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2021 Uniform Plumbing Code Study Guide > SIZING: DFU, WSFU, VENT, BTU > Flashcards

SIZING: DFU, WSFU, VENT, BTU Flashcards

1
Q

Maximum units for 1-1/4” drainage piping if draining vertically

A

1 Unit

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2
Q

Maximum units for 1-1/4” drainage piping if draining horizontally

A

1 Unit

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3
Q

Maximum units for 1-1/2” drainage piping if draining vertically

A

2 units (Except sinks, urinals, and dishwashers exceeding 1 fixture unit)

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4
Q

Maximum units for 1-1/2” drainage piping if draining horizontally

A

1 unit

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5
Q

Maximum units for 2” drainage piping if draining vertically

A

16 units (except six-unit traps or water closets)

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6
Q

Maximum units for 2” drainage piping if draining horizontally

A

8 units (except six-unit traps or water closets)

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7
Q

Maximum units for 3” drainage piping if draining vertically

A

48 units (only 4 water closets or six-unit traps allowed on a vertical pipe or stack)

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8
Q

Maximum units for 3” drainage piping if draining horizontally

A

35 units (not to exceed 3 water closets or six-unit traps on a horizontal branch or drain)

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9
Q

Maximum units for 4” drainage piping if draining horizontally

A

216 units (based on 1/4” per foot slope. For 1/8” per foot slope, multiply fixture units by a factor of 0.8)

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10
Q

Maximum units for 4” drainage piping if draining vertically

A

256 units

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11
Q

True or False: There is no maximum length for drainage piping in a horizontal orientation.

A

True. Maximum horizontal length for drainage piping is unlimited.

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12
Q

What is the maximum length allowed for 1-1/4” drainage piping in a vertical orientation?

A

45 feet

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13
Q

What is the maximum length allowed for 1-1/2” drainage piping in a vertical orientation?

A

65 feet

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14
Q

What is the maximum length allowed for 2” drainage piping in a vertical orientation?

A

85 feet

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15
Q

What is the maximum length allowed for 3” drainage piping in a vertical orientation?

A

212 feet

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16
Q

What is the maximum length allowed for 4” drainage piping in a vertical orientation?

A

300 feet.

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17
Q

True or false?
In vent piping, both the horizontal and vertical carry the same values for maximum length and maximum units.

A

True.

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18
Q

Maximum venting units for 1-1/4” pipe?

A

1 unit

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19
Q

Maximum venting units for 1-1/2” pipe?

A

8 units. (Except six-unit traps or water closets)

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20
Q

Maximum venting units for 2” pipe?

A

24 units

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21
Q

Maximum venting units for 3” pipe?

A

84 units

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22
Q

Maximum venting units for 4” pipe?

A

256 units (same as the vertical drainage units for 4”)

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23
Q

Maximum length in feet for 1-1/4” vent piping

A

45 feet

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24
Q

Maximum length in feet for 1-1/2” vent piping

A

60 feet

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25
Q

Maximum length in feet for 2” vent piping

A

120 feet

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26
Q

Maximum length in feet for 3” vent piping

A

212 feet

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27
Q

Maximum length in feet for 4” vent piping

A

300 feet

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28
Q

Maximum DFU for a trap and trap arm in 1-1/4”

A

1unit

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29
Q

Maximum DFU for a trap and trap arm in 1-1/2”

A

3 units

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30
Q

Maximum DFU for a trap and trap arm in 2”

A

4 units

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31
Q

Maximum DFU for a trap and trap arm in 3”

A

6 units

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32
Q

Maximum DFU for a trap and trap arm in 4”

A

8 units

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33
Q

What is the equivalent fixture unit value for “Up to 7-1/2 GPM” in intermittent discharge capacity?

A

Equals 1 fixture unit

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34
Q

What is the equivalent fixture unit value for “greater than 7-1/2 to 15 GPM” in intermittent discharge capacity?

A

Equals 2 fixture units

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35
Q

What is the equivalent fixture unit value for “greater than 15 to 30 GPM” in intermittent discharge capacity?

A

Equals 4 fixture units

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36
Q

What is the equivalent fixture unit value for “greater than 30 to 50 GPM” in intermittent discharge capacity?

A

Equals 6 fixture units.

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37
Q

What is the minimum size trap and trap arm for a bathtub or combination bath/shower?

A

1-1/2”

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38
Q

What is the minimum size trap and trap arm for a clothes washer, domestic, standpipe?

A

2”

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39
Q

What is the minimum size trap and trap arm for a drinking fountain or water cooler?

A

1-1/4”

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40
Q

What is the minimum size trap and trap arm for a floor drain?

A

2”

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41
Q

What is the minimum size trap and trap arm for a shower?

A

2”

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42
Q

What is the minimum size trap and trap arm for a lavatory?

A

1-1/4”

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43
Q

What is the minimum size trap and trap arm for a bar sink?

A

1-1/2”

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44
Q

What is the minimum size trap and trap arm for a commercial sink with food waste?

A

1-1/2”

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45
Q

What is the minimum size trap and trap arm for a kitchen sink, domestic?

A

1-1/2”

46
Q

What is the minimum size trap and trap arm for a laundry sink?

A

1-1/2”

47
Q

What is the minimum size trap and trap arm for a urinal, integral trap?

A

2”

48
Q

What is the minimum size trap and trap arm for a water closet?

A

3”

49
Q

What is the drainage fixture unit value for a bathtub or combination bath/shower?

A

2.0 DFU

50
Q

What is the drainage fixture unit value for a bidet with a 1-1/4” trap?

A

1 DFU

51
Q

What is the drainage fixture unit value for a bidet with a 1-1/2” trap?

A

2.0 DFU

52
Q

What is the drainage fixture unit value for a clothes washer, domestic, standpipe?

A

3.0 DFU

53
Q

What is the drainage fixture unit value for a dishwasher, domestic, with independent drain?

A

2.0 DFU

54
Q

What is the drainage fixture unit value for a drinking fountain/water cooler?

A

0.5 DFU

55
Q

What is the drainage fixture unit value for floor drain?

A

2.0 DFU

56
Q

What is the drainage fixture unit value for shower, single-head trap?

A

2.0 DFU

57
Q

What is the drainage fixture unit value for each additional shower head in a multi-head shower?

A

1.0 DFU

58
Q

What is the drainage fixture unit value for a lavatory?

A

1.0 DFU

59
Q

What is the drainage fixture unit value for a bar sink?

A

1.0 DFU

60
Q

What is the drainage fixture unit value for a kitchen sink?

A

2.0 DFU

61
Q

What is the drainage fixture unit value for a laundry sink?

A

2.0 DFU

62
Q

What is the drainage fixture unit value for a urinal?

A

2.0 DFU

63
Q

What is the drainage fixture unit value for a water closet with a 1.6GPF tank or flushometer valve?

A

3.0 private, 4.0 public

64
Q

What is the drainage fixture unit value for a water closet with a greater than 1.6 GPF tank or flushometer valve?

A

4.0 private, 6.0 public

65
Q

What is the minimum allowed fixture branch pipe size, in inches, for a bathtub or combination bath/shower?

A

1/2”

66
Q

What is the minimum allowed fixture branch pipe size, in inches, for a bidet?

A

1/2”

67
Q

What is the minimum allowed fixture branch pipe size, in inches, for a clothes washer?

A

1/2”

68
Q

What is the minimum allowed fixture branch pipe size, in inches, for a dishwasher?

A

1/2”

69
Q

What is the minimum allowed fixture branch pipe size, in inches, for a drinking fountain or water cooler?

A

1/2”

70
Q

What is the minimum allowed fixture branch pipe size, in inches, for a hose bibb?

A

1/2”

71
Q

What is the minimum allowed fixture branch pipe size, in inches, for a lavatory?

A

1/2”

72
Q

What is the minimum allowed fixture branch pipe size, in inches, for any kind of sink?

A

1/2”

73
Q

What is the minimum allowed fixture branch pipe size, in inches, for a shower head?

A

1/2”

74
Q

What is the minimum allowed fixture branch pipe size, in inches, for a urinal with a flushometer valve?

A

3/4”

75
Q

What is the minimum allowed fixture branch pipe size, in inches, for a urinal with a flush tank?

A

1/2”

76
Q

What is the minimum allowed fixture branch pipe size, in inches, for a tank-style water closet?

A

1/2”

77
Q

What is the minimum allowed fixture branch pipe size, in inches, for a water closet, flushometer valve?

A

1”

78
Q

What is the Water Supply Fixture Unit value for a bathtub or combination bath/shower?

A

4.0 WSFU

79
Q

What is the Water Supply Fixture Unit value for a bidet?

A

1.0 WSFU

80
Q

What is the Water Supply Fixture Unit value for a clothes washer?

A

4.0 WSFU

81
Q

What is the Water Supply Fixture Unit value for a dishwasher, domestic?

A

1.5 WSFU

82
Q

What is the Water Supply Fixture Unit value for a drinking fountain or water cooler?

A

0.5 WSFU

83
Q

What is the Water Supply Fixture Unit value for a hose Bibb?

A

2.5 WSFU

84
Q

What is the Water Supply Fixture Unit value for each additional hose Bibb?

A

1.0 WSFU

85
Q

What is the Water Supply Fixture Unit value for a lavatory?

A

1.0 WSFU

86
Q

What is the Water Supply Fixture Unit value for a bar sink?

A

1.0 private, 2.0 public

87
Q

What is the Water Supply Fixture Unit value for a kitchen sink, with or without dishwasher?

A

1.5 WSFU

88
Q

What is the Water Supply Fixture Unit value for a laundry sink?

A

1.5 WSFU

89
Q

What is the Water Supply Fixture Unit value for a shower, per head?

A

2.0 WSFU

90
Q

What is the Water Supply Fixture Unit value for a flush tank urinal?

A

2.0 WSFU

91
Q

What is the Water Supply Fixture Unit value for a 1.6. GPF tank water closet?

A

2.5 WSFU

92
Q

What is the WSFU value for 1 water closet flushometer valve?

A

40 WSFU

93
Q

When there are 2 water closet flushometer valves, what is the WSFU value of the second valve?

A

30 WSFU

94
Q

When there are 3 water closet flushometer valves, what is the WSFU value of the third valve?

A

20 WSFU

95
Q

When there are 4 water closet flushometer valves, what is the WSFU value of the fourth valve?

A

15 WSFU

96
Q

When there are 5 or more water closet flushometer valves, what is the WSFU value of the fifth, and each additional valve?

A

10 WSFU each

97
Q

What is the WSFU value for 1 urinal with a flushometer valve?

A

20 WSFU (which is half the value of a WC Flushometer valve)

98
Q

When there are 2 urinal flushometer valves, what is the WSFU value of the second valve?

A

15 WSFU

99
Q

When there are 3 urinal flushometer valves, what is the WSFU value of the third valve?

A

10 WSFU

100
Q

When there are 4 urinal flushometer valves, what is the WSFU value of the fourth valve?

A

8 WSFU

101
Q

When there are 5 or more urinal flushometer valves, what is the WSFU value for the fifth, and each additional valve?

A

5 WSFU each

102
Q

What is the approximate BTU/H input for a single-family warm air furnace, according to table 1208.4.1?

A

100,000 btu/h

103
Q

What is the approximate BTU/H input for a multi-family warm air furnace, per unit, according to table 1208.4.1?

A

60,000 btu/h

104
Q

What is the approximate BTU/H input for a single-family hydronic boiler, according to table 1208.4.1?

A

100,000 btu/h

105
Q

What is the approximate BTU/H input for a 30 to 40 gallon tank water heater, according to table 1208.4.1?

A

35,000 Btu/h

106
Q

What is the approximate BTU/H input for a 50 gallon tank water heater, according to table 1208.4.1?

A

50,000 Btu/h

107
Q

What is the approximate BTU/H input for a domestic range, according to table 1208.4.1?

A

65,000 Btu/h

108
Q

What is the approximate BTU/H input for a gas refrigerator , according to table 1208.4.1?

A

3000 Btu/h

109
Q

What is the approximate BTU/H input for a clothes dryer, according to table 1208.4.1?

A

35,000 Btu/h

110
Q

What is the approximate BTU/H input for a gas fireplace, direct vent, according to table 1208.4.1?

A

40,000 Btu/h

111
Q

What is the approximate BTU/H input for a gas log, according to table 1208.4.1?

A

80,000 Btu/h

112
Q

What is the approximate BTU/H input for a barbecue, according to table 1208.4.1?

A

40,000 Btu

2021 Uniform Plumbing Code Study Guide (17 decks)

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