Chapter 9

• 15 cm Minimum height of galvanized iron or galvanized steel pipe above the ground
• 152 mm Minimum rise of each vent above the highest flood level rim before offsetting horizontally to join the vent stack or stack vent.
• 1 pipe size increase Increase in size of vent stack above the reconnection point of stack and horizontal vent.
• 15 cm Minimum extension of a vent pipe above the roof or fire wall
• 0.30 m Minimum clearance of a vent through roof from any vertical surface nearby.
• 3 m Horizontal distance of a vent opening away from any openable window, door opening, air intake or vent shaft.
• 0.90 m Vertical distance of a vent opening above any openable window, door opening, air intake or vent shaft.
• 0.90 m Horizontal distance of a vent opening away from any lot line, alley and street boundary lines.
• 3 m Horizontal distance of vertical vent away from any part of the roof that is used for other purposes.
• 2.1 m Vertical extension of a vent above any roof that is used for other purposes.
• 10 Each soil or waste stack which extends or more stories above the building drain shall be served by a parallel vent stack.
• every 5 floors Intervals of yoke vent.
• not less than 1 m Yoke vent connection with the vent stack above the floor level.
• 32 mm Minimum size of an individual vent, or not less than 1/2 the diameter of the drain to which it is connected.
• 1/3 Fraction of the total permitted length of any vent allowed to be installed in a horizontal position.