2 Va. Admin. Code § 5-585-2330
A device such as a water treatment device or backflow preventer shall be scheduled for inspection and service, in accordance with manufacturer's instructions and as necessary to prevent device failure based on local water conditions, and records demonstrating inspection and service shall be maintained by the person in charge.Pf
§ 3.2-5121 of the Code of Virginia.
Derived from Virginia Register Volume 24, Issue 2, eff. October 16, 2007; amended, Virginia Register Volume 32, Issue 22, eff. July 12, 2016.