SCOPE OF WORK

The Item shall consist of furnishing all

materials, tools, equipment and fixtures
required as shown on the Plans for the
satisfactory performance of the entire
plumbing system including installation in
accordance with the latest edition of the
National Plumbing Code, and this
Specification.
14-1 MATERIAL REQUIREMENTS

All piping materials, fixtures and

appliances fitting accessories whether
specifically mentioned or not but
necessary to complete this Item shall be
furnished and installed.
A. Plastic Pipes
1. Unless otherwise specified or shown on drawings, all
tube pipes to be use in this project shall be plastic or
synthetic materials.
2. For rigid type of connections, the following shall be
used: Polyvinyl Chloride (PVC); Chlorinated Polyvinyl
Chloride (CPVC); Unplasticized Polyvinyl Chloride
(uPVC); Acrylonitrile Butadiene Styrene (ABS);
Polypropylene (PP) and Styrene Rubber Plastic (SR).
3. For flexible connections either of the following shall
be used, Polyethylene (PE) and Polybutylene (PB).
 PVC uPVC

CPVC
ABS

PP
PB
PE PB
4. The PE and PB tubes are in coil form available up to 150
meters long in coil form shall be used for underground water
connections.

5. Plastic pipe shall be of quality made by reputable

manufacturers free from defects, and shall be true, smooth
and cylindrical, their inner and outer surfaces being as
nearly concentric as practicable.

6. They shall be in all aspect, sound and perfectly molded free

from laps, pin holes or other imperfections and shall be
neatly dressed with its end finished reasonably square to
their axes.
7. Pipes and fittings for sanitary and potable water
lines as approved alternate shall be unplasticized
Polyvinyl Chloride Pipes and fittings (uPVC).
8. Pipes and fittings shall be made of virgin
materials conforming to Specification
requirements defined in ASTM D-2241 and PNS
65 1986.
9. Fittings shall be molded type and designed for
solvent cement joint connectionfor water lines
and rubber O-ring seal joint for sanitary lines.
B. Septic Tank
1. The septic tank shall be provided as shown on the Plans
including all pipe vents and fittings.
2. Various construction materials such as concrete masonry
work shall conform to the corresponding Items of this
Specification.
3. Inlet and outlet pipes shall conform to the latest edition of
the National Plumbing Code.
C. Plumbing Fixtures and Fittings

1. All fittings and trimmings for fixtures shall be chromium

plated and polished brass unless otherwise approved.
2. Exposed traps and supply pipes for fixtures shall be
connected to the roughing-in, piping system at the wall
unless otherwise indicated on the Plans.
3. Built in fixtures shall be watertight with provision of water
supply and drainage outlet, fittings and trap seal.
4. Unless otherwise specified, all plumbing fixtures shall be made of
vitreous china complete with fittings.
a) Water closet shall be vitreous china, free standing toilet combination,
round front bottom outlet siphon vortex or wash-down bowl with
extended rear self and closed coupled tank with cover complete with
fittings and mounting accessories.

b) Lavatory shall be vitreous china, wall hung with rear overflow and cast
in soap dishes, pocket hanger with integral china brackets, complete
with twin faucets, supply pipes, p-trap and mounting accessories.

c) Where indicated on the Plans, the counter top model make and color
shall be approved by the designing Architect.

d) Urinal shall be vitreous china , wall hung wash-out urinal with extended
shields and integral flush spreader, concealed wall hanger pockets, 19
mm. top spud complete with fitting and mounting accessories. Model
make and color shall be approved by the designing Architect.
D. Bathroom and Toilet Accessories
1. Shower head and fitting shall be movable, cone type with
escutcheon arm complete with stainless steel shower valve
and control lever. All exposed surface to be chromium finish.
2. Grab bars shall be made of tubular stainless steel pipe
provided with safety grip and mounting flange.

3. Floor drains shall be made of stainless steel beehive type,

measuring 10cm. x 10cm.and provided with detachable
stainless strainer, expanded metal lath type.
4. Toilet paper holder shall be vitreous china wall
mounted. Color shall reconcile with the adjacent
fixture and facing tiles.
5. Soap holder shall be vitreous china wall mounted.
Color shall reconcile with the adjacent tile works.
6. Faucets shall be made of stainless steel for interior
use.
7. Hose bibs shall be made of bronze cast finish.
E. Special Plumbing Fixtures

1. Kitchen sink shall be made of stainless steel self rimming, single

compartment complete with supply fittings, strainer traps, dual control
lever and other accessories.

2. Laboratory sink shall be made of cast iron metal with white porcelain
finish with single compartment, flat rim edge, 75 x 53 cm. complete with
supply fittings, strainer, trap and other accessories.

3. Scrub-up sink shall be made of cast iron white porcelain finish with 3
compartment X-ray processing tank, drain plug, open sanding drain 19
mm. inlet spud complete with stand and mounting accessories.
4. Built in appliances such as urinal, lavatory and slope sink
shall be installed as indicated on the Plans. Exposed surfaces
to be tile wainscoting complete with fitting accessories
required as practiced in this specialty trade.

5. Squat Bowl(s) shall be vitreous china, wash down with

integral foot treads, pail flush type. Color, make and type to
be approved by the designing Architect.

6. Grease Traps shall be made of cast bronze with detachable

cover and mounting accessories.
F. Roof Drains, Overflow Pipes and Steel Grating
1. The Contractor shall provide fit and or install
necessary drains with strainers where shown on the
Plans.
2. Each strain with strainer shall fit the size of the
corresponding downspout or roof leader over which it
is to be installed and in conformity with the following
schedule.
a) Scrupper drain (for balconies, parapet) shall be made of
bronze base with flashing. Flange threaded outlet and
convex with integral flashing clamp bolted to flange.
b) “Josam “ type drains shall be made of bronze base semi-dome with large
free area, flashing clamp and integral gravel stopper, for roof decks,
canopies, gutters and elsewhere indicated on the Plans.

c) Downspout when encased in concrete, unless otherwise shown on the

Plans shll be polyvinyl chloride (PVC), whether indicated or specified
requirement as herein described.

d) Overflow pipes shall be made of galvanized iron pipe measuring at least

13 mm. diameters and spaced at 20 cm. on center.

e) Steel grating shall be made of wrought iron metals of design on shop

drawings approved and surfaces to be coated with shop finish.
G. Fire Protection System

1. Fire hose cabinets shall be locally available consisting of 38

mm. diameter valve hose rack with 30 mm. nipple rubber
hose cable with square nozzle 38 mm. diameter brass,
chromium plated.

2. Fire standpipe system shall consists of risers and hose

valves. Standpipe shall be extra strong black iron.

3. Valves to be used shall be high grade cast bronze mounted

with standing 79.40 kg. working pressure.

4. Fire extinguisher shall be portable, suitable for Class A, B, C,

fires, mounted inside the cabinet. Cabinet shall be full flush
mounting door with aluminum trim for glass plate.
5. Frame and box shall be made of gauge 14 galvanized iron sheet
with white interior and red exterior baked enamel finish over the
well prepared primer.

6. Cabinet shall be wall mounted and size to accommodate the

defined components.

7. Yard hydrant where shown on the Plans shall match the Integrated
Fire Department requirements. Outlet shall be single 63 mm.
diameter gate valves with chain connected caps.

8. Built in appliances such as urinal, lavatory and slope sink shall be

installed as indicated on the Plans. Exposed surfaces to be tile
wainscoting complete with fitting accessories required as practiced
in this specialty trade.
 14-2 CONSTRUCTION
REQUIREMENTS
The Contractor before any installation work is
started shall carefully examine the Plans and
investigate actual structural and finishing work
condition affecting all his work. Where actual condition
necessitates a rearrangement of the approved pipe
layout, the Contractor shall prepare Plan(s) of the
proposed pipe layout for approval by the supervising
Architect or Engineer.
A. Installation of Soil, Waste, Drain and Vent Pipes

1. Soil Pipes – All soil and drainage pipes shall be sloped at 2% or 2

cm. per 1.0 meter run but in no case flatter than one (1%)
percent.

2. Horizontal lines shall be supported by well secured heavy strap

hangers.

3. Vertical lines shall be secured strongly by hooks to the building

frame and a suitable brackets or chairs shall be provided at the
floor from which they start.

4. All main Vertical Soil and Waste Stacks shall be extended full
size to and above the roof line to act as vents, except otherwise
indicated on the Plans.
5. Vent Pipes in roof spaces shall be run as close as possible to
underside of roof with horizontal piping slope down to stacks
without forming traps. Vertical vent pipes may be connected into
one main vent riser above the highest vented fixtures.

6. Where an end or circuit vent pipe from any fixtures is connected to

a vent line serving other fixtures, the connections shall be at least
120 cm. above the floor on which the fixtures are located.

7. Horizontal waste line receiving the discharge from two or more

fixtures shall be provided with end vents unless separate venting
of fixtures is noted on the Plan.

8. All changes in pipe sizes such as soil and waste lines shall be made
with reducing fittings or recessed reducers.
9. All changes in directions shall be made by appropriate use of
45˚ degrees Y; half Y; long sweep ; quarter bends or elbows
for soil and waste lines where the change in direction of flow
is from the horizontal to the vertical and discharges from
water closet.
10. Where it becomes necessary to use short radius fittings in
other locations, the approval of the supervising Architect or
Engineer shall be obtained prior to installation of said
fittings.
11. Cleanouts at the bottom of each soil stack, waste stack,
interior downspout, and where else indicated shall be the
same size as the pipe lines.
12. Vent pipes shall be flashed and made water tight at the roof with ferrule
lead sheet.
13. Trap – Each fixtures and place of equipment requiring
connection to the drainage system except fixtures and
continuous waste shall be equipped with a trap. Each trap
shall be placed as near to the fixtures as possible.
B. Water Pipes, Fittings and Connections
1. The water supply piping shall be extended to all fixtures,
outlets, and equipment from the gate valves installed in the
branch near the riser.
2. The cold water system shall be installed with a slope
towards a main shutoff valve and drain. Ends of pipe and
outlets shall be capped or plugged and left ready for future
connections.
3. All pipes shall be cut accurately to measurements and shall
be worked into place without springing or forcing.
4. All piping above the ground shall be run parallel with the
lines of the building unless otherwise indicated on the Plan.
5. All service pipes, valves, and fittings shall be kept at sufficient
distance from other work to permit finished covering not less than
12 mm. from such work or from finished covering on the different
service.

6. No water piping shall be buried in floors, unless specifically

indicated on the Plan. Changes in pipe directions shall be made
with reducing fittings.

7. Pipe drain indicated on the drawings shall consist of 12 mm globe

valve with renewable disc and installed at low points on the cold
water piping so that all piping shall slope 10 cm. in 30 meters.

8. All pipes to be threaded shall be reamed before threading. All

screw joints shall be made with graphite and oil or with an
approved graphite compound applied to make threads only.
C. Fire Standpipe System

Fire standpipe system shall consist of

risers and hose valve. Standpipe shall be
extra strong black iron. Valves shall be of
high grade cast bronze quality approved
by the Underwriter’s specifications.
D. Valve and Hose Bibs
Valves shall be provided on all supplied fixture as herein
specified.
1. The cold water connections to the domestic hot water heater
shall be provided with gate valves and the return circulation
connection shall have gate and check valve.
2. All connection to domestic hot water heaters shall be
equipped with unions between valve and tanks.
3. Valve shall not be installed with its stem below the horizontal
elevation. All valves shall be gate unless otherwise indicated
on the plans.
4. Valves up to 50 mm. diameter shall be threaded
ends, rough bodies and finished trimmings, except
those on chromium plated brass pipe.
5. Valves 63 mm. in diameter and larger shall have iron
bodies, brass mounted and shall have either screws
or flange ends.
6. Hose bibs shall be made of brass with 12 mm. inlet
threads hexagonal shoulders and 19 mm. male.
E. Fixtures, Equipment and Fastenings

1. All fixtures and equipment shall be supported and fastened

in a safe and satisfactory workmanship as practiced.

2. All fixtures required to be wall mounted on concrete or

concrete hollow block wall shall be fasten with brass
expansion bolts.

3. Expansion bolts shall be 6 mm. diameter with 20 mm.

threads into solid concrete, fitted with tubing or sleeves of
proper length to acquire extreme rigidity.

4. Inserts shall be rigidly secured, anchored and properly

concealed and flushed into the walls.

5. Bolts and nuts shall be horizontally mounted and exposed. It

shall be provided with washers and chromium plate finish.
F. Pipe Hangers, Inserts and Supports

1. Pipe hangers shall be wrought iron or malleable iron pipe spaced not
more than 1.50 meters apart for horizontal runs of pipe.

2. Chains, straps, perforated turn-buckles or other approved meand of

adjustment except the turn-buckles may be omitted for hangers on soil or
waste lines or individual toilet rooms to maintain stacks when spaced does
not permit.

3. Trapeze hangers may be used in lieu of separate hangers on pipe running

parallel to and closed to each other.

4. Inserts shall be cast steel of the type to receive machine bolt or nut after
installation. Insert permit adjustment of the bolts in one horizontal
direction and shall be installed before the pouring of concrete.

5. Wrought iron clamps or collars to support vertical runs of pipe shall be

spaced not more than 3.0 m. apart or as indicated on the Plan.
G. Plates and Flashing
1. Plates to cover exposed pipes passing through floor finished,
walls, or ceiling shall be fitted with chromium plated cast
brass plates or chromium plated cast iron or stell plates on
ferrous pipes.
2. Plates shall be large enough to cover and close the hole
around the area where pipes passes. It shall be properly
installed to ensure permanence.
3. Roof areas penetrated by vent pipes shall be rendered water
tight by lead sheet flashing and counter flashing. It shall
extend at least 15 cm. above the pipe and 30 cm. along the
roof.
H. Protection and Cleaning
1. During installation of fixtures and accessories and
until final acceptance, fixtures shall be protected with
strippable plastic or other approved means to
maintain fixtures in perfect conditions.
2. All exposed metal surfaces shall be polished clean
and free of grease, dirt or other foreign materials
after the completion.
3. Upon completion, thoroughly clean all fixtures and
accessories to leave the work in a polished condition.
i. Inspection, Warranty Test and Disinfection
1. All pipes, fittings, traps, fixtures, appurtenances
and equipment of the plumbing and drainage
system shall be inspected and approved by the
supervising Architect or Engineer to assure
compliance with all requirements of applicable
Codes and Regulations referred to in this
Specification.
J. Drainage System Test

1. The entire drainage and venting system shall have all the
necessary openings which can be plugged to permit the entire
system to be filled with water to the level of the highest stack vent
above the roof.

2. The system shall hold this water for a full of 30 minutes during
which time there shall be no drop greater than 10 mm.

3. Where only a portion of the system is to be tested, the test shall

be conducted in the same manner as described for the entire
system.

4. If and when the Architect or Engineer decides that an additional

test is needed, such as air to smoke test on the drainage system,
the Contractor shall perform such test without any additional cost.
K. Water Test on System

1. Upon completion of the rough-in and before connecting

fixtures, the entire cold water piping system shall be tested
at a hydrostatic pressure 1-1/2 times the expected working
pressure in the system during operation and remained tight
and leak proofed.

2. Where piping system is to be concealed, the piping system

shall be separately in manner similar to that described for
the entire system and in the presence of the Architect or
Engineer or his duly designated representative.
L. Defective Work
1. All defective work, materials replaced and tested
will be repeated until satisfactory performance is
attained.
2. Any material replaced for the satisfactory
performance of the system made shall be at the
expense of the Contractor.
3. Caulking of screwed joints or holes will not be
permitted.
M. Disinfection

1. The entire water distribution system shall be thoroughly flushed

and treated with Chlorine before it is operated for human use.

2. Disinfection materials shall be liquid Chlorine or Hypochlorite and

shall be introduced in a manner approved as practiced for water
distribution system.

3. After contact period of not less than 26 hours, the heavily

chlorinated water shall be flushed from the system with potable
water.

4. Valves for the water distribution system shall be opened and

closed several times during the 16 hours Chlorination treatment
period.
N. As-Built Drawings
1. Upon completion of the work, the Contractor
shall submit two sets of prints with all As-Built
changes shown on the drawings in a neat
workmanship manner.
2. Such prints shall show changes or actual
installation and conditions of the plumbing
system in comparison with the original drawings.