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The MasterGuard 600 Series features a range of high flow rate valves that mix hot water with cold water to deliver water at a safe, controlled temperature, typically 120°F (49°C). It features state of art, fast-acting, high-quality thermostatic mixing valve elements that sense the outlet temperature and react to maintain a stable delivery temperature even under varying and extremely low flows. The adjusting handle can be locked at the desired temperature.

The MasterGuard is shipped complete as a kit with service fittings (integral shut-off valve and gauge port) on each inlet. The check valve and strainer assembly are housed in the body of the valve for easy serviceability. The valves comes with a temperature gauge that can be mounted either on the mixed outlet or the two inlets. The service fittings have a female inlet thread that secure to the base through union connections. The mix water outlet is female NPT. The MasterGuard series is available in sizes from ¾” to 2”.

  • Accurate temperature control, even at very low flows
  • Faster to commission, greater user comfort and safety
  • Fast reaction to changes in flow rate or supply temperature
  • Constant outlet temperature for greater comfort
  • Robust, low complexity construction
  • Superior reliability, improved user safety
  • Listed by IAPMO, CSA, and ASSE
  • Inspector friendly for peace of mind
  • Temperature Adjustment Knob can be locked at a desired temperature
  • Quality Assurance: Every valve is tested for performance

  • Outlet Temperature Range: 85 – 150°F (29.4 – 66°C)
  • Factory Set Temp. Range: 116.5°F ± 3.5°F (47°C ± 2°C)
  • Hot Temp. Supply Range: 120 – 180°F (48.9 – 82.2°C)
  • Cold Temp. Supply Range: 39 – 80°F (3.9 – 26.7°C)
  • Maximum Pressure: 125 psi (862 kPa)
  • Min. Temp Differential: 25°F (47°C)
  • Body: Lead-Free Brass
  • Seals: EPDM
  • Springs: Stainless Steel
  • Internal: Cap Brass
  • Piston PTFE: Coated Stainless Steel
  • Inlet (NPT) x Outlet (NPT): 1" X 1-1/4"
Hide Description
Outlet Size:


Inlet Size:



1" x 1-1/4"


Brass (Body)

Connection Method:


Connection Type:


Flow Rate (GPM):

64 @ 45 psi

Max Pressure (PSI):


Lead Free:



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