Quote:
Originally Posted by JamesCH95
Another pneumatic system question: does the steel NPT fitting, standard on the Viair compressors, need to be installed?
It is the compressor's fitting that typically comes with a plastic plug in it, seen here:

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It comes installed, so you would have to take it off. That sounds like modification to me.
Why don't you want it? It doesn't add much weight, and it gives you an easy adaptation to a tee fitting for the relief valve.