Vent- A pipe or opening used for ensuring the circulation of air in a plumbing system and for reducing the pressure exerted on trap seals. Vent Stack- a vertical pipe that doesn't carry any waste and its main purpose is to regulate air pressure throughout the plumbing system; usually runs parallel with the soil or waste stack and may either extend up through the roof or connect to a stack vent Stack Vent- an extension of a soil or waste stack above the highest horizontal drain connected to the stack. Unit Vent- an arrangement of venting so installed that one vent pipe will serve two (2) traps. Wet Vent- that portion of a vent pipe through which liquid waste flow. Branch Vent- a vent pipe connecting from a branch of the drainage system to a vent stack. Relief Vent- a vent the primary (Fresh Air Inlet) function of which is to provide circulation of air between drainage and vent system.
Roughing-In- the installation of all pipes in the plumbing system that are in partitions and under floors. Sump- a pit or receptacle at a low point to which the liquid wastes are drained. Sleeve- a sheet metal placed when concrete is poured to accommodate future plumbing pipes. Pipe Chase - an opening or space to accommodate a group of pipes. DRAIN-WASTE-VENT-SYSTEM -Network of pipes that transport wastewater and sewer gases from the building
PLUMBING UNIT -The minimum standard quantifies of plumbing fixtures that discharge waste into a plumbing installation include;CONDITIONS FOR PROPER DWV -The piping must be air-tight, gas-tight, and water-tight -Each plumbing fixture, except those with integral traps, shall be separately trapped with an approved water seal trap type. This is to prevent odor-laden and germ-laden air to rise out of the drainage system and contaminate the surrounding air in the room -Each plumbing fixture trap shall be provided with vent pipes. This is to protect the drainage system against siphonage and back pressure and to assure air circulation throughout the drainage system. -A cleanout, easily accessible, shall be provided for inspection or cleaning of the pipe run. The location of the cleanout shall be: oAt the upper end of every horizontal waste or soil pipe oAt every change of horizontal direction of more than 22.5O oWithin 1.50m inside the property line before the house sewer connection oAt every 15m to a horizontal run of a soil or waste pipe -All horizontal piping shall be run in practical alignment and at a uniform grade of not less than 2% toward the point of disposal -All horizontal piping shall be supported and anchored at intervals not to exceed 3.0m -Vertical piping shall be secured at sufficiently close intervals to keep the pipe in alignment. Stacks shall be properly supported at their bases.
TRAPS -Every plumbing fixture that accepts wastewater must have a p-trap.