Refer to the commercial kitchen gas piping drawing at the end of this practice test. Given: gas pressure .5 psig; spec. gravity .6; pressure drop .5` W.C.; What is the minimum size allowable for the 20` section of pipe that connects to the gas meter?

Refer to the commercial kitchen gas piping drawing at the end of this practice test. Given: gas pressure .5 psig; spec. gravity .6; pressure drop .5` W.C.; What is the minimum size allowable for the 20` section of pipe that connects to the gas meter?