One-Way Altitude Valve

The Model 3331 is applicable anywhere it is necessary to automatically maintain the water level in elevated storage tanks or reservoirs. Such applications which occur in fire protection systems, municipal water, rural water and industrial plants.


  • Automatic tank fill and shut-off without the use of floats or sensors
  • Accurate shut-off to within inches of set point
  • High level point adjustable with single screw
  • Exhaust-to-atmosphere operation allows minimum pressure loss
  • Can be maintained without removal from the line
  • Adjustable response speed
  • Factory tested and can be pre-set to your requirements
Model Sheet Model Sheet (metric) Specifications Animation Operations Manual
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