Dehydra Demand Drain


External Pneumatic Condensate / Moisture Drain for air compressors

A fully automatic turn-key design, zero loss drain that protects compressed air systems and requires no electricity. Translucent reservoirfor visual assurance of operation.


  • Turn-key design
  • Fully pneumatic
  • Vertical compact design
  • Non clogging
  • Translucent reservoir
  • Isolated trigger assembly
  • Full port ball valve
  • Versatile for many applications


  • Easy to install 
  • No electricity required
  • Can be installed in a tight space 
  • No strainers to clean
  • Easy-to-see condensate level “Quick check”
  • Ensures a positive action, preventing air loss
  • Provides rapid discharge and avoids pluggage by contaminants
  • Can be used for aftercoolers, receivers, dryers, or filters 

How it Removes Condensate From Compressed Air Systems

Condensate enters the drain through one of two inlet connections. A non-metallic float is tethered to a float arm. As condensate is collected and the translucent reservoir fills, the float rises. When the condensate reaches a design level, the float lifts the trigger assembly and a drain cycle is initiated. The trigger assembly opens and directs control air to the valve actuator, which in turn opens the full-port drain valve. 

Condensate will then exit the unit. As the condensate level drops, the trigger assembly closes and the valve actuator closes the drain valve. The drain is returned to a standby condition.


Inlet(2) 1/2″ NPT
Outlet1/2″ NPT
PowerClean, Dry Compressed Air
50 to 120 PSI
Pressure0 to 250 PSI • up to 450
Operating Temperature33° to 150° F.
Weight19 lbs.
Discharge52 ounces per cycle


Reservoir Composite
ValveBronze w/S.S. Ball and Stem
FloatPoly (Stainless Available)
*Consult factory for additional options


Ordering Information

Stock No.Description
Dehydra Dehydra Drain

Support and Downloads

Dehydra Installation Operating Manual

Dehydra Dimensional Drawing

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