part of the plumbing system which receives the discharge of all soil and waste stacks within the building and conveys it to the house sewer (referred to as the collection line)

a device placed in the house drain immediately inside the foundation wall of the building; serves as barrier; prevents gases which occur in the public sewers from circulating through the plumbing system.

takes the waste water from the plumbing fixtures and deliver it to the sewer

water supply, liquids, substances and other ingredients (water, liquid, and other carried wastes); the fixture, fixture traps; the soil, waste, vent pipes; house drain, foundation drain, house sewer; storm water drainage, drainage ejectors, appurtenances and connections

- (construction, collection, transportation, pumping treatment and final disposition of sewage

underground system; cannot

drain by gravity into the building sewer

underground drainpipe; receives only subsurface or seepage water and convey it to a sump for disposal by gravity flow or by lift pump

lowest horizontal

piping of drainage system; conveys to the building

sewer beginning 0.6 m. outside the building wall

starts at the

end of the building drain

part of the lowest horizontal piping of a plumbing system; conveys it to the house sewer

part of plumbing system extending from about 4 or 5’ from inner face of foundation wall

one fixture unit equivalent to a flow rate of 7 ½ gallons of water per min; 28.3 liters per min (1 cu.ft/minute)

minimum standard quantity of one (1) water meter, one (1) water closet, one (1) lavatory, one (1) shower head and drain for a bathtub or shower stall, one (1) kitchen sink, one (1) laundry tray and three (3) floor drains and four (4) faucets/hose bib

the drain from the trap of a fixture to the junction of the drain

a device to prevent the passage of sewer air through it; also called anti-siphon traps

vertical distance between the dip and the crown weir of a trap/the water in the trap between the dip and the crown weir

a fitting or device so constructed as to prevent the passage of air, gas

that portion of a fixture drain between a trap and the vent

maximum vertical depth of liquid that a trap will retain, measured within the crown weir and the top of the dip of the trap

portion of the plumbing system which receives the discharge of water closets

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

approved plumbing fixture/device to adequately receive discharge from indirect waste pipes

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

intercept or to separate, and prevent the passage of oil, grease, sand

interceptor of 3 cubic meters capacity

device to retain grease from one to four fixtures (maximum)

(INTERCEPTOR)

- physical separation into indirect waste receptor from fixture, device indirectly connected

unobstructed vertical distance between the lowest opening from any pipe to the flood level rim of the receptor

unobstructed vertical distance through free atmosphere between the lowest opening from any pipe or faucet conveying potable water to the flood-level rim

fitting shaped like the “S”

a waste pipe that does not connect directly with the building drainage

inadequate ventilation of the trap/subsequent (-) and (+) pressures

improper atmospheric conditions due to insufficient ventilation, or incorrect installation of fittings

wastes of the plumbing system contain chemical elements creating compounds of acid nature detrimental to piping materials

minus pressure in the drainage system

plus pressure; blows the water out of the fixture into the room; at those located at the base of soil stacks, or a soil pipe changes its direction abruptly.

use of deep seal trap recommended to prolong the interval of total loss of the trap seal

a suspension of a foreign object (rag, string, lint) into the trap seal

wind passing over the top of soil pipe roof terminal; a downdraft ripples the liquid content

found in unventilated traps serving oval- bottomed fixtures (lavatory, slop sink); result of unequal atmospheric conditions caused by the rapid flow of water to the trap

the result of a minus ressure in the waste piping caused by discharge of water from a fixture installed on a line which serves a fixture placed at lower elevation

the result of a minus pressure in the waste piping caused by discharge of water from a fixture installed on a line which serves a fixture placed at lower elevation

used to ventilate the soil and waste pipes portion of the soil-pipe stack above the highest installed fixture branch extending through the roof.

the extension of a soil or waste stack above the highest horizontal drain connected to the stack (SVTR).

“relief” and “yoke” vents; tributary; collecting vent line; relieves any back-pressure; terminates in the soil-pipe stack, at least 3’ above the highest installed fixture branch size: 2 – 5” Ф.

vertical vent pipe.

principal artery

provide flow of air to or from a drainage system; provide a circulation of air to protect traps seals from siphonage and backpressure

a pipe or opening used for ensuring the circulation of air in a plumbing system; for reducing the pressure exerted on trap seals

horizontal wet venting of one or more sinks/floor drains by a common horizontal waste and vent pipe

drain connecting the compartments of a set of fixtures to a trap or connecting other permitted fixtures to a common trap

a suction created by the flow of liquids in pipes (pressure less than atmospheric)

an air pressure less than atmospheric (SIPHONAGE)

(Chapter 9 Sec. 903 Materials, NPCP)

(Chapter 9 Sec. 904 Size of Vents, NPCP)

& Connections: Vent pipe must be graded slightly so that no water may accumulate in it. (Chapter 9 Sec. 905 Vent Pipe Grades and Connections, NPCP)

back vent; serves a single trap

ventilates two fixture traps; discharge into a sanitary cross with deflectors

ventilates 2 or more fixture traps that discharge into a horizontal soil or waste branch extended at slight grade

eliminates minus and plus pressures in the drainage system; on long vertical pipes, a relief vent, often referred to as yoke or by-pass vent maybe installed at 3 – 5 floor intervals

vent pipe through which wastes flow

used on fixtures located in the room away from partitions that might be utilized to conceal the waste and vent.

a conduit/pipe shaft used to convey foul odours from a fixture or room; used to some extent in connection with water closets; terminates at the roof

used for underground public restrooms

connects directly with an individual trap underneath/behind the fixture (INDIVIDUAL VENT/REVENT PIPE)

INDIVIDUAL

an arrangement of venting so installed that one vent pipe will serve two traps

a horizontal vent pipe connecting from a branch of the drainage system to a vent stack or stack vent

a vent that does not carry water or water borne waste

portion of a vent pipe through which liquid waste flow

a pipe or shaft serving to convey foul air from a plumbing fixture or a room to the outer air

group vent from in front of the last fixture/connects to vent stack (LOOP VENT)

acts as auxiliary vent (“yoke vent”)

(extension is usually vertical immediately beyond its connection to the soil or waste pipe); connected to the stack vent

pipe connecting upward from a soil or waste stack below the floor and below horizontal connection to a adjacent vent stack

Minimum requirement for a waste and vent pipe installation: Installation consisting of a WC, LAV, SINK, a BT on first floor, and LT in basement with a drain, soil waste, and vent pipe arrangement

Maximum requirements: Layout of a drain, soil waste, and vent pipe installation

Individual Ventilation: Layout consisting of a WC, LAV, & Sink on first floor; WC, LAV & BT on 2nd floor; LT located in basement

Plumbing for a duplex: WC, LAV, (2) LT in basement, toilet on 1st and 2nd Flr - WC, LAV and BT are installed. Sink provided in each kitchen

Typical installation of a soil and waste stack in a 3 storey apartment building: wet ventilation of the bathroom groups is employed

Fixtures discharging into sanitary crosses wasted and vented: Installation consists of a soil pipe serving 4 complete bathrooms and a sink waste on which 4 sinks are installed for two-storey apartment buildings

Unit waste and vent applied to bathroom fixture groups on opposite sides of a partition typical of hotel and apartment house layouts

Installation common to multi-storey apartment and hotel buildings

Waste and vent pipe installation for small toilet room on each floor of a 2-storey industrial building; lower floor men’s toilet room (5 WCs 2 LAVs, 2 URs located on common partition; upper floor – ladies’ toilet room (5 WCs, 4 LAVs) located on one partition

Common to buildings of larger design: Women’s toilet room (2nd Flr), Men’s toilet room (1st Flr) fixtures located on opposite partitions