Diffuser Diffuser Type Diffuser Disc Air Flow Rate (Maximum) 20 scfm Air Flow Rate (Minimum) 3 scfm Active Surface Area 32 sq in Compatible Intake Pipe Size 3/4 in Minimum Depth Required 6 in Bubble Type Coarse Bubble Size 9 to 12 mm Number of Air Tubing Rolls 0 Number of Compressors 1 Discharge Type Disc Active Membrane Diameter 5 in Active Membrane Material EPDM Air Tubing Diameter 3/4 in Compatible with Media Type Wastewater Oxygen Filtered Water