12" Rubber Membrane Air Diffuser w/ 1/2" MPT

These EPDM rubber air diffusers are incredibly strong and very easy to clean. In testing, they produce a slightly larger air bubble than air stones or other diffusers, which means less oxygen transfer into the water. But their low cost and effortless setup makes them a terrific choice if you are simply trying to circulate or destratify pond water. Diffusers have 1/2" MPT connection. Use our #SS41238 adapter to attach to 3/8" airline. The table below shows the recommended and maximum airflow for each of the rubber membrane diffusers in Cubic Feet per Minute (CFM).   Item # Recommended Airflow Maximum Airflow #RAD650W 0.4 CFM 1.7 CFM #RAD850 0.7 CFM 2.5 CFM #RAD1250 0.9 CFM 3.5 CFM