EDI PermaCap diffusers are designed for aeration applications in which intermittent coarse-bubble operation is desired. PermaCap units are available with either 3/8-in. or 3/4-in. NPT threaded (male) inlets to allow simple installation into threaded pipe applications. An optional universal diffuser mount is available for non-threaded applications. Units are suited for single drop pipe installations in package treatment plants and channel aeration.