Looking around at the local home improvement center for a water pressure gauge, and all they seem to have is a gauge with 3/4" FGHT (Female Garden Hose Thread). Of course I could get a bunch of adapters (3/4" MGHT x 3/4" MPT -> 3/4" FPT x 1/2" FPT -> 1/2" MPT x 1/4" FPT), but I'd rather not.
The only other gauge I can find, is a 1/4" MPT gauge in the air compressor section of the store. Specifically a Husky 2 in. Heavy-Duty Side-Mount Gauge.
This gauge is exactly what I'm looking for, except that it's designed to work with compressed air.
Would there be a problem using this gauge designed for compressed air, to measure water pressure?