12 Va. Admin. Code § 5-421-2260
A plumbing system shall be installed to preclude backflow of a solid, liquid, or gas contaminant into the water supply system at each point of use at the food establishment, including on a hose bibb (threaded faucet) if a hose is attached or on a hose bibb if a hose is not attached and backflow prevention is required by law by:
§§ 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 32, Issue 22, eff. July 12, 2016.