Refer to the commercial kitchen piping installation. Assume a gas pressure of .5″ psig, a specific gravity of .6, and a gas pressure drop of .5″ water column. What is the minimum size allowable for the branch outlet at “A “?

Refer to the commercial kitchen piping installation. Assume a gas pressure of .5″ psig, a specific gravity of .6, and a gas pressure drop of .5″ water column. What is the minimum size allowable for the branch outlet at “A “?