Caleffi NA553366 Boiler Trim Kit 1" Press Tank

The Caleffi NA553366 Boiler Trim Kit Press Tank is a packaged boiler installation set used in hydronic heating systems to simplify piping and control setup around a boiler circuit. It includes coordinated components such as a press connection assembly, expansion tank, air separation element, automatic fill section and associated valves and fittings arranged for system integration in HVAC systems. It is used on the water-side loop to manage pressure balance, air removal, and make-up water supply across the heating circuit. Positioned near the boiler supply and return piping, it connect key hydronic elements within the mechanical room layout, ensuring steady circulation through radiators or coil-based heating sections.