The kamair disc diffuser is a fine pore flexible membrane diffusers that provide operational flexibility with maximum oxygen transfer efficiency. Kamair 25cm & 32cm diameter diffusers employ a 3/4 inch diameter pt (male) threaded connection for ease of installation/maintenance and universal application. Alternate materials of constructions are available for special applications. Kamair disc diffuser units are available with premium quality epdm membranes. Multiple perforation patterns are available to optimize system performance. The flexible membrane diffusers incorporate an external check valve design to prevent intrusion of liquid or solids into the diffuser or air piping under normal on/off operating conditions.