7.5.6.3. (1) (c) and (2) (1) Except as provided in Sentences (2) and (3), a vent pipe that protects a fixture trap shall be located so that, (c) the trap arm does not have a cumulative change in direction of more than 135°. (2) The trap arm of water closets, of S-trap standards or of any other fixture that also discharges vertically and depends on siphonic action for its proper functioning shall not have a cumulative change in direction of more than 225° give me simple and basic drawing for student Sketch not much detailed without any measurments and al See more