Caleffi ThermoBloc Boiler Protection, Recirculation & Distribution Unit, 1-1/4" Sweat Connections, 140 F Standard

The Caleffi ThermoBloc Boiler Protection is used in hydronic heating systems with non-condensing boilers, including solid fuel, biomass, gas LP or oil-fired. It combines the functionality of a boiler protection valve with a circulation pump and a uni...