A three stream aspirator includes an upstream passage for receiving and discharging a motivator stream, a low pressure passage for receiving and discharging a low pressure stream, and a Venturi for receiving and discharging the motivator stream and for drawing the low pressure stream through the low pressure passage. The aspirator body also includes a mixing passage for receiving and mixing the motivator stream and the low pressure stream, and a first aspirator outlet, located at the end of the mixing passage, configured to discharge the mixed stream from the aspirator. The aspirator body further includes an isolated passage for receiving a high pressure stream, wherein the high pressure stream is isolated from any other stream while within the aspirator; and a second aspirator outlet, adjacent to the first aspirator outlet, from which the high pressure stream is discharged.