FULL FOOD CODE:
An air gap between the water supply inlet and the flood level rim of the PLUMBING FIXTURE, EQUIPMENT, or nonFOOD EQUIPMENT shall be at least twice the diameter of the water supply inlet and may not be less than 1 inch. (P)

FULL FOOD CODE:
Multiuse FOOD-CONTACT SURFACES shall be: SMOOTH, be easily cleaned, free of breaks, chips, pits, etc and easily accessible for cleaning and inspection. (Pf)

FULL FOOD CODE:
(A) Wall and ceiling covering materials shall be attached so that they are EASILY CLEANABLE. (B) Except in areas used only for dry storage, concrete, porous blocks, or bricks used for indoor wall construction shall be finished and SEALED to provide a SMOOTH, nonabsorbent, EASILY CLEANABLE surface.