Drain Valves

The Expello Electronic Drain Valve provides increased durability and reliability for constant protection from build-up of harmful contaminants in air tanks on trucks, trailers, buses, RV’s and other vehicles.

This drain valve expels contaminants every five minutes of operation with a powerful one-second blast of air. The electronic controls and 50 watt heater provide year round protection. The corrosion resistant construction ensures maintenance-free operation over the long haul. Once installed in place of the manual drain petcock on the tank, the valve’s straight through contaminant flow and self-cleaning design provide air tank draining without daily checks.

  • Automatically cleans air systems
  • Purges moisture and contaminates from air tanks
  • 1 second blast every 5 minutes
  • Compact design fits air tanks on all trucks and buses
  • Replaces manual drain petcocks (never pull another chain to drain the tank)
  • Prevents freeze-ups with 50-Watt heater
  • Prevents brake drum damage
  • Prevents cylinder corrosion
  • Prevents sticking valves and loss of lubrication
  • Reduces noise and vibration due to contaminated air systems
  • Full One-Year Warranty

Keep in mind that no system eliminates all the moisture from the wet tank all the time.


Expello Data Sheets


Expello Drain Valve Flyer

Expello Electronic Drain Valve


Expello Pneumatic Drain Valve

Expello Shop Drain Valve


Expello Shop Drain Valve Spec