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Caleffi 521201A SinkMixer™ 4-Way Anti-Scald Point-of-Use Thermostatic Mixing Valve, 3/8" Compression Union

Save 34%
Original price $110.00
Current price $72.47
SKU 521201A
Currently 5 in stock.

Caleffi 521201A SinkMixer™ 4-Way Anti-Scald Point-of-Use Thermostatic Mixing Valve, 3/8" Compression Union

The Caleffi SinkMixerTM 5212 scald protection undersink thermostatic mixing valve is precision engineered to deliver safe tempered water. Patent pending forged low-lead brass valve body enables high flow capacity in a very compact body. The easy-to-install 4-port design connects all water lines and, compared to standard 3-port valves, requires less piping and no tee. ICC-ES certified compliance to NSF/ANSI/CAN 61-2019 and IPC, IRC, UPC and NPC for drinking water systems in accordance with the U.S. and Canadian plumbing codes.

Temp adjustment range:  95º - 120ºF


  • Convenient 4-port design for undersink mounting:  Cold water bypass to fixture eliminates need for additional piping and tee used with 3-port mixing valves.
  • Easy installation and service:  Stand-off wall bracket for sturdy mounting and simple hose connection. Cold water outlet plug and compression fittings included in code 521210AP for single-pipe fixtures or hard piping.
  • Precision engineering:  
    • DZR low-lead brass forging resists corrosion. Patent pending design.
    • Low friction, high-performance moving parts resist scaling for stable, accurate temperature control.
    • Peroxide-cured EPDM elastomers for chlorine and chloramine resistance and long life.
  • Replaceable inlet check valves with stainless steel mesh filters:  Maximum debris protection and convenient cleaning or replacement.
  • Tamper-resistant locking nut and cap:  Prevent unauthorized set point adjustments.



  • Max Working Pressure:  150 psi (10 bar)
  • Setting Temperature Range:  95 - 120°F (35 - 49°C)
  • Factory Setting:  113°F (45°C)
  • Optimum Max. Flow:  2.3 gpm (8.5 lpm)
  • Optimum Min. Flow:  0.35 gpm (1.3 lpm)
  • Max. Working Temperature:  195°F (90°C)

Compliance with the following standards:
    ASSE 1070/ASME A112.1070/CSA B125.70 - Performance Requirements for Water  Temperature Limiting Devices
    CSA B125.3 - Plumbing Fittings
    NSF/ANSI/CAN 61, Drinking Water System Component – Health Effects
    NSF/ANSI 372, Drinking Water System Components - Lead Content
    Reduction of Lead in Drinking Water Act, California Health and Safety Code 116875
    S.3874, Reduction of Lead in Drinking Water Act
    Vermont Act 193 - The Lead in Plumbing Supplies Law
    Maryland's Lead Free Law Hb.372   


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