521500A | Mixing Valve MixCal 521 Adjustable 3-Way 3/4 Inch Male NPT Union Low Lead Brass 200 Pounds per Square Inch | Hydronic Caleffi Part Number_PA11B and manufacturing industries * Suitable

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521500A | Mixing Valve MixCal 521 Adjustable 3-Way 3/4 Inch Male NPT Union Low Lead Brass 200 Pounds per Square Inch | Hydronic Caleffi Part Number_PA11B and manufacturing industries * SuitableMixing Valve MixCal 521: 3 Way with Check Valve The Caleffi 521 Mixing Valve is a high performance 3 way mixing valve designed for precise temperature control in plumbing and hydronic systems. With its durable construction, adjustable flow rates, and check valve, this valve ensures optimal performance and reliability. Crafted from low lead brass, the valve body provides strength and corrosion resistance, while the male NPT union connections ensure