The things you want to look when selecting a replacement air pressure, or air regulator pressure gauge are:
- same size gauge face
- same (or close) pressure range displayed on the gauge face
- same size mounting thread or style
- same mounting position (back or bottom)
For a DIY type home air compressor, another indication that you have selected the right gauge will be the price. Expect to pay under $15 for an air pressure gauge for use in a general purpose, low end air compressor.
Replacement compressor air gauges are available at most decent hardware stores, and certainly should be available in the parts section of the store from which you purchased your air compressor originally.
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