The Pentek 154116 is the correct replacement filter housing MB caps for the following housings:
The Pentek 154116 3/4" Filter Housing MB Cap is a replacement filter housing MB cap for #10 and #20 housings. This filter housing cap has a black finish and 3/4" inlet NPT/outlet connection. In addition, this Pentek black mounting boss cap includes an ergonomic pressure release button for quick filter changes. This mounting boss requires an MC-1A bracket for wall mounting that is not included with this unit.
Pentek 154116 3/4" Filter Housing MB Cap specifications: