PLB Elements
PLB Elements
PLB Elements
Plumbing system
Includes potable water bldg supply and distribution pipes, all
plumbing fuxtures and trals, all drainage and vent pipes, and all
building drains and building sewers, including their respective
joints and connection, devices, receptors, and appurtenanxes
within the property lines of the premises and shall include
potable water piping, potable water treating or using equipment,
medical gas and medical vacuum systems, fuel gas piping, water
heaters and vents for same.
Corporation cock
A valve screwed into the street sewer main to supply the house
service connection
Goose neck
Part of pipe curve like yhe neck of a goose, usually flexible
Curb stop
A control valve for the water supply of a building, usually placed
in case of emergency or should the water supply of thr building
be discontinued
Water meter
A mechanical device to measure the volume of water passing
through a pipe
Meter stop
A valve placed at the street side of the water meter and serves as
a controlling device for the building installation
82C
Minimum temperature for sanitizing rinse
60C
Minimum temperature for general purpose cleaning and food
preparation
41C to 49C
Minimum temperature for showers
Basic
Piston pumps and centrifugal pumps are ____ types of pumps
Piston pumps
Basic type of pump used on small water distribution system for
elevating water in wells or other sources
Single action
Water is drawn in with only 1 motion (piston pump)
Double action
Water is drawn in either stroke (piston pump)
Centrifugal pumps
Reciprocating pumps
Type of piston pumps with a controlled speed wherein discharge
is pulsating and changes only when the speed of the pump is
changed.
Air chamber
Introduced in reciprocating pumps to regulate pulsation
Jet pumps
Centrifugal pumps used for drawing water up from a well
Miniature pumps
Type of jet pumps used for small applications
Rotary pumps
Piston pumps that make use of a pump driver thst can discharge
900-1200 gpm. They are also more efficient for viscous fluids
Submersible pumps
Pumps designed to be fully immersible within a tank or other
media storage receptacle
Turbine pumps
Centrifugal pumps used for large applications because of their
multiple impellers
2000 gpm
Turbine pumps can discharge up to
Gate valve
Aka full way valve
Gate valve
To completely close or completely open water line. Does not
control the flow of water
Gate valve
Best suited to the main supply and pump lines wherein operation
is infrequent
Globe valve
Controls the flow of water with a movable spindle. It can reduce
water pressure. Only one side of the valve is an inlet.
Check valve
Main function is to prevent reversal of flow (backflow) in the line
Check valve
Swing, lift, vertical, horizontal are type of _____ valve
Angle valve
Operates same w/ globe valve (disc and seat design). Used to
make 90 degree turn in a line. Reduces a number of joints
Foot valve
Located at the lower end of pumps used to prevent lose of
priminh of tye pipe
Foot valve
Aka retention valve
Safety valve
Used in water heating systems, heating systems, compressed air
lines Nd other pipe lines with excessive pressure
Compression cock
Type of faucets/bibbs that operates by the compression of a soft
packing upon a metal sheet
Key cock
Type of faucet/bibbs that operates with a round tapering plug
ground to fit a metal sheet
Ball faucet
Type of faucet/bibbs constructed with a ball connected to the
handle
Vent system
Receives flow of air to provide circulation of air to protect trap
seals fr siphonage or back pressure
Upper
Cleanout should be located at ______ end of every horizontal
waste or soil pipe
22.5 deg
Cleanout located at every change of horizontal direction of not
more than..
1.5m
Cleanout located within _____ inside the property line before
house sewer connection
15m
Cleanout located at every ____ to a horizontal run of a soil or
waste pipe
2% or 2cm/m
Slope of horizontal piping toward a point of disposal
3m
Support of horizontal piping every _____
Waste pipe
Coveys only wastewater or liquid waste free of fecal matter
Soil pipe
Conveys discharge of water closet, unrinal with or without
discharges from other fixtures to the building drain or building
sewer
Vent pipe
For ensuring the circulation of air in a plumbing system and for
relieving the negative pressure exerted on trap seals
Vent stack
Vertical vent pipe for providing circulation of air to and from any
part of the soil, waste of the drainage system
Stack
Vertical main of a system of soil; waste or vent piping extending
through one or more stories and extended through the roof
Branch
Any part of a piping sytem other than a main, riser, or stack
House/Building Drain
Lowest horizontal piping of a plumbing system that receives the
discharges from the soil, waste and other drainage pipes inside of
a building and conveys it to the house sewer outside of the
building
House/Building Sewer
Extends fr the house drain at a point 0.6m fr outside face of the
foundation wall of a bldg to the junction within the street sewer
Trap
Liquid seal which prevents backflow of foul air or methane gas
Septic tank
Watertight receptacle that receives discharge of drainage system
to retain solids and digest organic matter and allow liquids to
discharge into the soil outside of the tank througj open joint
piping or a seepage pit
Roof gutter
Collector at the eaves of the building
Down spout
Vertical pipe that conveys rain water; known as conductor or rain
water
Storm drain
Receives storm.water, clear rain, or surface water
Catch basin
Receptacle in which liquids are retained for a sufficient period of
time to allow materials to settle to deposit
Required trap
FU rating is based on size of
Common p-trap
Used for lavatories, kitchen sinks, laundry tubs, urinals;
materials nickel, chrome plated brass, galvanized malleable
copper, pvc
Stand trap
Used for slop sinks usually built low in the ground leaving very
little space for a foundation and a trap; serves as water seal and
structural support for the fixture
Running trap
Used within the line od the house drain
Drum trap
Large diameter (0.16m) used for fixtures that discharge large
amt of water (bathtubs, shower or floor drains)
True
True or false:
No fixtures shall be double trapped
S-trap
Prohibited. Predecessors of p-traps used before traps had to
connect to a ventilation line
The same
Size of trap shall be ____ as the trap arm to which it is
connected
51mm to 100mm
Size of trap seal of water for each fixture trap
Ventilation
To maintain balanced atmospheric pressure inside the system
Vent pipe
Pipe or opening used for ensuring the circulation of air for
relieving the negative pressure exerted on trap seals
Main vent
Principal artery of venting system to which vent branches are
connected; support to the main soil and waste vent
Main vent
Aka collecting vent line
Relief vent
Vertical line for additional air circulation bet drainage and vent
sys or as auxiliary vent for yoke vent
Looped vent
Used in spaces without partitions; vertical vent connection on a
horizontal soil or waste pipe branch at a pt downstream of the
last fixture turning to a horizontal line above the highest overlow
level of the highest fixture connected
Wet vent
Portion of vent pipe through which water flows
Local vent
Pipe or shaft to convey foul air from a plumbing fixture or a room
to the outer air
Dry vent
Vent that does not carry liquid or water-borne wastes
Side vent
Vent connecting to a drain pipe through a fitting <=45 deg to
vertical
Vent stack
Vertical vent pipe for providing circulation of air to and fr any
part kf drainage system
32mm / 0.5
Diameter of individual vent not less than ____ nor less than
_____ the diameter of the drain to which it is connected
152mm
Each vent shall rise vertically ____ above the highest level rim of
the fixtures served before offsetting horizontaly
1 pipe size
Vstr shall be increased _____ above the connection bet stack
vent and horizontal vent
2
No. Of fixtures having same level inlet openings, may be served
by a common vertical vent pipe connected to an approved double
branch fitting
150mm / 300mm
Vstr shall terminate vertically not less than _____ above the
roof nor less than ______ from any vertical surface nearby
3m
Vent opening fr any openable window
0.9m
Vent opening above any openable window
0.9m
Vent opening fr any lot line, alley, and street boundary lines
3m
Vertical vent pipes fr any part of the roof that is used for human
activities shall be _____ and shall extend not less than ______
above such roof
10
Each soil or waste stack extending ____ or more storeys above
the building drain shall be serves by a parallel vent stack
Smaller
Size of yoke vent shall not be _____ than either soil stack or
vent stack
1m
Yoke vent connection at the vent stack shall be placed ___ above
the floor level
Retardation of flow
Due to effect of atmospheric pressure and/or gravity
Deterioration of materials
Due to formation of acids
House traps
Placed in house drain inside foundation wall of the building
Drain tiles
Used to prevent groundwater fr seeping through the basement
walls and foundation; around perimeter of foundation connected
to house drain or sump pit
Sewage ejectors
Pumps the wastes up fr the sump pit to the sewers usually in
basement levels
Dug well
Or shallow well; most common; dug manually 15m deep
Bored well
Similar to dug constructed using auger driven by hand or w/
power tools; <15m; >40m w/ power tools
Jetted well
Use of extreme water pressure not to affect foundations; use
suction pumps
Jetted well
Aka sand point wells
Driven well
Use iron rod; 10-15m
Drilled well
For drilling oil; 1000m
Overhead tanks
No pressure but relies on gravity to supply water
Cisterns
Rc underground and connected with a pump.to supply water
0.375m
Dist of WC to side wall
0.75m
Dist bet WCs c-c
Reverse trap
Flushes through siphon action in trapway
Siphon jet
Larger trapway to prevent clogging and noise in flushing
Siphon vortex
Less noisy and very efficient flushing started by whirlpool
followed by complete flush
1 7/8"
Passageway in wash down
2 7/8"
Deep seal in wash down
8"x10"
Water area in wash down
2"
Passageway in reverse trap
3"
Deep seal in reverse trap
2 5/8"
Passageway in siphon jet
3"
Deep seal in siphon jet
2"
Passageway in siphon vortex
3"
Deep seal in siphon vortex
0.3m
Urinal center to side wall
0.6m
Urinal c-c spacing
0.375m
Bidet center to side wall
0.75m
Bidet c-c
2-4%
Receptor floor drain slope
559m
Width of door for thresholds
0.6sq.m
Minimum area for shower compartment
762mm
Shower heads should encompass diameter of
4.9m
Spacing of drains for gang shower rooms
1.78m
Vertical clearance of shower head to floor
25
Up to how many storeys for cast iron pipe?
600cm
Commercial length of cast iron pipe
50-150 mm
Sv type
Type of cast iron pipe generally used for bldg
Xv type
Type of cast iron pipe that is extra duty used for underground
installation
1.5m
Dist of horizontal support bet acid resistant cast iron pipes
Asbestos pipe
Made of asbestos fibers and portland cement; used as soil, waste,
ventilation pipe and downspouts; suited for concrete embedment
because of similar properties
750mm
Length if vitrified clay pipe
Lead pipe
Oldest pipe; highly resistant to acids; not recommended to
convey water for human consumption
Better than steel pipe for plumbing; more resistant to acid waste
Copper pipe
Oldest pipe like lead; smooth interior surface
K type
Class of copper pipe which is heaviest recommended for
underground installations
L type
Class of copper pipe which is lighter available in both rigid and
flexible form; for residential water supply line and radiant
heating installations
M type
Class of copper pipe which is thinnest; rigid; small water supply
lines and radiany heating installations
Brass pipe
Most expensive made of zinc (15%) and copper (85%); resistant
to acids; smooth interior
0.002
Prohibited lead content for joints in copper tubing solders and
fluxes
Compression coupling
Asbestos cement sewer pipes joined by
76mm to 102mm
Enlargement considered as obstruction in joinys
4ft
Dist of supports in cast iron pipes
Friction clamps
Support the weight of cast iron pipe at each floor level
Lag shields
Made of lead to attach pupe hangets or fixtures to concrete or
masonry
Caulking anchors
Provide a fastener permanently attached to the concrete or
masonry; internally threaded to accept machine screws and bolts
Toggle bolts
Used when attaching pipes to hollow masonry units; with springoperated wings
Plastic anchors
Can be installed in smaller holes
Cement
Most common material for septic tank
2
Minimum compartments od septic tank
0.6m to 1.8m
Liquid depth in septic tank
1/3 or 1cu.m
Capacity of secondary compartment in septic tank
6cu.m/1.5m
In septic tanks having _____ capacity, secondary compartment
should not be less than _____ in length.
1:10
Slope in digestion chamber of septic tank
2
Min no. Of manholes in septic tank
508mm
Min dimension of manhole in septic tank
3.7m
If first compartment in septic tank exceeds ______, an
additional manhole is reqd over the baffle
True
True or false
Inlet and outlet pipes should not be less than the sewer pipe
104.6mm
Diameter of vertical legs of inlet and outlet pipes shall not be less
the sewer pipe nor less that _____
101.6mm/304.8mm
Length and location of inlet and outlet in septic tank shall extend
____ above and ______ below water surface
50.8mm
Dist of inverts of outlet and inlet pipes
House sewer
Vent diameter is equal to cross sectional area of
228.6mm
Air space in septix tank
According to the Standards of Practice, the inspector is
required to _______ all the toilets.
Flush
False
A lavatory is __________.
a bathroom or washroom sink
Types of wells
Shallow and Deep Well
Used in the Air Pressure System. Often used with a pump. Also
makes use of a pressure relief valve, which relieves pressure
automatically if necessary .
PNEUMATIC WATER TANKS
For those wet stand pipe more than ____ from the fire service
connection, the minimum diameter is ____
15 meters - 63mm
of the bowl
- Has a bulge on the front
- Has a small amount of
standing water
- Cost less but is least
efficient and noisiest
Wash Down
any part of the piping system other than a main, riser or stack.
BRANCH
extends from the house drain at a point 0.60 meters from the
outside face of the foundation wall of a building to the junction
with the street sewer or to any point of discharge, and
conveying the drainage of one building site.
House/Building Sewer
Each fixture trap shall have a trap seal of water of not less
than_____and not more than ____ (except where a deeper
seal is found necessary by the Administrative Authority for
special conditions.
51 mm - 102 mm
The developed length of the trap arm (measured from the top
of closet ring to inner edge of vent ) of a water closet or
similar fixture shall not exceed ____
1.80 meters
Stack Vent
Direct effect of the Minus & Plus Pressure inside the system
due to inadequate ventilation of traps
Trap Seal Loss
olid organic matter that are denser than water and settle at the
bottom of the septic tank
SLUDGE
Most expensive
Made of an alloy or zinc (15%) and copper (85%)
Resistant to acids and has a smooth interior surface
Brass Pipe
CIRCUIT VENT
A branch vent that serves two or more traps and extends from in
front of the last fixture connection of a horizontal branch to the
vent stack.
COMMON VENT
A vent connecting at the junction of two fixture drains and
serving as a vent for both fixtures. A single vent that ventilates
multiple traps, in the case of back to back fixture.
CONTINOUS VENT
A vertical vent that is the continuation of the drain to which the
vents connect.
DRY VENT
A vent that does not serve as drain and is located where if is not
exposed to back up of waste from a drainage pipe.
GROUP VENT
A branch vents that performs its functions for two or more traps.
INDIVIDUAL VENT
A pipe installed to vent, a fixture trap and w/c connects with the
vent system above the fixture served or terminates in the open
air.
LOCAL VENT
MAIN VENT
The principal artery of the venting system to which vent
branches may be connected.
RELIEF VENT
A vent installed so as to permit additional circulation of air
between the drainage and vent systems where the drainage
systems might otherwise be air bound.
UNIT VENT
An arrangement of venting so installed that that one vent pipe
will serve two traps.
STACK VENT
The extension of a soil or waste stack above the highest
horizontal drain connected to the stack horizontal drain, the
uppermost end above the roof.
WET VENT
A vent which also serves as a drain.
YOKE VENT
A pipe connecting upward from a soil or waste stack to a vent
stack for the purpose of preventing pressure changes in the stack.
BACKFLOW
Is the flow of water or other liquids, mixtures or substances into
the distributing pipes of a supply of water from any source other
than its intended source.
BACK SIPHONAGE
Is the backflow of used, contaminated or polluted water from a
plumbing fixture due to negative pressure.
BATTERY OF FIXTURE
Refers to any group of two or more similar adjacent fixtures
which discharge into a common horizontal waste or soil branch.
BLANK FLANGE
A flange that is not drilled
BLIND FLANGE
A flange that closes the end of a pipe line used to discharge water
CAULKING
Is plugging an opening with oakum, lead or other materials
COUPLING
A short internally threaded section of pipe, used to join two pipes
of conduits
UNION
Used to connect the two ends of two pipes, neither of which can
be turned
NIPPLE
A short length of pipe with threads at each end; used to join
couplings or fittings
DEAD END
Is the extended portion of a pipe that is closed at one end to
which no connections are made on the extended portion.
DEVELOPED LENGTH
The length along the center of the pipe and fitting.
DRAINAGE SYSTEM
Includes all piping within public or private which conveys
sewage, rain water or often liquid waste to a legal point of
disposal but does not include the main of a public sewer system
or private or or public sewerage treatment.
FIXTURE BRANCH
Is a pipe connecting several fixtures
FLOOD LEVEL
Is a device located at the bottom of the tank for the purpose of
flushing water closets and and similar fixture.
FERRULE
A metallic sleeve, join to an opening of pipe, into which a plug is
screwed that can be removed for the purpose of cleaning.
INVERT
Is the lowest portion of the inside of any pipe or conduit that is
not vertical.
PLUMBING SYSTEM
Includes water supply and distribution pipe; plumbing fixture
and traps, soil waste and vent pipes; house drain and house
sewers including their respective connections.
ROUGH IN
Installation of all parts of the plumbing system which can be
completed prior to the installation of fixtures.
SIAMESE CONNECTIONS
A wye connections used on fire lines so that two lines of hose
maybe connected to the hydrant or to the same nozzle.
SOIL PIPE
Is any pipe which conveys the discharge of water closets of
fixture having similar function w/ or w/o the discharge of other
fixtures to the building drain.
TRAP SEAL
Is the maximum vertical depth of liquid that a trap will retain
measure between the crown weir and the top of the dip of the
trap.
WATER RESERVOIR
Install to be able to meet the water requirements during peak
demands from a low yielding water well.
50 FEET OR MORE
The location of water well to nearest septic vault.
2 PERCENT
Slope of house sewer connected from the building to the main
sewer.
CULVERT
BLACK WATER
The third kind of water after the storm water and area water.
RECESSED
The type of bathtub other than sunken, square, free standing.
WHITE
Color coding of high pressure steam.
BLACK
Color coding for fuel oil division.
2.50 M
Service drop conductor clearance over the roof.
COMPRESSION VALVE
A valve which in the water flow is shut off by a flat disk that is
screwed down onto its seat.
CISTERN
An underground tank reservoir to store water.
PRESSURE COCK
Tap used in high pressure water system with an interval valve to
control the flow of water.
UNION PATENT
FLUSHOMETER
A device that discharge a predetermined volume of water to
fixture for flushing purposes and is activated by direct water
pressure.
CORPORATION STOP
Another name for corporation cock.
AIR TRAP
A U-shaped pipe filled with water and located beneath the
plumbing fixtures to form a seal against the passages of gases
and odors.
ABSORPTION TRENCH
A trench containing course aggregate and a distribution tile pipe
through which septic tank effluent may flow covered with earth.
CATCH BASIN
An underground structure for drainage into which water from
the roof or floor will drain through sewer.
WYE FITTING
A type of fitting for yoke bent.
1 1/2"
Minimum discharge pipe and fitting for bath tub.
150mm DIAMETER
Minimum size of building sewer; it should not be less than the
building drain
1 1/2"
BATH FOOT
2"
BATH SHOWER STALL
1 1/2"
BATH SITZ
1 1/2"
BATH TUB
1 1/2"
BIDETS
1 1/2"
COMBINATION FIXTURE
1 1/4"
DRINKING FOUNTAIN
2"
FLOOR DRAIN
1 1/4"
FOUNTAIN CUPSIDERS
1 1/2"
LAUNDRY TRAYS
1 1/2"
SINKS (DISHWASHER)
2'
SINKS (HOTEL OR PUBLIC)
1 1/2"
SINK (KITCHEN OR RESIDENCE)
1 1/4"
SINKS (SMALL PANTRY OR BAR)
2"
SLOP SINKS (ORDINARY)
3"
SLOP SINKS (WITH COMBINE TRAP)
3"
URINAL (PEDESTAL)
1 1/2"
URINALS (LIP)
2"
URINALS (STALL)
2"
URINALS (THROUGH)
1 1/4"
WASH BASIN (LAVATORIES)
3"
WATER CLOSETS
SIPHON-VORTEX
Quiet, extermely sanitary. Like the siphon jet but having the
flushing water directed through the rim to create a vortex that
scours the bowl.
SIPHON-JET
Sanitary, efficient very quiet. A toilet bowl into which the
flushing water enters through the rim and siphonic action
initiated by a water jet draws the contents of the bowl through
the trapway.
REVERSE TRAP
Moderately noisy. Similar to siphon jet except that trap
passageway and water surface area are smaller.
WASH DOWN
Minimum cost. Least efficient subject to clogging, noisy. Simple
washout and emptying through small irregular passageway,
prohibited by some health codes.
BLOW OUT
Noisy but highly efficient. Strong jet into leg forces contents out
BIDET
A basin like fixture design to be struddled for bathing the
genitals and posterior parts of the body.
Types of Urinal
19.05mm or 3/4"
No building supply pipe shall be less than WHAT size in
diameter
46 mm
Minimum height of Fire Service Connection from the grade/floor
122mm
Maximum height of Fire Service Connection from the grade/floor
61 mm.
Minimum height of Dry Standpipe Outlet from the floor line
122 mm
Maximum height of Dry Standpipe Outlet from the floor line
5 FEET
Considered extension of bulding drain outside the building wall
150 mm
Fitting for base or soil stack and building drain
51mm or 2"
Wet standpipe for a riser not more than 15m
64mm or 2 1/2"
Wet standpipe for riser more than 15m
4"
Dry standpipe for a riser below 23m
6"
Dry standpipe for a riser more than 23m
RATIO OF 1:25
Ratio of water closets for female population for elementary and
secondary school.
RATIO OF 1:30
RATIO OF 1:75
Ratio of urinals for elementary schools.
RATIO OF 1:75
Ratio of water closets for female population for principal worship
places.
RATIO OF 1:5
Ratio of lavatory to number of occupants.
4 CLOSETS
Minimum number of water closet required for female office and
public buildings.
3 HEADS
Minimum head of water required in section of plumbing for
water test.
VENT PIPE
It ventilates a house drainage system and prevent siphonage and
back pressure.
6 FEET
The maximum horizontal developed length between the trap seal
and thevertical vent inlet at the trap.
COUPLING REDUCER
A female GI pipe reducer fitting used in straight connection, both
are threaded inside.
CIRCUIT VENT
A vent use in battery of plumbing fixture where the vent is
installed in front of the last fixture of the battery.
3/8"
It is the size of supply valve tank type for water closet.
JET
A water pump for a 200ft driven well to deliver 10gpm against
200ft. It is located at the surface.
RECIPROCATING
A pump motor installed on the surface attached to a lift and push
a rod to activate a submerge piston.
TURBINE
A pump with an impeller enclose in a housing coupled with the
pump motor. Its principle is to add a velocity to already flowing
liquid.
CENTRIFUGAL
A pump which delivers high water discharge with high water
pressure drawn from a shallow source like cistern, best suited as
fire or transfer pump.The motor is placed at the surface with
shaft to turn the impellers below.
46 mm
Minimum height of Fire Service station from the grade.
BELL REDUCER
A female GI pipe reducer fitting use to connect a reducing branch
from a main water distribution.
POLYETHELENE PIPE
PE
38 mm (1 1/2")
Standard size of wet standpipe outlet for each floor.
WYE FITTING
A type of pipe fitting for yoke vent.
6"
The minimum horizontal clearance of vent branch immediately
above the flood level rim of the fixture.
1 1/2"
The minimum size or trap of a bidet.
3/8"
Supply valve tank type for water closet.
COUPLING
A threaded fitting to join two threaded fittings as closed as
possible but not exceeding 3 inches.
BATTERY OF FIXTURE
Interconnection of the same fixture in one soil or waste branch
with one branch vent.
COMMON VENT
A single vent that ventiliates multiple traps, in the case of back to
back fixture.
NUMBER OF FIXTURE
A parameter in sizing the drainage pipe.
SOIL PIPE
Conveys a discharge of solid and liquid wastes closets with or
without the discharged from other fixture to the house drain.
102 mm (4")
Minimum size of standpipe for a building in which the highest
outlet is 23 m or less from the Fire service Connection.
PLUMBING SYSTEM
System of building which includes the water supply distribution
pipes the fixture and fixture traps, the soil waste and the vent
pipes, the house drain and the house sewer, the storm water
drainage with their devices.
64 mm (2 1/2")
Minimum size of wet standpipe for riser of more than 15 mts
from source.
6"
Minimum height of a branch vent above the fixture it is venting.
SIAMESE CONNECTIONS
Common term for a two way service connections.
BALL
Single level valve used in kichen sink, lavatory faucets or at
shower valve.
1/4", WYE and 1/8" BEND, LONG SWEEP, 1/8" and 1/8"
COMBINATION.
Fitting installed at the base of the soil stack and a building drain.
JACK
A suitable type of water pump for deep well 4" or 6' casing to
deliver 35gpm against 450 ft. total develop height.
ZEOLITE
Passing on it can treat hardwater.
AIR CHAMBER
Device used to prevent water hammering.
610 mm
Minimum height of dry standpipe outlet from the floor line.
64mm or 2 1/2"
Minimum size of wet standpipe for a riser more than 15 meters
from the source.
GATE VALVE
A cut off valve installed in the service piping system.
ASBESTOS PIPE
Least popular and not recommended use as potable water
distribution pipe.
THREE FIXTURES
120 LITERS
For cold water, a family members of 12 needs a 3.6 cu.mts. of
cold water. What is the maximum hot water probable hour
demand?
CHECK VALVE
A full open valve located in a supply pipe to every water heater.
5"
Which is not a standard size of GI pipe for water supply? 2 1/2",
3",4",5"
SUBMERSIBLE PUMP
A type of pump for driven well from 150 to 200 ft which work by
a principle of venturi where water of high pressure is pump into
the well to draw water upwards through the return pipe.
PRESSURE REGULATOR
A device used to control an incoming high water pressure into
the water distribution system by mechanical means so as to bring
it to a working pressure of 80 psi .
COUPLING
REVERSE OSMOSIS
Stage in water purification which removes mineral deposits,
slats, heavy metal, totally dissolves solids while some useful
minerals are retained.
ELBOW REDUCER
A female GI threaded pipe reducer fitting use to connect a
reducing branch pipe at an angle.