7" air diffuser with 3/8" brass fitting (threaded)
This sturdy diffuser has a heavy base that will not blow off giving you years of service. Normal flow is 1.5 cfm. less is better as the bubbles are smaller and yo get better oxygen transfer. This diffuser has a 3/8" threaded fitting and is used on the windmills or you can screw on a check valve.
Pond Perfections inc. Catalog