Gast AT05-520-G215DX Rotary Vane Septic Air Pump

The Gast AT05-520-G215DX septic air pump is the choice of professional installers who want to give customers a long trouble free septic air pump. The compressor is not sensitive to back pressure like diaphragm pumps. It is not uncommon for a Gast unit to work for 8-10 years with no issues. Than means the unit will have made over 7 billion rotations before having to be rebuilt. It achieves this with a unique vane that puts a film down on the counter face so that the material is wearing against it self.This allows the vane to wear at a rate of a thousandth of an inch per year. It is important to clean the compressors top filter every 4 months as dust entering the the septic air pump takes the film layer away affecting longevity and time between rebuild.

Max Flow (60 Hz) 4.8 cfm (8.2 m3/h)
Max Pressure 5 psi (0.4 bar)
Max Vacuum 24 in-Hg (150 mbar)
Power Rating 1/4 hp (0.19 kW)


Gast AT05-520-G215DX rotary vane air compressor.


Ask a Question
  • What is the difference between the Gast AT05-101-G215DX and the AT05-520-G215DX? Also, Do you sell enclosures to protect a rotary vane pump from the weather?

    The only difrenceis a the motor might have been tweaked in one way or another there is no change to the design, output, or H.P. 

  • does this come in a 1/2HP?

    No the 1/4hp motor is specfice to the Gast AT05 it never came in 1/2HP. There are other models Gast makes but in the 23 series there is no 1/2HP models.

  • What's the warranty on this motor?

    One year warrany on gast pumps I have only seen a couple out of the thousand stop in a year and its not the motor but the pump end they normally last 6-9 years before a rebuild is needed.