Hey Norm, most authorties frown upon an “air test” unless it is for gas lines.
For vent and soil and waste a hydrostatic test of 5 PSI or a 10 ft head is suggested
For water lines a hydrostsatic test pressure if off a city main then the city pressure is used to test the main coming in.
In side the house we normally give a test of 50% GREATER then the normal expected design pressure.
An air test can cause a pipe to litterly explode Tell the powers that be GET a copy of the ASME section IV code for Petes sake
