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Uniform Plumbing Code (UPC) > Ch 10 - Traps > Flashcards

Ch 10 - Traps Flashcards

1
Q

Fill in the blank

Not more than _____ trap shall be permitted on a trap arm.

A

One

Each plumbing fixture, shall be separately trapped by an approved type of liquid seal trap. This section shall not apply to fixtures with integral traps. Not more than one trap shall be permitted on a trap arm.

2024 UPC - 1001.2 Where Required.

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2
Q

Fill in the blank

The vertical distance between a fixture outlet and the trap weir shall be as short as practicable, but in no case shall the tailpiece from any fixture exceed _____ inches in length.

A

24 inches

The vertical distance between a fixture outlet and the trap weir shall be as short as practicable, but in no case shall the tailpiece exceed 24 inches (610 mm) in length.

2024 UPC - 1001.2 Where Required.

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3
Q

Fill in the blank

One trap may serve a set of not more than _____ single compartment sinks or laundry tubs of the same depth.

A

3

One trap shall be permitted to serve a set of not more than three single compartment sinks or laundry sinks of the same depth or three lavatories immediately adjacent to each other and in the same room where the waste outlets are not more than 30 inches (762 mm) apart, and the trap is centrally located where three compartments are installed.

2024 UPC - 1001.2 Where Required.

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4
Q

Fill in the blank

A trap arm may change direction without the use of a cleanout when such change of direction does not exceed _____ degrees.

A

90 degrees

A trap arm shall be permitted to change direction without the use of a cleanout where such change of direction does not exceed 90 degrees (1.57 rad). Horizontal changes in the direction of trap arms shall be in accordance with Section 706.3.

2024 UPC - 1002.3 Change of Direction.

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5
Q

Fill in the blank

Each trap, except for traps within an interceptor or similar device shall be _____.

A

Self-cleaning

Each trap, except for traps within an interceptor or similar device shall be self-cleaning. Traps for bathtubs, showers, lavatories, sinks, laundry sinks, floor drains, urinals, drinking fountains, dental units, and similar fixtures shall be of standard design, weight and shall be of ABS, cast-brass, cast-iron, lead, PP, PVC, or other approved material. An exposed and readily accessible drawn-copper alloy tubing trap, not less than 17 B & S Gauge (0.045 inch) (1.143 mm), shall be permitted to be used on fixtures discharging domestic sewage.

2024 UPC - 1003.0 Traps - Described. 2024 UPC - 1003.1 General Requirements.

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6
Q

Fill in the blank

The trap shall be the same _____ as the trap arm to which it is connected.

A

Size

The size (nominal diameter) of a trap for a given fixture shall be sufficient to drain the fixture rapidly, but in no case less than nor more than one pipe size larger than given in Table 702.1. The trap shall be the same size as the trap arm to which it is connected.

2024 UPC - 1003.3 Size.

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7
Q

Fill in the blank

‘S’ traps, bell traps, and crown-vented traps shall be _____.

A

Prohibited

No form of trap that depends for its seal upon the action of movable parts shall be used. No trap that has concealed interior partitions, except those of plastic, glass, or similar corrosion-resisting material, shall be used. “S” traps, bell traps, and crown-vented traps shall be prohibited. No fixture shall be double trapped. Drum and bottle traps shall be installed for special conditions. No trap shall be installed without a vent, except as otherwise provided in this code.

2024 UPC - 1004.1 Prohibited.

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8
Q

Fill in the blank

Each fixture trap shall have a water seal of not less than _____ inches.

A

2 inches

Each fixture trap shall have a liquid seal of not less than 2 inches (51 mm) and not more than 4 inches (102 mm), except where a deeper seal is found necessary by the Authority Having Jurisdiction. Traps shall be set true with respect to their liquid seals and, where necessary, they shall be protected from freezing.

2024 UPC - 1005.0 Trap Seals. 2024 UPC - 1005.1 General.

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9
Q

Fill in the blank

Each fixture trap shall have a water seal of not more than _____ inches.

A

4 inches

Each fixture trap shall have a liquid seal of not less than 2 inches (51 mm) and not more than 4 inches (102 mm), except where a deeper seal is found necessary by the Authority Having Jurisdiction. Traps shall be set true with respect to their liquid seals and, where necessary, they shall be protected from freezing.

2024 UPC - 1005.0 Trap Seals. 2024 UPC - 1005.1 General.

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10
Q

Fill in the blank

Interceptors (clarifiers) for sand and similar heavy solids shall be so designed and located as to be readily accessible for cleaning and shall have a water seal of not less than _____ inches.

A

6 inches

Interceptors (clarifiers) for sand and similar heavy solids shall be so designed and located as to be readily accessible for cleaning and shall have a water seal of not less than 6 inches (152 mm).

2024 UPC - 1009.3 Design.

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11
Q

What is the minimum water seal required for interceptors for sand or other similar heavy solids?

A

6 inches

Interceptors (clarifiers) for sand and similar heavy solids shall be so designed and located as to be readily accessible for cleaning and shall have a water seal of not less than 6 inches (152 mm).

2024 UPC - 1009.3 Design.

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12
Q

Fill in the blank

The use of ladders for the removal of bulky equipment in order to service interceptors (clarifiers) shall constitute a violation of _____.

A

Accessibility

Each interceptor (clarifier) cover shall be readily accessible for servicing and maintaining the interceptor (clarifier) in working and operating condition. The use of ladders or the removal of bulky equipment to service interceptors (clarifiers) shall constitute a violation of accessibility. Location of interceptors (clarifiers) shall be shown on the approved building plan.

2024 UPC - 1009.5 Location

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13
Q

Fill in the blank

A grease trap is not _____ for individual dwelling units or for any private living quarters.

A

Required

A combination of hydromechanical, gravity grease interceptors and engineered systems shall be allowed to meet this code and other applicable requirements of the Authority Having Jurisdiction where space or existing physical constraints of existing buildings necessitate such installations. A grease interceptor shall not be required for individual dwelling units or private living quarters. Water closets, urinals, and other plumbing fixtures conveying human waste shall not drain into or through the grease interceptor.

2024 UPC - 1014.0 Grease Interceptors. 2024 UPC - 1014.1 General.

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14
Q

True or False

There is a preference in the code between gravity grease interceptors, hydromechanical interceptors, and engineered systems.

A

FALSE

A combination of hydromechanical, gravity grease interceptors and engineered systems shall be allowed to meet this code and other applicable requirements of the Authority Having Jurisdiction where space or existing physical constraints of existing buildings necessitate such installations. A grease interceptor shall not be required for individual dwelling units or private living quarters. Water closets, urinals, and other plumbing fixtures conveying human waste shall not drain into or through the grease interceptor.

2024 UPC - 1014.0 Grease Interceptors. 2024 UPC - 1014.1 General.

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15
Q

Fill in the blank

Every fixture that discharges into a gravity grease interceptor must be _____.

A

Individually trapped and vented

Each fixture discharging into a grease interceptor shall be individually trapped and vented in an approved manner.

2024 UPC - 1014.1.1 Trapped and Vented.

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16
Q

Fill in the blank

Gravity grease interceptors complying with IAPMO Z1001 may not be installed anywhere in a building where _____.

A

Food is handled

Each grease interceptor shall be so installed and connected that it shall be easily accessible for inspection, cleaning, and removal of the intercepted grease. A gravity grease interceptor that complies with ANSI/CAN/IAPMO Z1001 shall not be installed in a building where food is handled. Location of the grease interceptor shall meet the approval of the Authority Having Jurisdiction.

2024 UPC - 1014.3.4 Location.

17
Q

Fill in the blank

A gravity interceptor’s volume is determined by using _____.

A

Table 1014.3.6

The volume of the interceptor shall be determined by using Table 1014.3.6. Where drainage fixture units (DFUs) are not known, the interceptor shall be sized based on the maximum DFUs allowed for the pipe size connected to the inlet of the interceptor. Refer to Table 703.2, Drainage Piping, Horizontal.

2024 UPC - 1014.3.6 Sizing Criteria.

18
Q

Fill in the blank

Sand and similar interceptors must have a minimum water seal of _____.

A

6 inches

Sand and similar interceptors for every solid shall be so designated and located as to be readily accessible for cleaning, shall have a water seal of not less than 6 inches (152 mm), and shall be vented.

2024 UPC - 1016.4 Separate Use.

19
Q

Fill in the blank

The waste line in an oil and flammable interceptor must be a minimum of _____ in diameter with a full-size cleanout to grade.

A

3 inches

Repair garages and gasoline stations with grease racks or grease pits, and factories that have oily, flammable, or both types of wastes as a result of manufacturing, storage, maintenance, repair, or testing processes, shall be provided with an oil or flammable liquid interceptor. Floor drains in such locations shall be connected directly to oil and flammable liquid interceptors.

2024 UPC - 1017.1 Interceptors Required.

20
Q

Fill in the blank

A waste line for oil and flammable liquid interceptors must be at least _____ in diameter with a full-size cleanout.

A

3 inches

(4) The waste line shall be not less than 3 inches (80 mm) in diameter with a full-size cleanout to grade.

2024 UPC - 1017.3 Interceptor Details.

Uniform Plumbing Code (UPC) (17 decks)

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