Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Table 382.31-1
Maximum Developed Length Between Vent and Trap (in feet)
Diameter of Fixture Draina (inches) | Vent Connecting to Horizontal Drain Piping | Vent Connecting to Vertical Drain Piping | |||||||
by means of a Sanitary Tee Fitting | by means of a Wye Pattern Fittingb | ||||||||
Pitch of Fixture Drain (inch per foot) | Pitch of Fixture Drain (inch per foot) | Pitch of Fixture Drain (inch per foot) | |||||||
1/8 | 1/4 | 1/2 | 1/8 | 1/4 | 1/2 | 1/8 | 1/4 | 1/2 | |
11/4 | NPc | 5.0 | 2.5 | NP | 3.5 | 2.0 | NP | 1.5 | 1.0 |
11/2 | NP | 6.0 | 3.0 | NP | 5.0 | 3.0 | NP | 4.0 | 2.0 |
2 | NP | 8.0 | 4.0 | NP | 6.0 | 4.0 | NP | 4.5 | 4.0 |
3 | 24 | 12.0 | 6.0 | 10.0 | 8.0 | 6.0 | 8.0 | 6.0 | 6.0 |
4d | 32 | 16.0 | 8.0 | 12.0 | 10.0 | 8.0 | 10.0 | 8.0 | 8.0 |
a Diameters to be selected on the basis of the smallest drain pipe installed downstream from the trap serving a particular fixture.
b The wye pattern fitting refers to a tee-wye fitting, a combination wye and eighth bend fitting or a wye and eighth bend combination of fittings with no more than one inch between the wye fitting and eighth bend fitting.
c NP means Not Permitted.
d The maximum developed length for fixture drains larger than 4 inches in diameter shall be approved by the department.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: For explanatory material refer to ch. SPS 382 Appendix A-382.31 (13).
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Table 382.31-2
Size and Length of Vent Stacks and Stack Vents
Diameter of Drain Stack at Base (inches) | Maximum Developed Length of Vent (feet) | |||||||||
Diameter of Vent (inches) | ||||||||||
11/4 | 11/2a | 2 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | |
11/2 | 50 | 150 | NLb | |||||||
2 | NPc | 50 | 150 | NL | ||||||
3 | NP | 50 | 400 | NL | ||||||
4 | NP | 20 | 180 | 700 | NL | |||||
5 | NP | 50 | 200 | 700 | NL | |||||
6 | NP | 20 | 70 | 200 | 700 | NL | ||||
8 | NP | 25 | 60 | 250 | 800 | NL | ||||
10 | NP | 25 | 60 | 250 | 800 | NL | ||||
12 | NP | 25 | 100 | 300 | 900 |
a Not more than 2 water closets or similar flush action type fixtures of 4 or more drainage fixture units.
b NL means No Limit.
c NP means Not Permitted
Table 382.31-3
Minimum Diameters And Maximum Length Of Individual, Common, Branch And Cir cuit Vents And Vent Headers
Drainage Fixture Units (dfu) | Maximum Developed Length of Vent (feet) | ||||||||
Diameter of Vent (inches) | |||||||||
11/4a | 11/2b | 2 | 3 | 4 | 5 | 6 | 8 | 10 | |
2 | 50 | NLc | |||||||
4 | 40 | 200 | NL | ||||||
8 | NPd | 150 | 250 | NL | |||||
10 | NP | 100 | 200 | NL | |||||
24 | NP | 50 | 150 | NL | |||||
42 | NP | 30 | 100 | 500 | NL | ||||
72 | NP | 50 | 400 | NL | |||||
240 | NP | 40 | 250 | NL | |||||
500 | NP | 20 | 180 | 700 | NL | ||||
1100 | NP | 50 | 200 | 700 | NL | ||||
1900 | NP | 20 | 70 | 200 | 700 | NL | |||
3600 | NP | 25 | 60 | 250 | 800 | NL | |||
5600 | NP | 25 | 60 | 250 | 800 |
a No water closets permitted.
b Not more than 2 water closets or similar flush action type fixtures of 4 or more drainage fixture units.
c NL means No Limit.
d NP means Not Permitted
Table 382.31-4
Size and Length of Vents for Sanitary Sumps
Discharge Capacity of Ejector (gpm) | Maximum Developed Length of Venta(feet) | ||||
Diameter of Vent (inches) | |||||
11/4d | 11/2d | 2 | 3 | 4 | |
10 | NLb | ||||
20 | 270 | NL | |||
40 | 72 | 160 | NL | ||
60 | 31 | 75 | 270 | NL | |
80 | 16 | 41 | 150 | NL | |
100 | 10 | 25 | 97 | NL | |
150 | NPc | 10 | 44 | 370 | NL |
200 | NP | 20 | 210 | NL | |
250 | NP | 10 | 132 | NL | |
300 | NP | 10 | 88 | 380 | |
400 | NP | 44 | 210 | ||
500 | NP | 24 | 130 |
a The developed length of the vent is measured along the pipe from the connection to the sump, to the point where it connects to a vent pipe of a lar ger diameter.
b NL means No Limit.
c NP means Not Permitted.
d Diameter not permitted for exterior sumps.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Table 382.31-5
Stack Sizing by DFU Value
Drainage Fixture Unit (dfu) Value | Size of Stack (inches) |
0.5 | 11/2 |
1.0 | 2 |
2.0 | 3 |
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 Appendix for further explanatory material.
Note: See ch. SPS 382 appendix for further explanatory material.
Note: For specific applications not listed, please contact DSPS Division of Industry Services at P.O. Box 7162, Madison, WI 53707-7162; or at telephone (608) 266-2112 or (877) 617-1565 or 711 (Telecommunications Relay); or at the Division's Website at http://dsps.wi.gov/programs/industry-services.
Note: Does not include closets or bathrooms with solid doors in accordance with Standard International Building Code s. 508.2.3.
Table 382.31-6
Maximum Developed Distance of Vent to Connection of AAV in Feet | |||
Maximum DFUs | Diameter in Inches | ||
1-1/4a | 1-1/2 | 2 | |
1 | 35 | NLb | NLb |
3 | 28 | 140 | NLb |
6 | NPc | 100 | 200 |
20 | NPc | 60d | 110 |
160 | NPc | NPc | 25 |
a Drainage Fixture Units based on ch. SPS 382.
b NL means no limit.
c NP means not permitted.
d Not more than two water closets or similar type fixtures of four or more drainage fixture units.
Note: The distance is measured from termination of the vent pipe to the point specified in the rule.
Wis. Admin. Code Department of Safety and Professional Services § SPS 382.31