Designed specifically as an upper stem wiper

Robust Construction: Encapsulated coil design resists moisture

Debris-Resistant Design: The sealed housing protects internal contacts from dust and insects

the valve typically defaults to the heating mode when de-energized (failsafe for winter)

Resideo VCZAR1100 Valve 320819-301 Designed specifically as an upperThe Resideo VCZAR1100 is an industrial grade 1 inch NPT two way cartridge cage valve engineered for precision control in hydronic systems. Designed with a 6. 6 Cv flow coefficient and a linear flow characteristic, this valve ensures stable temperature regulation in both chilled and hot water applications. The bronze body construction, paired with a stainless steel stem and EPDM O ring seals, provides the durability required for closed loop systems