Page 24 - Vessel Sanitation Program 2018 Construction Guidelines

VSP 2018 Construction Guidelines

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).

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.

Automatic pump shut-off (APS): System device that can sense a BLOCKABLE
DRAIN blockage and shut off the pumps in a RECREATIONAL WATER
FACILITY.

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