Week 7 Flashcards
(17 cards)
A piping arrangement in which a drain from a fixture, appliance or
device discharges indirectly into another fixture, receptacle or interceptor at a point below the flood level rim and above the trap seal.
Air Break (Drainage System)
The unobstructed vertical distance through the free atmosphere between
the outlet of the waste pipe and the flood leve/ rim of the receptacle into which the waste pipe is
discharging.
Air Gap (Drainage System)
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
Air Gap (Water Distribution System)
A term applied to valves or mechanical devices that eliminate siphonage
Antisiphon
Pressure created by any means in the water distribution system, which by being in excess of the pressure in the water supply mains causes a potential backflow condition
Backflow
A pressure less than or equal to 4.33 psi (29.88 kPa) or the pressure
exerted by a 10-foot (3048 mm) column of water
Backpressure, Low Head
The backflow of potentially contaminated water into the potable water system as a result of the pressure in the potable water system falling below atmospheric pressure of the plumbing fixtures, pools, tanks or vats connected to the potable water distribution piping.
Backsiphonage
The flow of water or other liquids, mixtures or substances into the distribution pipes of a potable water supply from any source except the intended source
Water Supply System
A reversal of flow in the drainage system.
Backflow, Drainage
Any arrangement whereby backflow is possible
Backflow, Connection
A backflow prevention assembly, backflow prevention device, or other
means or method to prevent backflow into the potable water supply. A backflow preventer is classified as
either a & “CONTAINMENT BACKFLOW PREVENTION DEVICE” or an & “ISOLATION BACKFLOW
PREVENTION DEVICE”
Backflow Preventer
A device or valve installed in the building drain or sewer pipe where a sewer is subject to backflow, and that prevents drainage or waste from backing up into a lower level or fixtures and causing a flooding condition
Backwater Valve
A type of backflow preventer installed on openings subject to normal atmospheric pressure that prevents backflow by admitting atmospheric pressure through ports to the discharge side of the device.
Vacuum Breaker
An assembly consisting of one check valve force-loaded closed and
an air-inlet vent valve force-loaded open to atmosphere, positioned downstream of the check valve, and
located between and including two tightly closing shutoff valves and a test cock
Spill proof Vacuum Breaker
A device for the prevention of the backfiow of liquids, solids, or gases that is installed by the supplier of, or as a requirement of, any public water system as defined in division (A) of section 6109.01 of the Revised Code,
Containment Backflow Prevention Device
A device for the prevention of the backflow of liquids solids, or gases that is regulated by the plumbing code adopted pursuant to section 3781.10 of the Revised Code and rules adopted pursuant to this section.
Isolation Backflow Prevention Device
A backflow prevention
device consisting of two independently acting check valves, internally force-loaded to a normally closed
position and separated by an intermediate chamber (or zone) in which there is an automatic relief means of venting to the atmosphere, internally loaded to a normally open position between two tightly closing
shutoff valves and with a means for testing for tightness of the checks and opening of the relief means.
Reduced Pressure Principle Backflow Prevention Assembly
