Chapter 10

• 1 Maximum number of trap/s permitted on a trap arm
• 3 Number of single compartment sinks or laundry tubs of the same depth, or lavatories that can be serve by one trap.
• 0.75 m Maximum center-to-center distance of adjacent fixtures being served by a single trap.
• 2 times trap diameter Minimum horizontal distance of a trap arm to vent.
• more than 90° Trap arm change of direction not requiring a cleanout
• Less than 22½° For trap arms 76 mm ® and larger, the change of direction not requiring a cleanout.
• 1.8 m max. Developed length between the trap of a water closet from the top of closet ring to inner edge of vent.
• GA 17 (1.1 mm) Minimum thickness of exposed and readily accessible drawn brass tubing trap.
• 1 Maximum number of slip joint that may be used on the outlet side of a trap.
• 51 mm to 102 mm Depth of trap seals
• 152 mm Minimum water seal for sand interceptors and similar clarifiers.
• 1.3 L/s to 3.4 L/s Rate of flow of an individual grease trap.
• 2-1/2 The total capacity of fixtures discharging into a grease trap shall not exceed times than the flow rate of the grease trap.
• 4 Maximum number of fixtures connected to one grease trap.
• 1.2 m Maximum horizontal distance between the fixture outlet and the grease trap, so grease trap may serve as fixture trap.
• 0.75 m Maximum vertical tailpipe or drain between the fixture outlet and the grease trap, so grease trap may serve as fixture trap.
• 51 mm Minimum water seal for grease trap
• 12.7 mm or larger Size of solids to be screened from laundry discharge by means removable wire basket.
• 76 mm dia Minimum outlet size of a sand interceptor.
• 0.2 m2 Minimum net opening dimension of the inlet section of a sand interceptor.
• 610 mm The minimum depth of sand interceptor under the invert of the outlet pipe.
• 0.09 m Increase in the area of inlet section for each 18.9 LPM or fraction thereof over 75.7 LPM.
• 50% of the inlet section Minimum area of sand interceptor outlet section.