521616A | Mixing Valve MixCal 521 Adjustable 3-Way Thermostatic with Gauge 1 Inch Low Lead Brass Press Union 200 Pounds per Square Inch | Hydronic Caleffi Connection Details_1/4IN It is constructed with corrosion-resistant

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521616A | Mixing Valve MixCal 521 Adjustable 3-Way Thermostatic with Gauge 1 Inch Low Lead Brass Press Union 200 Pounds per Square Inch | Hydronic Caleffi Connection Details_1/4IN It is constructed with corrosion-resistantMixing Valve MixCal 521: Hydronic Caleffi Mixing Valve MixCal 521 is an adjustable 3 way thermostatic valve with a gauge. It features a 1 inch low lead brass press union and a pressure rating of 200 PSI. This valve is designed for use in plumbing and hydronics applications, such as controlling the temperature of mixed water in radiant floor heating systems. The Mixing Valve MixCal 521 is made of high quality materials and construction, ensuring