From Diffuser Express
Convert the EIMCO fine bubble disc diffuser to the industry standard 9-inch diameter disc membrane diffuser units. Kits consist of the EDI FlexAir 9-inch diameter advanced technology disc diffuser unit with 3/4-inch NPT adapter to convert exisiting 1-inch connection and EPDM gasket. Normal operating airflow is between 0.5-5.0 scfm per diffuser. High-capacity diffusers are available to meet high-airflow applications.