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Therm-O-Mix® Station WWM


After water flow is activated at the shower or eyewash, the outlet water temperature will reach 85°F (29°C) when hot water arrives at the mixing valve. The mixing valve then blends the hot and cold water to produce an output of 85°F (29°C) water from 3 GPM (11.4 L/min) to 25 GPM (113.7 L/min) with a water inlet pressure of at least 40 PSIG (2.8 BAR).

At 50 GPM (189.3 L/min) pressure drop is 25 PSIG (1.7 BAR) therefore with a water inlet pressure of at least 60 PSIG (4.1 BAR) this unit is capable of enough flow for two combinations shower/eyewash stations running simultaneously.

Typical Applications

OSHA and ANSI require all your emergency fixtures to provide tepid water for a minimum & continuous 15-minute cycle. Tepid is defined to be between 60°F (16°C) and 100°F (38°C). The Therm-O-Mix® WWM Tepid Delivery System can ensure your emergency equipment will meet these codes. Since the station does not require any electric power, it is suitable for explosion-proof environments and outdoor installations.

The Therm-O-Mix WWM is typically used in facilities with only hot and cold water supply to provide tepid water delivery to safety shower and face/eyewash stations.

Design Features

  • Exclusive self-actuating Thermoloid® wax blend thermal actuator
  • Conforms to OSHA and ANSI recommendations
  • This unit is capable of enough flow for two combination shower/eyewash stations to run simultaneously
  • Compact, lightweight design easily supported by piping connections


  • Self-operating – no external power source required
  • All components are in-line serviceable
  • Easy to retrofit on existing shower or combination shower/eyewash stations
  • Maintains constant 85°F (29°C) output
  • Utilizes existing hot and cold water supply
  • Optional durable, all-weather version in high visibility LDPE enclosure available




387 - 201000 - 000



  1. Where unit is used as a safety shower or eyewash station, the final outlet temperature should be specified by the Facilities Medical Supervisor or other authorized personnel.
  2. Additional temperatures are available, Contact Centro, Inc. for order information: 70°F, 75°F & 80°F.


  • Inlet/Outlet Size: 1”
  • Cv = 10.0
  • Water Inlet Pressure: 40 PSIG (2.8 BAR)
  • Pressure Drop: 25 PSIG (1.7 BAR)
  • Weight: Under 15 lbs/6 kg


Therm-O-Mix® Station WWM Product Sheet
Therm-O-Mix® Station WWM Installation and Maintenance Instructions
Therm-O-Mix® Station WWM Troubleshooting Manual
Temperature Control for Emergency Safety Equipment Brochure

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