The ET double series range of air pumps ensures that there is plenty of water movement in wastewater applications; this boosts oxygen levels in the water, allowing aerobic bacteria to decompose. The double series offer high flow from a small footprint, and offer a useful alternative to expensive and ineffective rotary vane and side-channel blowers.



250 l/min (0.20 bar)

26mm Connector Size


300 l/min (0.20 bar)

26mm Connector Size


400 l/min (0.20 bar)

27mm Connector Size


  • Low cost, exceptionally reliable with long service intervals.

  • Ideal for large scale sewage treatment systems or pond aeration.

  • Fit for both indoor and outdoor use due to its weatherproof design.

  • Compatible with our service kits to help extend the life of the pump.

500 l/min (0.20 bar)

27mm Connector Size


ET250-500 Service packs available

Watch video procedure