Section 890.1470  Fixture Trap Vents

a)         Distance of Trap From Vent.  Each fixture trap shall have a protecting vent so located that the developed length in the fixture drain from the trap weir to the vent fitting is within the requirements set forth in Appendix A:  Table I. (See Appendix K:  Illustration L.)

b)         Trap Weir.  The vent pipe opening from a soil or waste pipe, except for water closets or fixtures with an integral trap, shall not be below the trap weir.  (See Appendix K:  Illustration M.)