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The Caleffi Z55 Zone Valve helps run hydronic heating and cooling systems by managing water flow correctly. This valve opens and closes at 7.5 Cv and works with a 24V power source, using sweat connections for simple installation. When the thermostat says it's time to heat, the valve opens to let hot water flow through, and sends warmth exactly where it's needed. 

The Caleffi 573009A is a 1/2-inch sweat automatic filling valve with a 1/2-inch NPT connection, designed for incorporation into hydronic heating systems such as boilers and radiant heating setups. By preventing overfilling and automatically replacing water as needed, this valve plays a crucial role in ensuring that the system's water level stays at the proper level.

Manufacturer Name: Caleffi Product Number: 521519A OEM Part Number: 521519A Product Description: 3Wtherm Mixing Valve 3/4"Swt Weight:2.68lbs/1215.63g

The Caleffi 521519A 3-Way Thermostatic Mixing Valve is used to mix cold and hot water to provide a stable and safe outlet temperature for different applications with emphasis on HVAC systems. This 3/4” sweat valve works on the principle.

The Caleffi 521516A is a 3/4-inch three-way mixing valve equipped with a pressure probe, tailored for integration into hydronic heating systems like boilers and radiant heating setups. By combining hot and cold water streams to get the optimal setpoint, this valve is essential in controlling the temperature of water running throughout the system.

The Caleffi 521519AC 3-Way Thermostatic Mixing Valve is an essential part that mixes cold and hot water to get the required temperature at the outlet for different usages in HVAC systems. This valve has a 3/4” sweat connection and is designed to use a thermostatic element that controls the flow of cold and hot water so that a user cannot be scalded or receive a thermal shock.

Manufacturer Name: Caleffi Product Number: Z151000 OEM Part Number: Z151000