This chapter also applies to the installation of plumbing equipment in any conversion vendor unit or medical unit bearing or required to bear a department insignia. Plumbing fixtures, equipment, and installations in conversion vendor units and medical units must conform to the provisions of Chapter 7 of ANSI 119.2, 2002 edition or the Uniform Plumbing Code and the amendments adopted by the State Building Code Council, except part 1, unless specifically exempted or required by this section. The following also apply:

(1) We will allow a 1-1/4 inch drain for handwashing sinks with an antisiphon vent.

(2) An antisiphon vent will be allowed on one and two compartment sinks in units as long as there is one vent to the exterior so the system will function. Sinks with three or more compartments must be installed as required by the Uniform Plumbing Code.