521509A | 3w Thermo Mixing Vlv 3/4"SWT | Caleffi Part Number_168186 Shop Our trusted HVAC store

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521509A | 3w Thermo Mixing Vlv 3/4"SWT | Caleffi Part Number_168186 Shop Our trusted HVAC store3 Way Thermo Mixing Valve (521509A) by Caleffi Caleffi's 521509A is a 3 way thermo mixing valve designed to control the temperature of mixed water in hydronic heating and cooling systems. It features a compact and durable brass body with a 3 4" SWT connection, ensuring longevity and reliability. With its precise temperature control, this valve maintains a consistent mixed water temperature, preventing scalding or discomfort. It operates on a wide