Boiler Trim Kit 1-1/4" Press

The Caleffi NA553376 Boiler Trim Kit is a pressure-measuring part used in hydronic heating boilers and hot water equipment, where it supports safety regulation and system monitoring. It operates through integrated fittings and control units that manage water flow in HVAC systems, pressure stabilization and temperature safety within the heating circuit. Mounted using 1-1/4-inch press connections, it is placed directly onto boiler piping as part of the primary trim and safety assembly, ensuring secure integration with supply and return lines. It improves operational accuracy, supports safe pressure management and enhances overall system efficiency during continuous heating demand.