12 Va. Admin. Code § 5-421-2200
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 shall not be less than one inch (25 mm).P
§§ 35.1-11 and 35.1-14 of the Code of Virginia.
Derived from Virginia Register Volume 18, Issue 10, eff. March 1, 2002; amended, Virginia Register Volume 24, Issue 2, eff. October 16, 2007; Volume 32, Issue 22, eff. July 12, 2016.