A Plumbing Materials, Equipment, Use Restrictions and Applicable Standards

Section 885 Section 890.APPENDIX A Plumbing Materials, Equipment, Use Restrictions and Applicable Standards Section 890.TABLE K Size and Length of Vents Size of Soil or Waste Stack Fixture Units Connected Diameter of Vent Required (Inches) 1¼ 1½ 2 2½ 3 4 5 6 8 Maximum Length of Vent (Feet) 1¼ 2 30 1½ 8 50 150 1½ 10 30 100 2 12 30 75 200 2 20 26 50 150 2½ 42 30 100 300 3 10 30 100 200 600 3 30 60 200 500 3 60 50 60 400 4 100 35 100 260 1,000 4 200 30 90 250 900 4 500 20 70 180 700 5 200 35 80 350 1,000 5 500 30 70 300 900 5 1,100 20 50 200 700 6 350 25 50 200 400 1,300 6 620 15 30 125 300 1,100 6 960 24 100 250 1,000 6 1,900 20 70 200 700 8 600 50 150 500 1,300 8 1,400 40 100 400 1,200 8 2,200 30 80 350 1,100 9 3,600 25 60 250 800 10 1,000 75 125 1,000 10 2,500 50 100 500 10 3,800 30 80 350 10 5,600 25 60 250 Agency Note:  Per Section 890.1580(e), no more than 20 percent of the maximum developed length may be installed in the horizontal position. Vent piping serving floor drains shall be installed in such a manner as to minimize horizontal vent distances.