UPC MAXIMUM UNIT LOADING AND MAXIMUM LENGTH OF DRINAGE VENT PIPING

1-1/4 Maximum Unit Drainage Piping, Vertical

1

1-1/4 Maximum Unit Drainage Piping, Horizontal

1

1-1/2 Maximum Unit Drainage Piping, Vertical

2

1-1/2 Maximum Unit Drainage Piping, Horizontal

1

2 Maximum Unit Drainage Piping, Vertical

16

2 Maximum Unit Drainage Piping, Horizontal

8

3 Maximum Unit Drainage Piping, Vertical

48

3 Maximum Unit Drainage Piping, Horizontal

35

4 Maximum Unit Drainage Piping, Vertical

256

4 Maximum Unit Drainage Piping, Horizontal

216

5 Maximum Unit Drainage Piping, Vertical

600

5 Maximum Unit Drainage Piping, Horizontal

428

6 Maximum Unit Drainage Piping, Vertical

1380

6 Maximum Unit Drainage Piping, Horizontal

720

8 Maximum Unit Drainage Piping, Vertical

3600

8 Maximum Unit Drainage Piping, Horizontal

2640

10 Maximum Unit Drainage Piping, Vertical

5600

10 Maximum Unit Drainage Piping, Horizontal

4680

12 Maximum Unit Drainage Piping, Vertical

8400

12 Maximum Unit Drainage Piping, Horizontal

8200

I inch

25 mm

I foot

304.8 mm

Footnote 1

Excluding trap arm

Footnote 2

Except for sinks, urinals, and dishwashers - exceeding 1 fixture unit.

Footnote 3

Except for six-unit traps or water closers.

Footnote 4

Only four water closets or six-unit traps allowed on a vertical pipe or stack, and not to exceed three water closets or six-unit traps on a horizontal branch or drain

Footnote 5

Based on 14 inch per foot (20.8 mm/m) slope. For i of an inch per foot (10.4 mmim) slope, multiply horizontal fixture units by a factor of 0.8.

Footnote 6

The diameter of an individual vent shall be not less than 14inches (32 mi) nor less than one-half the diameter of the drain to which it is connected. Fixture unit load values for drainage and vent piping shall be computed from Table 702.1 and Table 702.2(2) Not to exceed one-third of the total permitted length of a vent shall be permitted to be installed in a horizontal position Where vents are increased one pipe size for their entire length, the maximum length limitations specified in this table do not apply. This table is in accordance with the requirements of Section 901.3.

Horizontal Piping Length is

(unlimited)

1-1/4 Maximum Length Drainage Piping Vertical, (feet)

45

1-1/2 Maximum Length Drainage Piping Vertical, (feet)

65

2 Maximum Length Drainage Piping Vertical, (feet)

85

3 Maximum Length Drainage Piping Vertical, (feet)

212

4 Maximum Length Drainage Piping Vertical, (feet)

300

5 Maximum Length Drainage Piping Vertical, (feet)

390

6 Maximum Length Drainage Piping Vertical, (feet)

510

8 Maximum Length Drainage Piping Vertical, (feet)

750

1-1/4 Vent Piping Horizontal and Vertical, Maximum Units

1

1-1/2, Vent Piping Horizontal and Vertical, Maximum Units

8

2 Vent Piping Horizontal and Vertical, Maximum Units

24

3 Vent Piping Horizontal and Vertical, Maximum Units

84

4 Vent Piping Horizontal and Vertical, Maximum Units

256

5 Vent Piping Horizontal and Vertical, Maximum Units

600

6 Vent Piping Horizontal and Vertical, Maximum Units

1380

8 Vent Piping Horizontal and Vertical, Maximum Units

3600

1-1/4 Vent Piping Horizontal and Vertical, Maximum Lengths, (feet)

41

1-1/2, Vent Piping Horizontal and Vertical, Maximum Lengths, (feet)

60

2 Vent Piping Horizontal and Vertical, Maximum Lengths, (feet)

120

3 Vent Piping Horizontal and Vertical, Maximum Lengths, (feet)

212

4 Vent Piping Horizontal and Vertical, Maximum Lengths, (feet)

300

5 Vent Piping Horizontal and Vertical, Maximum Lengths, (feet)

390

6 Vent Piping Horizontal and Vertical, Maximum Lengths, (feet)

510

8 Vent Piping Horizontal and Vertical, Maximum Lengths, (feet)

750