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- The Caleffi MixCal™ 521 series three-way thermostatic mixing valve is used in systems producing domestic hot water or in hydronic and radiant heating systems. It maintains the desired output temperature of the mixed water supplied at a constant set value compensating for both temperature and pressure fluctuations of the incoming hot and cold water. The valve has been specifically certified to ASSE 1017 and Low Lead Plumbing Law by IAPMO R&T.
- Large mixing chamber and thermostatic cartridge - Enables precise mixed temperature stability during inlet temperature and pressure variations
- Anti-scale polymer materials - Inhibits scaling on internal sliding surfaces, assuring stable temperature control and long life
- Tamper-proof adjustment setting lock - Prevents tampering of the mixed water temperature setpoint
- Peroxide-cured seals - Stands up to treated water, chlorine or chloramines
- Precisely manufactured - Finely machined threads and double o-rings for smooth knob adjustment
- Internal anti-scale materials
- Locking set point knob
- Body MaterialBRASSEnd StylePRESSFlow Capacity1 gpmNominal Size1 inPressure Rating200 psiDimensions6 in HFitting Connector TypeUnionManufacturerCaleffiManufacturer #521400AMediaGlycol / WaterSeries521Softgoods MaterialEPDM SealTemperature Rating85 to 150 deg FTop to Inlet Center2-9/16 inTrim MaterialStainless SteelType3-Way Adjustable