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Backflow Prevention > Glossary > Flashcards

Glossary Flashcards

1
Q

The total pressure; gauge pressure plus atmospheric pressure. Absolute pressure is generally measured in pounds per square inch, Pisa

A

Absolute pressure

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2
Q

The unobstructed vertical distance through the free atmosphere between the lowest opening from any Piper outlet, supplying water to a tank, plumbing fixture, or other device, and the flood level ramp of the nonpressurized receiving vessel or receptacle

A

Air gap, air gap separation

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3
Q

Accepted by the responsible authority. Meets applicable standards and specifications.

A

Approved

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4
Q

Accepted by the responsible authority. Meets applicable standards and specifications.

A

Approved

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5
Q

The pressure exerted by the weight of the atmosphere, 14.7 psi at sea level. As the elevation above sea level increases, the atmospheric pressure decreases. 1.0 PSI is equivalent to a 2.31 foot column of water at sea level.

A

Atmospheric pressure

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6
Q

A mechanical backflow preventer device consisting of a float check valve and and air inlet port; designed to prevent back siphonage by allowing air to enter the downstream waterline. This unit does not provide protection against back pressure or continuous pressure. A shut off valve is not allowed downstream from the device. A shut off valve downstream would allow the device to be subjected to continuous pressure.

A

Atmospheric, vacuum breaker, AVB

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7
Q

Any water supply on or available to the premises other than the potable water supply. May include water from another potable, water supply, or any natural sources such as a well, lake, spring, river, stream, harbor, reclaim water, or industrial fluids.

A

Auxiliary water supply

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8
Q

The reversed flow of a non-potable source into a potable system, because a pressure differential exist where the pressure on the non-potable side is greater than the pressure on the potable side. There are two different types:

A

Backflow

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9
Q

A mechanical backflow of inner, SVB, PVB, DCVA, RP); used to prevent the backflow of contaminants or pollutants into a potable water distribution system. And assembly has a resilient seated, full flow shut off out before, and after the backflow preventer making it testable in line. The assembly is shipped with the shut off valves attached to the backflow preventer. And assembly is labeled with the manufacturer symbol, size, serial number, model number, the working pressure, the direction to flow.

A

Backflow prevention assembly

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10
Q

A mechanical backflow preventer without the shut off valves. An atmospheric vacuum breaker is a device. It does not have shut off valves on the downstream side of the backflow prevention make it ism. Also, any backflow prevention assembly without the shut off valves is called a device.

A

Backflow prevention device

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11
Q

A mechanism for preventing backflow that includes mechanical, backflow prevention, assemblies, and devices as well as air gaps

A

Backflow prevention method

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12
Q

A condition in which the pressure in a non-potable system is greater than the pressure and the potable water distribution system. Superior pressure will cause non-potable liquids to flow into the potable water distribution system through cross connections.

A

BackPressure

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13
Q

Reverse flow of liquid caused by a partial vacuum in the potable water distribution system. A condition that occurs when the supply pressure drops below atmospheric pressure.

A

BackSiphonage

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14
Q

A person who has attended and satisfactory completed at least a 32 hour training course that is endorsed by the Florida section of the American waterworks association

A

Certified backflow prevention assembly tester

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15
Q

A person who has attended and satisfactory completed at least a 32 hour training course that is endorsed by the Florida section of the American waterworks association

A

Certified backflow prevention assembly tester

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16
Q

An agreement between water supplier, and the consumer that specifies the obligation and responsibilities of each in order for service to be provided

A

Condition of service

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17
Q

Person or facility receiving service from a portable water system

A

Consumer

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18
Q

To confine potential contamination caused by a cross connection within the facility where it arises by installing a backflow prevention assembly at the point of service. Sometimes called premise isolation or service protection.

A

Containment

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19
Q

The introduction of any substance into water at levels that degrade the quality of water, making it unfit for human consumption because it would adversely affect public health

A

Contamination

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20
Q

A condition in which upstream pressure is applied continuously, more than 12 hours, to a device or assembly. This can cause mechanical parts within a backflow preventer to become stuck or frozen, thus causing the backflow preventer to malfunction.

A

Continuous pressure

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21
Q

A reference line representing the level of the check valve seat within a spill resistant, vacuum breaker or atmospheric vacuum breaker. This line is used in measuring the elevation of the vacuum breaker above the highest point of water use, either the highest outlet or flood level rim.

A

Critical level

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22
Q

Any arrangement of pipes, fittings, fixtures, or devices that directly or indirectly connect a non-potable system to a potable water system. Bypass arrangements, jumper, connections, removable, sections, swivel, or changeover, assemblies, or any other temporary or permanent connecting arrangement through which backflow may occur.

A

Cross-connection

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23
Q

The use of assemblies, devices, methods, and procedures to prevent contamination or pollution of potable water supply through cross connections

A

Cross connection control

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24
Q

The danger posed by a particular substance or set of circumstances. Generally, a low degree, is one that does not affect health, but may be aesthetically objectionable. Thus it is turned a non-health hazard. A level that is high is that could cause serious illness, or death thus it is termed a health hazard.

A

Degree of hazard

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25
Q

A link between the potable water supply and any other non-potable system, which is subject to both back pressure and back siphonage

A

Direct cross connection

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26
Q

All pipes, fittings, and fixtures used to convey liquid or gas from one point to another

A

Distribution system

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27
Q

A method of backflow prevention consisting of two independently operating check valves, four test cocks, and to shut off valves. It is only used to protect against a non-Health hazard. It can be subjected to back pressure.

A

Double check valve assembly

28
Q

A method of backflow prevention consisting of two independently operating check valves, without any test cocks or shut off valves. It is considered appropriate for use against a non-health hazard. It can be subjected to pressure residential dual check.

A

Dual check valve

29
Q

The minimum cross-sectional area at the point of water supply discharge. The openings dimensions are expressed in terms of the diameter of a circle or the opening if it is not circular the equivalent cross-section area. Used in determine the minimal vertical distance that should be provided to create an air gap.

A

Effective opening

30
Q

The level from which liquid and plumbing fixtures, appliances, tanks, or vats, well overflow to the floor, when all drain and overflow openings built into the equipment are obstructed

A

Flood level rim

31
Q

Pounds per square inch, PSI, that are registered on a gauge. This pressure measures only the amount of pressure above, or below, atmospheric pressure.

A

Gauge pressure

32
Q

A cross connection or potential cross connection involving a contaminant insufficient concentration to spread disease or cause death. Also called a high hazard.

A

Health hazard

33
Q

A temporary link between the potable water supply and any other non-potable system, which is subject to back siphonage only

A

Indirect cross connection

34
Q

To confine a potential source of contamination to the non-potable system being served; to provide a backflow prevention mechanism at each actual or potential cross connection. Sometimes called internal protection.

A

Isolation

35
Q

Legally responsible for being obligated by law for the protection of the potable water

A

Liability

36
Q

The maximum permissible level of a contaminant in water delivered to the free flowing outlet of the ultimate user of a public water system. Contaminants added to the water under circumstances, controlled by the user, except those resulting from corrosion of piping and plumbing caused by water quality, are excluded.

A

Maximum contaminant level

37
Q

Pressure that is less than atmospheric pressure. And a pipe can induce a partial vacuum that can siphon non-potable liquids into potable water distribution system.

A

Negative pressure

38
Q

Not meeting ones responsibility and causing harm

A

Negligence

39
Q

A cross connection or potential cross connection involving any pollutant or contaminant, at low levels, that will not create a health hazard, but will create a nuisance, or be aesthetically objectionable, if introduced into the potable water supply. Also classified as a low hazard.

A

Non-health hazard

40
Q

Any liquid, gas, or solid that can be diluted, dissolve, suspended, or mixed with water that adversely affects the quality of the water

A

Non-potable water or system

41
Q

Another term for open receptacle, such as a sink or bathtub

A

Non-pressurized receiving vessel

42
Q

Not poisonous; a substance that will not cause illness or discomfort if consumed

A

Non-toxic

43
Q

A disease causing agent or organism

A

Pathogen

44
Q

A link between the potable water supply and any other non-potable system that is designed to remain in place

A

Permanent cross connection

45
Q

Removal of pipes, fittings, or fixtures that connect a potable water supply to non-potable system or one of questionable quality.

A

Physical disconnection

46
Q

Any arrangement of pipes, fittings, fixtures, and devices for the purpose of moving liquids or gases from one point to another, generally within a single structure

A

Plumbing

47
Q

A substance that can injured, impair, or cause death to a living organism

A

Poison

48
Q

A substance that deteriorates the aesthetic quality of water or other materials, but is not harmful to health. Are considered non-Health or low hazards.

A

Pollutant

49
Q

Water that is safe for human consumption, meets the safe, drinking water standards, and is aesthetically pleasing

A

Potable water

50
Q

The force exerted on a surface, expressed in units of pounds per square inch, psi, feet of head, etc.

A

Pressure

51
Q

An assembly consisting of one independently operating spring loaded, check valve, and independently operating, loaded air, inlet valve, two test cocks, and to shut off valves. This assembly is designed to prevent back siphonage. It cannot be used where it may be subject to back pressure. It can be operated under continuous pressure.

A

Pressure vacuum breaker

52
Q

A cross connection between a potable and non-potable system where adequate methods are provided to prevent backflow

A

Protected cross connection

53
Q

A mechanical assembly consisting of four test cocks, two shut off valves, two independently operating, spring loaded, check valves with a reduce press zone between the checks. The zone contains a relief that will med to atmosphere if the pressure in the zone falls within two psi of the supply pressure. The assembly protects against both back pressure and back siphonage.

A

Reduced pressure principle assembly

54
Q

A formal policy adopted by a utilities governing board to enable the utility to refuse or discontinue service, unknown, or potential hazard exist, and corrective measures are not undertaken to eliminate the hazard.

A

Refusal of service

55
Q

Any local, state, or federal authority, given the power to issue rules or regulations having the force of law for the purposes of providing uniformity and details in procedures

A

Regulating agency

56
Q

A device designed to release air from a pipeline, or introduce air into a line if the internal pressure drops below atmospheric pressure

A

Relief valve

57
Q

A piping connection between the water purveyors Maine and the users system

A

Service connection

58
Q

And as assembly designed to prevent back siphonage, that can be used under continuous pressure; the assembly includes an independently operating spring loaded, check valve and an independently loaded air inlet valve located on the discharge side of the check with shut off valves located on the inlet outlet side of the assembly, a resilient seated test cock Located upstream of the number one shut off valve and downstream of the check with a properly located vent valve above the check valve and below the air inlet valve.

A

Spell resistant, vacuum breaker

59
Q

An arrangement of pipes, fittings, or devices that introduces water into a non-potable system below the flood level rim of a receptacle.

A

Submerged inlet

60
Q

A link between the potable water supply and any other non-potable system created with removable sections, swivel or changeover devices, garden hoses, and any non-permanent methods

A

Temporary cross connection

61
Q

An appurtenance on an assembly or valve used when testing the assembly

A

Test cock

62
Q

The increase in pressure in a closed water system due to heating and expanding water

A

Thermal expansion

63
Q

Poisonous; a substance capable of causing injury or death. May be ingested, inhaled, or absorbed through the skin.

A

Toxic

64
Q

A cross connection between a potable and non-potable system where inadequate methods are provided to prevent backflow

A

Unprotected cross connection

65
Q

Pressures below atmospheric pressure. A condition induced by negative, sub, atmospheric, pressure that causes back siphonage to occur.

A

Vacuum

66
Q

As the velocity, speed, of water increases, the pressure decreases. This affect can create a vacuum, sub, atmospheric pressure condition, in a distribution system. Also known as Bernoulli’s principal.

A

Venturi effect

67
Q

An organization that is engaged in producing and or distributing potable water

A

Water supplier/purveyor

Backflow Prevention (11 decks)

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