National Plumbing Code of the Philippines

(Chapter 2 – Plumbing Terms/Definitions)

ABS

Acrylonitrile Butadiene Styrene; black pipe

ALLEY

2 – 3 meters

ALTER OR ALTERATION

change, addition, modification

ACCESSIBLE

without obstruction

AIRBREAK

physical separation

AIR GAP, DRAINAGE

unobstructed vertical distance between lowest opening (waste) to flood level rim

AIR GAP, WATER DISTRIBUTION

unobstructed vertical distance between lowest opening (potable water) to flood level rim

AUTHORITY, ADMINISTRATIVE

administer /enforce NPCP

BACKFLOW

water from any source other than regular source

BACKFLOW CONNECTION

reverse flow can occur

BACKPRESSURE BACKFLOW

increased reverse pressure above the supply pressure

BACKFLOW PREVENTER

vacuum breaker

BACK SIPHONAGE

backflow/negative pressure

BACKWATER VALVE

(drainage system); prevent reverse flow

BACKVENT PIPE

individual vent; revent pipe

BALL COCK

valve of an attached ball floating (input)

BALL JOINT

ball-shaped end held in cuplike shell

BATHROOM

with shower stall or bathtub

BATTERY OF FIXTURES

2 or more similar, adjacent fixtures

BELL OR HUB

sufficiently enlarged to receive end of pipe

BENDING PIN OR IRON

straightening/bending lead pipe

BIBB

faucet, cock, tap, plug

BIDET

middle private part; “sitz bath”, foot bath

BLANK FLANGE

not drilled for bolt holes

BLIND FLANGE

closes end of pipe

BLOW-OFF

controlled outlet to discharge liquid/detritus

BOILER BLOW-OFF

valved outlet to discharge accumulated sediments

BRANCH

other than main, riser, stack

BRANCH INTERVAL

storey height; 2.43 meters

BRANCH, FIXTURE

water supply pipe (bet. fixture supply pipe and water-distributing pipe)

BRANCH, HORIZONTAL

drain pipe extending laterally w/ or w/o vertical sections

BRANCH VENT

horizontal vent

BRAZED JOINT

melts at temperatures higher than 449°C

B & S

Brown & Sharpe (specification); bell and spigot (ends of pipe)

BUILDING

structure built

BUILDING DRAIN

lowest horizontal piping; 0.6 m outside bldg. wall

BUILDING SEWER

starts from the end of the building drain

BUILDING SUBDRAIN

cannot drain by gravity

BUILDING SUPPLY

water service connection

CAULKING

plugging with oakum, lead

CAP

fitting; closing the pipe end

CATCH BASIN

receptacle to allow settleable material to deposit

CESSPOOL

non-watertight lined excavation; permitting liquid to seep (bottom and sides)

CHASE

vertical shaft (pipe stacks)

CHECK VALVE

automatically closes to prevent reverse direction

CIRCUIT VENT

connects to a vent stack; loop vent

CLARIFIER

interceptor; grease trap

COMMON VENT

unit vent; dual vent; (back to back arrangement of pipes)

COMBINATION WASTE & VENT SYSTEM

horizontal wet venting (sinks/floor drains)

COMBUSTIBLE CONSTRUCTION

ignite/burn at 756°C or less

CONFINED SPACE

vol. less than 1.4 cu.m. w/ 250 kg cal of aggregate input

rating (fuel-burning appliances)

CONTAMINATION

impairment of potable water (high hazard)

CONTINIOUS VENT

continuation of the drain to w/c vent connects

CONTINIOUS WASTE

drain connecting compartments

CONDUCTOR OR DOWNSPOUT

vertical pipe to convey rain water

CORPORATION COCK

stop valve connected to water service pipe to main

COURT

open, unoccupied space

CRITICAL LEVEL

min. elevation above flood level rim

CROSS-CONNECTION

bet. potable water supply and plumbing fixture

DEAD-END

extended portion of pipe closed at one end

DEVELOPED LENGTH

length of pipe at centerline and fittings

DIAMETER

nominal diameter as designated commercially

DOMESTIC SEWAGE

liquid/water-borne wastes (free from industrial wastes;

Sanitary Sewage

DOUBLE-BEND FITTING

shaped liked the letter „S‟

DOUBLE OFFSET

2 offsets in succession

DOWNSPOUT

vertical portion of rainwater conductor

DRAIN

pipe (ground/surface waters, storm water, wastewater in

bldg. drainage system)

DRAINAGE SYSTEM

pipings; convey sewage/liquid wastes

DRY VENT

does not carry liquid or water-borne wastes

DUAL VENT

common vent; unit vent

DURHAM SYSTEM

of threaded pipe, tubing, rigid constructionEFFECTIVE OPENING

cross-sectional area of water supply

FAUCET

valve located at end of water pipe

FERRULE

metallic sleeve; plug is screwed

FIXTURE

receptacle

FIXTURE BRANCH

supply pipe

FIXTURE DRAIN

from trap of fixture to junction of drain

FIXTURE SUPPLY

water supply pipe

FIXTURE UNIT

7 ½ gpm; 28.3 liters per minute (1 cu.ft/minute)

FLOOD LEVEL

water begins to overflow

FLOOD LEVEL RIM

top edge of a receptacle

FLOOR AREA

exclusive of vent shafts and courts

FLUSH TANK

flushing/removing excrements

FLUSH VALVE

using water directly from water supply pipes

FLUSHOMETER TANK

predetermined; air accumulator vessel

FLUSHOMETER VALVE

actuated by direct water pressure

GATE VALVE

at right angles; raised/lowered by threaded stem

GLOBE VALVE

fits against the valve seat (tortuous passage)

GOOSENECK

return bend; 30cm.-7.5cm; 3” (faucet); between service

pipe and main

GRADE

slope/fall; pitch

GREASE INTERCEPTOR

3 cu.m. capacity

GREASE TRAP (interceptor; clarifier)

retain grease from one to four fixtures

GROUND WATER

standing in or passing through

GROUP VENT

branch vent

HANGERS (Supports)

anchors, brackets, cradles

HEIGHT OF BUILDING

grade line to the highest point of coping

HIGH HAZARD (contamination)

HORIZONTAL BRANCH

HORIZONTAL PIPE

extending laterally; angle of not more than 45°

HOUSE DRAIN (Building Drain)

HOUSE SEWER (Building Sewer)

HOUSE STORM SEWER

to the public storm sewer

HUBLESS PIPE

CIP (plain ends) bolted steel bands, neoprene gasket

INDIRECT WASTE PIPE

indirectly connected with building drainage

INDIVIDUAL VENT (Back Vent Pipe; Revent Pipe)

INDUSTRIAL WASTE

free from fecal matter

I.P.S. (Iron Pipe Size)

INSANITARY

injurious to health

INTERCEPTOR (Clarifier)

INVERT

lowest portion of inside of pipe

LATERAL

secondary pipeline

LATRINE

water closet w/ trough

LAVATORY

wash basin

LEACHING CESSPOOL (not water tight)

LEADER (from gutter to downspout)

LENGTH OF PIPE

as measured along

LIQUID WASTE

discharge from fixture; no fecal matter

LOCAL VENT

convey foul air to outer air

LOOP OR CIRCUIT VENT

MAIN

principal artery

MAIN SEWER (Public Sewer)

common sewer

MAIN VENT (Vent Stack)

MANHOLE

access chamber

MASTER PLUMBER

Registered Master Plumber (RMP)

NAMPAP

Nat‟l Master Plumbers Association of the Phils.

OAKUM

hemp; hemp rope

OFFSET

combination of elbows & bends in piping line

PB (Polybutylene)

black; cross sectional area: oval

PE (Polyethylene)

black; cross sectional area: circular

PITCH (Grade)

PLUMBING

art & technique of installing

PLUMBING APPLIANCE

special class; device

PLUMBING APPURTENANCES

adjunct to basic piping system & fixtures

PLUMBING FIXTURES (fixture; receptacle)

PLUMBING OFFICIAL (Administrative Authority)

PLUMBING SYSTEM (water supply & drainage)

PLUMBING UNIT

min. standard quantity [ one (1) water meter, one (1) water closet, one (1) lavatory, one (1) shower head & drain for bathtub or shower stall, one (1) kitchen sink, one (1) laundry tray, three (3) floor drains, four (4) faucets/hose bibbs

POTABLE WATER (85% corrected)

PRESSURE

STATIC – w/o any flow motion

RESIDUAL - pressure drop (friction loss, head, meter)

PRIMARY BRANCH

base of a stack to its junction with main building drain

PRIVATE/PRIVATE USE

PRIVATE SEWAGE DISPOSAL SYSTEM

effluent discharging to subsurface disposal field

PRIVATE SEWER

privately owned; not controlled by public authority

PRIVY (Outhouse)

PRIVY VAULT (Pit)

PUBLIC/PUBLIC USE

PUBLIC SEWER

common sewer controlled by public authority

PVC (Polyvinyl Chloride)

potable (blue), gray, orange, brown

RECEPTOR

receive discharge from indirect waste pipe

REGULATING EQUIPMENT

valves & controls

RELIEF VENT

acts as auxiliary vent

RETURN BEND

2 - 90° bends; 180° bend in copper tubings

REVENT PIPE (Back Vent Pipe)

RIM (unobstructed top open edge of fixture)

RISER

vertical water pipe/extends one full storey

ROUGHING-IN (minus the fixtures)

SAND INTERCEPTOR (Interceptor)

SANITARY SEWAGE (Domestic Sewage)

SANITARY SEWER (Domestic Sewer)

no storm water; ground water

SEAL (trap seal; water seal)

vertical distance from crown weir to top dip

SECONDARY BRANCH

lateral

SEEPAGE PIT (Dry Well; Leaching Cesspool)

SEPTIC TANK

watertight receptacle

SERVICE PIPE (Water Service; Building Supply)

SEWAGE

liquid waste; storm/ground water; wastewater

SEWER

pipe/conduit

SEWERAGE, SEWERAGE WORKS

constructions for collection, transportation, pumping,

treatment, final disposition of sewage

SHAFT

vertical opening (elevators, dumbwaiter; air well)

SIAMESE CONNECTION

hose fitting; wye connection

SIPHONAGE

suction; less than atmospheric pressure

SHIELDED COUPLING

elastomeric sealing gasket

SLIP JOINT

(compression nut/washer; friction ring)

SLOPE (Grade)

SOIL STACK PIPE

vertical soil pipe

SOIL PIPE

discharge of WC, UR and the likes

SOLDERED JOINT

temp. below 427°C and above 149°C

SPIGOT

(synonymous with faucet)

SPECIAL WASTES

(use of indirect waste piping/receptors)

STACK (vertical line: soil, waste, vent)

STACK VENT (Main Soil & Waste Vent)

STANDPIPE

fire fighting vertical pipe

1. Wet Standpipe – water pressure maintained

2. Automatic Standpipe System – operates by opening a

hose valve

3. Manually-Operated Standpipe System – remote control device at each

hose station

4. Dry Standpipe – no permanent water inside pipe

STOREY

STORM WATER (Rain Water)

SUBSOIL DRAIN (Building Subdrain)

SUMP (Sewage Ejector)

emptied by mechanical means

SUPPORTS

hangers, anchors, brackets, cradles

SURFACE WATER

(river, lakes, seas, ocean)

SWIMMING POOL

water basin

TAILPIECE

cut pipe

TAPPED TEE

cast iron fitting with thread [Street Elbow)

TRAP

prevents backflow of foul air/methane gas

TRAP ARM

between trap and vent

TRAP SEAL (Seal, Water Seal)

TUBE

conduit/conductor (O.D.)

UNCONFINED SPACE

vol. equal to 1.4 cu.m

UNIT VENT (common vent; dual vent)

VACUUM (siphonage)

VACUUM BREAKER (Backflow Preventer)

VENT PIPE

for ensuring circulation of air

VENT STACK (Main Vent)

VENT SYSTEM

protect trap seals from siphonage/backpressure

VERTICAL PIPE

not more than 45° with vertical line

WASTE (Liquid Waste; Industrial waste)

WASTE PIPE

free from fecal matter

WATER TREATMENT

remove suspended solids by filtration

WATER DISTRIBUTING PIPE (Distributing Main)

WATER MAIN (Main Water Line; Main Water Supply, Main

Water Source, Street Main)

WATER SUPPLY SYSTEM

water service pipe, water supply line, water distributing

pipe, branch pipes, fittings, valves, appurtenances

WET VENT

vent pipe w/c liquid waste flows

WELDED JOINT/SEAM

joining of metal parts in plastic molten state

WYE

hose connection; two-gated outlets

YOKE VENT

for preventing pressure changes in the stacks

Taken from UST Architecture exams by Arch. Rafael Alli

Recommended review material for UST Preboard Exam

Prepared by: arkireviewph.multiply.com

Cast iron pipe Galvanized iron/steel pipe Plastic pipe Brass pipe Copper tube Lead pipe Asbestos cement pipe Glass pipe magnesium pipe Aluminum pipe

Polyethylene

Polybutylene

Polyvinylchloride

Chlorinated polyvinyl

Polypropylene

Acrilonitryle butadiene styrene

Welded pipe

Seamless pipe

Standard pipe

Single hub pipe

Double hub pipe

Hubless pipe

Change in direction Highest horizontal distance Inside the building near the connection

between the building drain and building sewer

Outside the building at the lower end of the building drain and extended to grade

Horizontal drain serving sinks and urinals Each run of piping more than 15m./50 ft.

(8 possible locations accdg to exam - haven’t found other answers)

Shower

Bathroom floor

Garage

Near water closet

Laundry area

Near urinal

Kitchen?

siphonage

back pressure

evaporation

capillary attraction

wind effects

Gate valve

Check valve

Globe valve

Angle valve

Butterfly valve

Foot Valve

Safety valve

P-trap

S-trap

3/4 s-trap

Grease trap

Bag trap

Crown trap

Bell trap

Unit vent

Circuit vent

Yoke vent

Loop vent

Relief vent

Back vent

Blind vent

Branch vent

A strong, rigid and economical plastic pipe. It resists a wide range of acids and bases but may be damaged by some solvents and chlorinated carbons.

A type of pipe manufactured from low expansion borosilicate having low alkali content; primarily used for the drainage of various corrosive liquids. It is very brittle and should be used when some measure of protection is provided against damage.

A valve that permits the flow of liquid in a pipe in one direction only and closes automatically to prevent backflow.

A fixture providing an opening in the floor to drain water into the plumbing system.

A pipe fitting with a removable plug which provides for inspection or cleaning of the pipe run; also called an access eye or cleaning eye.

A branch vent which serves two or more traps and extends from infront of the last fixture connection of a horizontal branch to the stack.

A pipe attached to drainage pipes near one or more traps which leads to outside air.

A fitting used to connect a branch pipe into a straight run of piping at 45 degrees.

A fitting or device so constructed as to prevent the passage of foul air, gases and some vermin without affecting the flow of sewage inside the pipe.

The vertical distance between the top dip and crown weir of a pipe.

A lined and covered excavation in the ground which receives the discharge of domestic sewage or other organic wastes from a drainage system.

A watertight receptacle which receives the discharge of a plumbing system or part thereof and is designed and constructed so as to separate solids from liquid, digest the organic matter through a period of detention and allow the effluent to discharge into a drainage system.

Also called an individual vent

A vent which terminates on the upper side of the fixture and does not connect to the main vent system. This is sometimes done with the intent of cheating.

A valve in which the flow of fluid is controlled by a rotating drilled ball that fits tightly against a resilient seat in the body.

A type of ventilation system used on fixtures in a room away from partitions.

The unobstructed vertical distance through the free atmosphere between the outlet of a waste pipe and the flood level rim of the fixture or receptacle into which it is draining.

A device or fitting which provides when properly vented, a liquid seal to prevent the emission of sewer gases without materially affecting the flow of sewage or waste water through it.

Any pipe or fitting which makes an angle of less than 45degrees with the horizontal.

A bathroom containing a water closet and a lavatory.

The installation of all parts of the plumbing system which can be completed prior to the installation of fixtures.

Refers to a plumbing fixture that rests on the floor.

A device which discharges a predetermined quantity of water to fixtures for flushing purposes.

A bathroom containing a water closet, a lavatory and a bathtub.

A faucet to which a hose may be attached.

A receptacle for wastes which are ultimately discharged into the sanitary drainage system.

A water supply pipe that extends one full storey or more to convey water to fixture branches or to a group of fixtures.

A vertical line of piping that extends one or more floors and receives the discharge of water closets, urinals and similar fixtures.

The pipe installed to ventilate a building drainage system and to prevent trap siphonage.

(siphonage also syphonage - 2 accepted spellings)

A vent which also serves as a drain.

The extension of a soil or waste stack above the highest horizontal drain connection to the stack.

The pipe from the water main or other source of water supply to the water distributing system of the building.

A vertical pipe installed in order to provide circulation of air to and from the drainage system.

A pipe that only conveys liquid waste, free from fecal matter.

A suction created by the flow of liquid in pipes.

A general term for any vertical line of soil, waste and vent pipe extending through one or more storeys.

The flow of water in pipes in a reverse direction from the which is normally intended.

Any group of two or more similar adjacent fixtures which discharge into a common horizontal waste or soil branch.

Any part of the piping system other than the main riser or stack.

A fitting with a removable plate or plug that is placed in plumbing drainage pipe lines in to afford access to the pipes for the purpose of cleaning their interior.

The length of pipe measured along the center line of the pipe and fittings.

The highest part of the inside portion of the bottom surface at the crown of a trap.�

The drain from the trap of a fixture to the junction of that drain with any other drain pipe.

A term sometimes used to describe a soil or waste pipe system which is constructed of threaded pipe, tubing or other rigid construction, using recessed drainage fittings.

The lowest portion of the inside surface of any horizontal pipe.

A waste pipe that does not connect directly with the drainage system but conveys liquid waste by discharging into a plumbing fixture or receptacle.

An artificial conduit, usually underground, for carrying off waste water and refuse.

Cased by bicarbonates, carbonates or hydroxide components

Bacteria in water

Caused by detergent

Coagulation, alum is added

Iron in water

Caused by calcium and magnesium deposits

Water softening

Water plus human waste from toilets and urinals

Waste water from laundry area, lavatory, sink, shower and bathtub.

Caused by iron and manganese

Mode of turbidity correction

Indirect water distribution system

Water supply requirement for single family

WSFU value for bathtub, public use

Minimum fixture supply size for lavatory

Toilet - water closet Individual vent - back vent Building sewer - Building drain - Clean-out - P-trap - Floor set - floor mounted Gate Valve - full way valve Hub - bell Lavatory - wash basin Vent stack - main vent Common vent - unit vent Soil or waste vent - Slop sink - service sink? Flocculation - coagulation