Replacement Adapter with O-ring for Pool Filter Pressure Gage

[Paul Jones]

The pool manufacturer used a simple rubber gasket and NPT to 5/8-18 adapter to attach a pressure gage to the pool filter canister. The rubber gasket is exposed to sunlight and eventually degrades and allows the pool filter system to loose pressure. I made a new adapter from C360 brass. The adapter uses a Buna N O-ring 115, thread NPT 1/4-18, and single point threaded 5/8-18, and a 0.125" thick brass washer. The adapter has 0.3" high flats milled for a 1" wrench.