Chapter 7

• 152 mm Minimum clearance of galvanized wrought iron or galvanized steel pipe above ground
• 0.30 m Minimum depth of vitrified clay pipes or fittings below the ground
• 2% Allowable grade for the threads of draining fittings
• 6 F.U. Fixture unit rating of clotheswasher in groups of 3.
• 2 F.U. Fixture unit rating for every 0.063 L/s of continuous flow from sump pump or ejector.
• 15 m Intervals of cleanouts on each run of piping more than 15 meters in total developed length.
• less than 1.5 m Length of horizontal drain line where cleanouts may be omitted, except in lines serving sinks or urinals.
• 72° or less Slope of short horizontal drainage pipe where cleanouts may be omitted.
• exceeding 135° Aggregate offset angle to be provided with an additional cleanout.
• 305 mm Front clearance for cleanouts 51 mm or less.
• 450 mm Front clearance for cleanouts larger than 51 mm.
• 0.45m vertical; 0.75m horizontal Clearances from the means of access for cleanouts installed in underground piping.
• 6.1 m Maximum distance of underfloor cleanout from an access door, trap door or crawl hole.
• 50.8 mm Minimum size of pump discharge pipe from a sump having a water closet.
• 51 mm Minimum distance of the invert of the lowest inlet above the high water or "starting" level of sumps and receiving tanks.
• 51 mm dia Minimum size of vent for sumps and receiving tanks.
• 3 kg/m Minimum air pressure to be maintained for each meter of height the sewage is raised
• 2.4 m Distance within the vertical to horizontal change of a stack containing suds-producing fixtures where no drainage connection shall be made.
• 4 Number of water closets or 6 fixture unit-traps allowed on any vertical stack
• 3 Number of water closets or 6 fixture unit-traps allowed on any horizontal branch or drain.
• 32 mm dia Minimum diameter of an individual vent, or not less than ½ of the diameter of the drain.
• 1/3 Fraction of the total permitted length of any vent allowed to be installed in a horizontal position.