Sanitary System Only
| |||||
---|---|---|---|---|---|
Fixture Units
|
1/8 inch to 1 foot
(diameter in inches)
|
1/4 inch to 1 foot
(diameter in inches)
|
1/2 inch to 1 foot
(diameter in inches)
|
Number of Water Closets or Equivalent
| |
6 to 12
|
4
|
3
|
—
|
1 to 2
| |
13 to 24
|
4
|
4
|
3
|
3 to 4
| |
25 to 72
|
6
|
5
|
4
|
5 to 12
| |
73 to 300
|
8
|
6
|
5
|
13 to 50
| |
301 to 720
|
8
|
8
|
6
|
51 to 120
| |
721 to 1,080
|
10
|
10
|
8
|
121 to 180
| |
1,081 to 1,920
|
12
|
12
|
10
|
181 to 320
|
Stormwater System Only
| ||||
---|---|---|---|---|
Number of Square Feet Drained Area
|
1/8 inch to 1 foot
(diameter in inches)
|
1/4 inch to 1 foot
(diameter in inches)
|
1/2 inch to 1 foot
(diameter in inches)
| |
Up to 90
|
1 1/2
|
1 1/2
|
1 1/2
| |
91 to 400
|
3
|
2
|
2
| |
401 to 660
|
3
|
3
|
2
| |
661 to 1,200
|
4
|
3
|
3
| |
1,201 to 1,800
|
4
|
4
|
3
| |
1,801 to 2,500
|
5
|
4
|
4
| |
2,501 to 4,100
|
5
|
5
|
4
| |
4,101 to 4,600
|
6
|
5
|
5
| |
4,601 to 5,300
|
6
|
6
|
5
| |
5,301 to 7,500
|
8
|
6
|
6
| |
7,501 to 11,100
|
8
|
8
|
6
| |
11,101 to 15,700
|
10
|
8
|
8
| |
15,701 to 19,500
|
10
|
10
|
8
| |
19,501 to 24,800
|
12
|
10
|
8
| |
24,801 to 31,000
|
12
|
12
|
10
| |
31,001 to 44,000
|
14
|
12
|
10
| |
44,001 to 60,000
|
14
|
14
|
12
|