Section 890.1510  Stack Venting

One-Bathroom Group.  Except as provided in Section 890.1490(b), a group of fixtures, consisting of one (1) bathroom group and a kitchen sink or combination fixture, may be installed without individual fixture vents, in a one-story building or on the top floor of a building, provided each fixture drain connects independently to the stack and the water closet and bathtub or shower drain enters the stack at the same level and in accordance with the requirement in Appendix A:  Table I.  (See Appendix K:  Illustrations W and X.)