vent stack's Ф be less than half the Ф of the soil stack it serves . For a 4" soil stack, vents cannot be less than 2" pipe. To determine the length of vent piping, regard length of stack and branches as being continuous.
DRAINAGE AND SEWERAGE SYSTEMS SOIL PIPE – portion of the plumbing system which receives the discharge of water closets WASTE PIPE – part of the drainage system which conveys the discharge of fixtures other than water closets, such as sinks, lavatories, urinals, bathtubs; usually smaller in Ф than soil pipe
DRAINAGE AND SEWERAGE SYSTEMS House Drain, House Sewer, Main Sewer
DRAINAGE AND SEWERAGE SYSTEMS TRAPS USED IN PLUMBING SYSTEM Trap – a device to prevent the passage of sewer air through it; also called anti-siphon traps
DRAINAGE AND SEWERAGE SYSTEMS TRAPS USED IN PLUMBING SYSTEM Two forms of water-sealed traps 1. Common Seal – 2” depth 2. Deep Seal – 4” liquid content Deep seal – 3” minimum , 4” maximum liquid content Types of Permissible Traps 1. P-Trap – ½ S 2. Drum Trap 3. Grease Trap Objectionable Traps/Non-Permissible Traps 1. Full S and ¾ S Traps 2. Bag Trap 3. Mechanically Sealed Trap 4. Internal Partition Trap 5. Light Metal Partition Traps
DRAINAGE AND SEWERAGE SYSTEMS SEAL - vertical distance between the dip and the crown weir of a trap/the water in the trap between the dip and the crown weir TRAP - a fitting or device so constructed as to prevent the passage of air, gas TRAP ARM - that portion of a fixture drain between a trap and the vent TRAP SEAL (WATER SEAL) - maximum vertical depth of liquid that a trap will retain, measured within the crown weir and the top of the dip of the trap
DRAINAGE AND SEWERAGE SYSTEMS P-Trap, Trap Arm
DRAINAGE AND SEWERAGE SYSTEMS Drum Trap, Grease Trap
DRAINAGE AND SEWERAGE SYSTEMS (CLARIFIER) - intercept or to separate, and prevent the passage of oil, grease, sand CLARIFIER - (interceptor) GREASE INTERCEPTOR - interceptor of 3 cubic meters capacity GREASE TRAP - device to retain grease from one to four fixtures (maximum) SAND INTERCEPTOR - (INTERCEPTOR)
DRAINAGE AND SEWERAGE SYSTEMS AIRBREAK - physical separation into indirect waste receptor from fixture, device indirectly connected AIR GAP, DRAINAGE - unobstructed vertical distance between the lowest opening from any pipe to the flood level rim of the receptor AIR GAP, WATER DISTRIBUTION - unobstructed vertical distance through free atmosphere between the lowest opening from any pipe or faucet conveying potable water to the flood-level rim DOUBLE-BEND FITTING - fitting shaped like the “S”
DRAINAGE AND SEWERAGE SYSTEMS INDIRECT WASTE PIPE - a waste pipe that does not connect directly with the building drainage RECEPTOR - approved plumbing fixture/device to adequately receive discharge from indirect waste pipes SPECIAL WASTE - require special methods of handling (use of indirect waste piping and receptors, corrosion resistant piping, sand, oil or grease interceptors, condensers or other pre-treatment facilities
DRAINAGE AND SEWERAGE SYSTEMS Indirect Waste Pipe, Air Gap -Drainage
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- Yoke Vents