The Pentek 154639 is compatible with the following:
The 3G 3/4" Blue Mounting Bracket Cap is a replacement mounting bracket with a blue finish that fits all 3G housings. This slim line housing cap includes an ergonomic pressure release button that makes replacing filters easier. In addition, this cap for Pentek slim line housing has a 3/4" inlet NPT/outlet connection and is manufactured with polypropylene, a very durable material that makes this cap longer lasting.
3G 3/4" Blue Mounting Bracket Cap specifications: