Caleffi 521419AC Thermostatic and Pressure Balanced Mixing Valve

The Caleffi 521419AC Thermostatic and Pressure Balanced Mixing Valve delivers precise temperature control for domestic hot water, hydronic, and radiant heating systems. This thermostatic and pressure balanced mixing valve combines safety, efficiency, and durable brass construction to perform under up to 200 PSI and a 2:1 inlet pressure ratio.

With a nominal size of 1/2 inch and soldered end connections, it fits compact installations while maintaining reliable performance. The set temperature range spans 85 to 150 Deg F, and the unit carries a 200 Deg F temperature rating for versatile applications. The assembly supports a flow rate of 1 GPM and a flow capacity of 3 CV, suitable for typical domestic hot water, radiant heating, and hydronic circuits. Maximum differential pressure is 20 PSI, and the maximum inlet pressure ratio is 2:1 (H/C or C/H).

• Nominal Size: 1/2 inch
• End Connections: Soldered x Soldered x Soldered
• Set Temperature Range: 85–150 Deg F
• Flow: 1 GPM (Flow Capacity 3 CV)
• Pressure Rating: 200 PSI; Maximum Differential Pressure 20 PSI
• Inclusions: Check valve, stainless steel spring, EPDM seal, PPO shutter
• Standards & Compliance: ASSE 1017, CSA B125.3, NSF/ANSI 372, IPC, IRC, UPC, NPC; Lead-Free