Page 38 - Vessel Sanitation Program 2018 Operations Manual

VSP 2018 Operations Manual

Air gap (AG): The unobstructed vertical distance through the free atmosphere
between the lowest opening from any pipe or faucet supplying water to a tank,
PLUMBING FIXTURE, or other device and the flood-level rim of the receptacle
or receiving fixture. The AIR GAP must be at least twice the inside diameter of
the supply pipe or faucet and not less than 25 millimeters (1 inch) (Figure 2).

Antientanglement cover: A cover for a drain/SUCTION FITTING designed to
prevent hair from tangling in a drain cover or SUCTION FITTING in a
RECREATIONAL WATER FACILITY.

Antientrapment cover: A cover for a drain/SUCTION FITTING designed to
prevent any portion of the body or hair from becoming lodged or otherwise forced
onto a drain cover or SUCTION FITTING in a RECREATIONAL WATER
FACILITY.

Approved: Acceptable based on a determination of conformity with principles,
practices, and generally recognized standards that protect public health, federal
regulations, or equivalent international standards and regulations. Example of
these standards include those from the American National Standards Institute
(ANSI), National Sanitation Foundation International (NSF International),
American Society of Mechanical Engineers (ASME), American Society of Safety
Engineers (ASSE), and Underwriter’s Laboratory (UL).

Attack rate: (1) The proportion of individuals exposed to an infectious agent who
become clinically ill. (2) The cumulative incidence of infection in a group
observed over a period during an epidemic.

Atmospheric vacuum breaker (AVB): A BACKFLOW PREVENTION
DEVICE that consists of an air inlet valve, a check seat or float valve, and air
inlet ports. The device is not APPROVED for use under continuous water
pressure and must be installed downstream of the last valve.

3.0 Definitions; 9