Section 408.30534. Venting.

Section P3105.1 is amended and section 3105.4 and figure P3105.4 are added to the code and figure N3 in appendix N of the code is amended to read as follows:

P3105.1.  Distance of trap from vent.   Each  fixture   trap  shall  have   a protecting vent located so that the slope and the  developed   length  in  the fixture drain from  the trap weir to the vent fitting are within the requirements in table P3105.1 of the code. P3105.4.     Vertical leg for waste                                    fixture     drains.       A    vertical     leg    (see figure P3105.4) is permitted within a fixture drain of  a   waste  fixture  in accordance with the

following criteria:

(1)     Minimum trap diameter shall be in accordance with table P3201.7 of the code.

(2)     The diameter of section A shall be equal to the diameter of the trap.

(3)       The length of section A shall not be less than 8 inches (2032 mm)       and in accordance with table P3105.1 of the code.

(4)     The diameter of section B  shall  be   1  pipe  size   larger  than   the diameter of Section A.

(5)     The length of section B shall not be more than 36 inches (9144 mm).

(6)     The diameter of section C  shall  be   1  pipe  size   larger  than  the diameter of section B.

(7)      The total length of section A and   section  C  shall  not  exceed  the distance allowed in table P3105.1 of the code.

(8)     Bends shall be the diameter of the largest connected section.

History: 2001 AACS; 2004 AACS.; 2008 AACS; 2010 AACS.