The Gast 0823-312Q-G302X 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. Gast Rotary Vane septic air pump is a durable, long lasting pressure air pump. This unit can be wired at 230V or 115V, but comes pre-wired for high voltage.