Diffuser Diffuser Type Diffuser Disc Air Flow Rate (Maximum) 20 scfm Air Flow Rate (Minimum) 2 scfm Active Surface Area 121 sq in Compatible Intake Pipe Size 3/4 in Minimum Depth Required 6 in Bubble Type Fine Bubble Size 1 to 3 mm Number of Air Tubing Rolls 0 Number of Compressors 1 Discharge Type Disc Active Membrane Diameter 14.2 in Active Membrane Material EPDM Air Tubing Diameter 3/4 in Compatible with Media Type Wastewater Oxygen Filtered Water