PART 1 GENERAL
A. The General Conditions apply to all work under this section of the Specifications.
1.02 SCOPE OF WORK :
A. Unless otherwise specified, the Contractor or his sub-contractor shall furnish all materials, tools, equipment, apparatus, appliances, accessories, transportation, labor and supervision required for the complete installation and testing of the Plumbing System ready for use in accordance with the best practice of the Plumbing Trade as listed herein but not limited to the following:
a. The Plumbing Contractor is required to refer to all architectural, structural, mechanical, fire protection, electrical and interior designs plus landscape plans and investigate all possible interference and conditions affecting his work.
b. All work shall comply with the pertinent provisions of the Plumbing Code of the concerned city, the Code on Sanitation of the Phil., and/or the National Plumbing Code of the Philippines.
c. Tapping from an existing public water main/or deep well of the site distribution to include supply & installation of main water meter.
Water supply and distribution system for the building and ground, including supply and installation of water tank and accessories and pump piping.
All building sanitary drains waste and venting systems including floor drains, and AHU drains.
f. Sewage collection and disposal system including sewer junction boxes, to septic tank and grease tank up to tapping point including accessories and piping inside septic tank and grease tank.
g. Building storm drainage system including deck and gutter drains, canopy drains, plant boxes drains, and building area drains.
h. Site drainage system including parking drains, trench drains, street inlets, drainage junction boxes, and drainage manholes up to the tapping point to the existing drainage system.
Supply and installation of all plumbing fixtures, fittings, trims and accessories.
Testing for leakage of all water supply and distribution system, drains, waste, sewer and venting system plus pressure testing and disinfections of the water supply and distribution system.
Testing for leakage and disinfections of water tanks.
Supply and installation, test run and start-up of equipment, booster pumping systems and other equipment under Plumbing Works.
Securing of all permits and licenses as required including water connection.
Excavation and backfilling in connection with the work shall be included.
Preparation and submittal of two (2) sets of as-built plans.
Furnishing of written, one (1) year warranty on the plumbing system.
1.03 WORK NOT INCLUDED
A. Construction of the R.C. Water Tank shall be by Civil Works.
B. Construction of grease tank shall be by Civil Works.
All electrical power wirings, except that furnished as an integral part of factory assembled equipment except as otherwise specified herein.
D. Painting except as required by the Plumbing Code and as specified herein.
E. Deep well drilling and construction to include deep-well pump and other related works should be by the Owner(s).
1.04 NOTES ON DRAWINGS:
The Drawings show the general arrangement all piping. However, where local and/or actual conditions at the jobsite necessitate a deviation or rearrangement; the Contractor shall prepare and submit the new arrangement for the Architect's approval.
B. Small scale Drawings do not possibly indicate all offsets, fittings and other parts of the system required. The Contractor shall arrange such work accordingly, furnishing such fittings, traps valves and accessories as may be required to meet such conditions.
1.05 APPLICABLE SPECIFICATION, CODES, ORDINANCES, PERMITS & FEES
A. The work covered in this contract is to be installed according to the specs, codes, ordinances and requirements of the following:
National Plumbing Code of the Philippines
National Building Code
NFPA 101 – Life Safety
4. The Code on Sanitation of the Philippines
5. Dept. of Environment & Natural Resources
6. Ordinances of concerned city or municipality
B. All construction permits and fees required for the work shall be obtained by and at the expense of the contractor. The contractor shall furnish the Owner final certificates of inspection after the completion of the work.
1.06 WORKMANSHIP & COORDINATION WITH TRADES:
A. All works shall be performed in first class and neat workmanship by mechanics skilled in their trades and such mechanics and their work shall be satisfactory to the Engineer.
The Plumbing Contractor is required to refer to the General Conditions and to all architectural, structural, electrical, mechanical and fire protection plans and specifications and shall investigate all possible interferences and conditions affecting his work.
PART 2 PRODUCT
A. Except as specified, the Contractor shall submit for the Engineer's approval, four (4) copies of a complete list of manufacturer's names of all equipment and materials he proposes to use, within thirty (30) days after award of contract.
B. The Contractor shall assume the cost of and the entire responsibility for any change in the work as shown on contract drawings, which may be occasioned by approval of materials other than, those specified.
2.02 PIPES AND FITTINGS SCHEDULE
Cold Water Lines – from water meter to water tank to pump piping shall be galvanized steel iron (G.I.) pipe, schedule 40, standard conforming to ASTM A-120-80, "APO" brand or approved equal. Fittings shall be malleable iron, class 250, use screwed connection from 15 mm. dia. to 65 mm. dia. and flanged connection from 75 mm. dia.& larger.
For distribution lines, risers and downfeeds and inside toilets shall be polypropylene pipes and fittings, jointing shall be by socket fusion or electro fusion. “Bugatti”, “Borplus”, “Vesbo” brand or approved equal.
For buried Galvanized iron (G.I) pipe, provide corrosion protection, coated with petroleum based paste and wrapped with petrolatum tape, “DENSO” brand or equal.
Hot Water Lines - shall be polypropylene pipes and fittings, jointing shall be by socket fusion or electro fusion. “Bugatti”, “Borplus”, “Vesbo” brand or approved equal.
Sewer and Waste Lines – shall be polyvinyl chloride (PVC) pipe, series 600, “MOLDEX SANIMOLD EXTRA, ORANGEBERGE” brand or approved equal. Fittings shall be solvent cement joint conforming to ASTM D2564
Vent Pipes - shall be polyvinyl chloride (PVC) pipe, series 600, “MOLDEX SANIMOLD EXTRA, ORANGEBERGE” brand or approved equal. Fittings shall be solvent cement joint conforming to ASTM D2564.
FCU/AHU Drain lines – for 50 mm. dia and above shall be polyvinyl chloride (PVC) pipe, series 600, “MOLDEX SANIMOLD EXTRA, ORANGEBERGE” brand or approved equal, for 40 mm. dia and below shall be PVC Blue, “MOLDEX, ORANGEBERGE”, brand or approved equal. Fittings shall be solvent cement joint conforming to ASTM D2564
Downspouts - shall be polyvinyl chloride (PVC) pipe, series 1000 II, “MOLDEX SANIMOLD EXTRA, ORANGEBERGE” brand or approved equal. Fittings shall be solvent cement joint conforming to ASTM D2564.
Storm Drainage Lines - shall be polyvinyl chloride (PVC) pipe, series 1000 II, “MOLDEX SANIMOLD EXTRA, ORANGEBERGE” brand or approved equal. Fittings shall be solvent cement joint conforming to ASTM D2564.
For outside building, concrete drain pipe (CDP), tonque & groove, mortar joints, reinforced for 300 mm. dia. & larger.
Gate valve - 75 mm. dia. & larger, shall be rising stem, iron body with bronze trim, flanged connection, min. of 150 psig working pressure. 65 mm. dia. & smaller, shall be rising stem, all bronze, female threaded, min. of 150 psig working connection, "Nibco”, “Honeywell”, “Bermad” or approved equal.
Check Valve - for booster pumps, 75 mm. dia. & larger shall be iron body with bronze trim, flanged connection, min. of 150 psig working pressure. 65 mm. dia. & smaller, same except female threaded connection. "Bermad" brand or approved equal.
C. Float Valve - shall be hydraulically operated, diaphragm actuated valve with the pilot control and float mechanism mounted on the cover of the main valve. The float positions the pilot control to close the valves when float contacts the upper stop and to open the valve when the float contacts the lower stop, "Bermad" brand or approved equal.
2.04 OTHER MATERIALS
A. Drains - "Unilex", “JPI (Jaman)” brand or approved equal.
1. Roof / Gutter
5. Area Drain
6. Floor cleanout
B. Water Meter - (size as indicated on the Plans) "ASAHI, ARAD" or approved by LWD for main meter,
C. Hose Bibbs - 20 mm. dia. standard hose connection, male tapered threads, polished chromium plated.
D. Outdoor Pipe Lines, Appurtenances :
E. Drainage Junction Boxes - 140 kg/sq. c. m. reinforced concrete with pre-cast reinforced concrete cover.
1. Thrust Blocks - 140 kg/sq. c. m. plain concrete
Sewer Junction Boxes - 140 kg/sq. c. m. reinforced concrete with C.I. grating cover.
3. Area-Drain/Catch Basin - 140 kg/sq. reinforced concrete with C.I. grating cover.
Cistern - 210 kg/sq. c.m. reinforced concrete.
A. Flanged Joint Gasket - GARLOCK or equal.
B. Screwed Joints - U.S. Federal Specifications GG-P-251.
PVC Pipes and Fittings - PVC cement or as per the Manufacturer's recommendations.
Polyethylene/Polypropylene pipes and brass fittings or by fusion welding.
E. Hubless Cast Iron Soil Pipes - sleeve type coupling & gasket for hubless pipes, conforming to ASTM Standard C-26.
F. Centrifugal Gray cast Iron – Bell and Spigot, gasketed sliptite joint
Dissimilar Pipes – Adaptor fittings shall be used.
Concrete Drain Pipe – Cement mortar
Copper Tubing - Soldering
PART 3 IDENTIFICATION & APPROVAL OF MATERIALS :
A. Each length of pipe, fittings, traps, fixtures, and device used in the Plumbing System shall have cast, tamped or marked on it, the manufacturer's trade mark or name, weight, type and classes of product when so required by the Standard.
B. Within thirty (30) days after award of the Contract, the Contractor shall submit for the Architect's approval, the names of suppliers and materials proposed including trade names and/or samples of the materials if deemed necessary.
C. Brand names mentioned in this Specification are only for the purposes of indicating the desired quality and design.
PART 4 SUBSTITUTION & TESTING OF MATERIALS :
A. Intended materials substituted from those originally specified shall be accepted only after a formal request for substitution, accompanied by:
1. Reasons for substitutions;
2. Certificate of test indicating quality, compared to those originally specified.
3. Cost comparisons with material originally specified. Requests shall be submitted to the Architect for evaluation at least 15 working days before installation of subject material is due, or at least 7 days before opening of bids.
B. Cost of testing of materials, whether on originally specified items or on substitution, shall be to the account of the Contractor.
C. Results of tests shall be submitted to the Architect for evaluation at least 15 days before the material is due for installation on the job.
PART 5 SOIL, WASTE, DRAIN AND VENT PIPES :
A. Soil, waste and vent pipes and fittings shall be as stated under Part 2 of this Specification.
B. All sewer and drainage pipes shall be pitched 6 mm. per 300 mm. but in no case flatter than 3 mm. per 300 mm.
A. Horizontal lines shall be supported by well secured length heavy-duty straphangers or floor chairs as required. Hooks to the building frame shall secure vertical lines strongly and a suitable bracket or chairs shall be provided at the floors from which they start.
B. Cast iron soil pipes in trenches under the ground shall be laid true the line and grade on a stable and suitably prepared foundation, each section of the pipe being properly bedded.
C. In soft ground liable to settlement, a gravel base 300 mm. deep and twice the width of the pipe shall be rolled or tamped. Backfilling shall be carefully placed and tamped for the purpose, in such a manner that the pipe lines or connections are not disturbed.
Every plumbing fixture shall be separately trapped by a vented water sealed trap as close to the fixture outlets as the conditions allow, but in no case at a distance greater than 600 mm. In case of the upper or the only fixture on a soil pipe extended full size through the roof, a vent shall not be required when said fixture has its center stack. Traps shall be of the same diameter as the waste pipes from the fixtures that they shall serve, all traps shall have a water seal of at least 32 mm. with a brass thumbscrew cleanout at the bottom of the seal.
A. Vent shall be taken from the crown of the fixtures, except for water closet traps, in which case, the branch line shall be vented below and trap and above all small waste inlets, so connected as to prevent obstructions. Each vent pipe shall be run separately above the fixtures into the adjacent soil pipes, a distance not more than 1.50 meters. If more than this distance, the vent shall run independently through the roof.
B. A vent line shall be wherever practicable, direct extension of a soil or waste line.
C. Main vent risers at 4.5 meters along or more shall be connected at the foot with the main waste or soil pipes below the lowest vent outlet with a forty-five degree (45) connection.
D. All vertical soil or vent pipes shall be carried up at least 600 mm above the roof of the building and the open side ends are to be entirely and securely covered with ga.16 mesh copper cloth.
E. Vent pipes in roof spaces shall be run as close as possible to the underside of roof with horizontal piping pitched down to stacks without forming traps. Where an end or circuit vent pipes from fixtures it shall be connected into the main vent or vent stack.
5.05 ROUGHING - IN
Roughing - in for pipes and fixtures shall be carried along with the building construction. Correctly located openings of proper sizes shall be provided where required in the walls and floors for the passage of pipes all items to be embedded in concrete shall be thoroughly clean and free from all rust, scale and paint.
All changes in pipes sizes on soil, waste and drain lines shall be made with reducing fittings or reducers. All changes in direction shall be made by the appropriated use of forty-five degrees (45) wyes, or long sweep bends, except that sanitary toes may be used on vertical stacks. Short quarter bends or elbows may be used in soil and waste lines where the change in direction is from the horizontal to the vertical and on the discharge from the water closet.
5.07 JOINTS AND CONNECTIONS
A. All joints shall be air and watertight. For joining pipes, the following shall be used:
Cast iron soil and waste pipes & fittings, hubless sleeve type joints.
2. Centrifugal gray cast iron – Bell and spigot, gasketed sliptite joint
3. Galvanized wrought iron or steel piped; screwed or threaded joint; use scalant.
4. Lead to cast iron pipes; Adaptor fittings, screwed and hubless coupling gasket joints.
5. Concrete pipes; bell and spigot or tongue and groove.
6. Polyvinyl chloride (PVC) pipes, socket type with PVC cement.
7. Polyethylene/Polypropylene pipes, brass fittings and electro fusion or socket fusion joints.
PART 6 WATER DISTRIBUTION SYSTEM
A. Water meters shall be furnished by the Contractor and installed with the proper and complete piping arrangements for the system.
B. The exact dimensions for setting the meter shall be as per requirements of the LWD.
A. The piping shall be extended to all fixtures, outlets and equipment from the gate valves installed in the branch near the riser.
B. Unions shall be provided where required for disconnection.
C. All pipes shall be cut accurately to measurements and shall be worked into place without springing or facing. Care shall be taken so as not to weaken the structural portions of the building.
D. All service pipes valves and fittings shall be kept at sufficient distance from work to permit finished covering not less than 15 mm from such work or from finished covering on the different service.
E. Changes in pipes shall be made with reducing fittings.
F. Accessible Contraction - Expansion joints shall be made wherein necessary. Horizontal runs of pipe over 15 m. in length shall be anchored to wall or the supporting structure about midway on the run to force expansion and contraction equally towards the ends.
PART 7 EXCAVATING, PIPE LAYING AND BACKFILLING :
Trenches for all underground pipelines shall be excavated to the required depths and grades. Bell holes shall be provided so that pipe will rest on well-tamped solid ground for its entire length. Where rock is encountered, excavation shall extend to a depth 150 mm below the pipe bottom and other approved filling materials.
7.02 CONCRETE PROTECTION
All pipes except concrete pipes and cast iron soil pipes that will run underground shall be protected with Class B concrete casing, a minimum or 100 mm around the pipe perimeter and 250 mm below the finish grade.
Materials for backfilling shall be free of debris or big rocks. Backfill shall be placed in horizontal layers, properly moistened and compacted to an optimum density that will prevent excessive settlement and shrinkage.
PART 8 MISCELLANEOUS
Cleanout shall be of the same size as the pipe, the location of which is extended to an easily accessible place.
A. Every plumbing fixture of equipment requiring connections to the drainage system shall be equipped with a trap.
B. Each trap shall be placed as near as possible to the fixture. No fixture shall be double trapped.
8.03 VALVES AND HOSE BIBBS
A. Valves shall be provided on all water supplies to fixtures as specified.
B. Hose bibbs shall be made of brass with 15 mm. dia. make male inlet threads hexagon shoulders and 20 mm. dia. connections.
8.04 PIPE HANGERS INSERTS AND SUPPORTS
A. Horizontal runs of pipe shall be hung with adjustable wrought iron or malleable iron pipe hangers spaced not over 3 m. apart, except hub and spigot soil pipes which shall have hangers spaced not over 1.52 m. apart and located near the hub.
B. Hangers shall have short turnbuckles or other approved means of adjustment.
C. Inserts shall be of cast steel and shall be of type to receive a machine bolt or nut after installation.
D. Wrought iron clamps shall be use to support vertical pipe runs or collars spaced not more than 9 m. apart.
E. Water and Vent Pipes - 65 mm. dia. and larger; band type 6.1 mm x 25 mm flat mild steel or black iron with 15 mm. dia. round rod with plates and nuts; 50 mm. dia. and smaller split ring type with 10 mm. dia. iron rods with inserts plates; toggle bolts, clamps or expansion shield.
8.05 PIPE SLEEVES
A. Pipe sleeves shall be installed and properly secured in place at all points where pipes pass through masonry or concrete.
B. Pipe sleeves shall be of sufficient diameter to provide approximately 6.1 mm clearance around the pipe of insulation.
C. Pipe sleeves in walls and partitions shall be of cast iron, wrought iron or steel pipe. Pipe sleeves in concrete beams or concrete slabs shall be wrought iron or steel pipe. Pipe sleeves in concrete beams or concrete slabs shall be wrought iron or steel pipe.
D. Pipe sleeves on footings shall be cast iron or steel and shall be not less than 100 mm. dia. larger in diameter than the pipe to be installed.
E. Where pipes pass through waterproofing membrane, the sleeves shall be provided with an integral flange or clamping device to which a flashing shield can be soldered.
F. The space between the pipes and sleeves shall be made watertight by inserting a picked oakum gasket and filling the remaining space with poured lead caulking thoroughly.
PART 98 HOT WATER DISTRIBUTION
A. All pipes and fittings for hot water supply shall be copper pipes and fittings. Exposed pipes shall be provided with insulation.
B. Pipe covering or insulation shall be of standard thickness Magnesia or mineral wool glass fiber. All insulation shall be held in place with at least 20 mm wide brass strips at a spacing of at least 150 mm on center.
A The hot water piping system shall be pitched toward fixtures and risers for proper air relief. Provide drain cocks at low points for drainage system. Pitch line 25 mm x 7.6 m.
B. Horizontal runs of pipe 15 m. in length shall be anchored to the supporting structure midway on the run to give allowances for equal expansion and contraction of pipes.
C. Unions shall be provided where required for disconnection. Threaded swing joints shall be used for all branch connections to risers and mains.
PART 10 FIXTURES, FITTINGS, AND ACCESSORIES
10.01 Verify architects specification
PART 11 PUMPS
A. All requirements shall be supplied from reputable firms engaged in the manufacture of each particular item. The entire assembly as installed shall be given a start-up and test run to prove that all the specifications have been met before acceptance by the Owner. The test duration shall be 24 hours. Submittal of the Certificate of Test to the Owner's shall be a condition of final payment.
B. The Specification herein stated are basic guide only. Other items not so indicated but which are obviously necessary for the proper operation of system as intended shall be supplied in accordance with accepted engineering standards.
C. The equipment shall be guaranteed for a period of at least one (1) year of trouble free operation. The supplier of equipment shall certify to the availability of spare parts locally and service in case of system breakdowns within a period of at least three (3) years. Manuals of operation and maintenance and lists of spare parts shall be supplied together with the equipment. Submittal of Warranty Certificate shall be on condition to the final payment.
D. The supplier shall submit at least two (2) copies of pumps performance curves showing among others, the pump rating and pump efficiency, properly marked thereon.
E. Accessories to be supplied for each group shall include one non-slam type check valve, and two (2) gate valves, of size equal to the size of pump discharge and suction and rated 150 psi. Also, one pressure gauge for each set of pumps and pipe fittings necessary for complete installation shall be provided. The pressure gauge shall be 100 mm. face diameter and shall be reading from 0 psi (or kg/cm) to 100 psi (or 7kg/cm).
F. Price quoted shall include cost delivery of all quoted items to the jobsite. Pump and motor installation dimension drawings shall be submitted together with the quotation.
G. The brands, names, and place of manufacture of pump, motor, valves, controls and all accessories where applicable shall be indicated in the quotation. Also, a description of pump impellers being offered shall be included.
H. A metal nameplate indicating in indelible letters the correct specifications of the pump and motor shall be properly attached to the assembly at a location such that the information written thereon can be conveniently read by all concerned.
I. A separate price shall be quoted for installation work and preparation submittal of as installed drawings.
11.02 BOOSTER PUMPS:
1. Number of Units: Two (2) units identical
2. Capacity / Unit: 50 GPM vs 150 FT TDH approx. 5 HP each
3. Type: Horizontal centrifugal, end-suction, close coupled to electric motor on a common base, with priming valve, suitable for pumping domestic water by negative suction with pressure relief valves
4. Electric Motor Drive: 220/440 V, 3-Phase, 60 cycles, open drip proof, 5 Hp.
Motor Controls: Reduced voltage, wye delta, magnetic starter, H-O-A switches, overload relays, extra quick trip overload current relay, phase failure relay, ground fault relay (liquid sensor type) and alternators.
Accessories: Vibration insulating hose connections at suction and discharge lines, electrode type water level control or equal to prevent pumps from running dry.
11.03 HYDROPNEUMATIC PRESSURE TANK (DIAPHRAGM OR BLADDER TYPE):
1. Number of Units: One (1) unit
2. Type: Cylindrical tank; vertical mounted, diaphragm type.
3. Capacity: 250 US gals.
4. Operating Pressure: Cut-in-45 psi and cut-off at 65 psi
5. Tank Material: Mild steel 3/16" minimum thickness, 100-psi pressure rating per ASME Code for Unfired Pressure Vessels. Bladder shall be FDA approved.
a. Pressure gauge for operating pressure of 0 to 100 psi, dial face diameter-100 mm.
b. Water level gauge, consisting of a sight glass in copper tubing with sufficient opening and graduations to indicate the level of water inside pressure tank correct to one (1) mm.
c. Pressure Relief Valve: To release pressure at 70 psi.
d. Water Drain Valves.
e. Pressure switches, to be set at cut-in 45 psi; and cut-off-65 psi.
PART 12 WATER RESERVOIR
12.01 UNDERGROUND WATER TANK - Reinforced concrete
12.02 PIPING, FITTINGS AND MISCELLANEOUS METAL WORKS
A. Furnish and install all pipe fittings, valves, specials, pipe supports, miscellaneous metal work and all required appurtenances as shown on the plans and as required to make the entire piping system operable.
B. All materials furnished and installed shall be new and guaranteed free from defect in design, materials and workmanship.
C. Adequate protective measures shall be provided to project pipes, fittings, valves and all other materials from damage or injury during storage and installation.
12.03 FLANGES, GASKETS, AND BOLTS:
A. Flanges shall conform in dimensions and drilling to ASA B-16.1 Class 125.
B. Gaskets shall be ring-type JOHN MANSVILLE or cranite.
C. Bolts shall be standard square head machine bolts with heavy, hot, pressed hexagon nuts. Threads shall conform to ASA B-1.1, coarse thread series, Class 2 fit.
12.04 MANHOLE FRAME AND COVER :
A. All castings for manhole frames shall be tough, gray iron free from warps, cracks, holes, swells and cold shuts, and approximately 3 mm thick.
B. All casting shall conform to the requirements of ASTM Standard A-48 for gray from castings.
C. Model shall be "Unilex", or approved equal.
12.05 LADDER RUNGS:
Ladder Rungs shall be of 20 mm. diameter round stainless steel bar attached to the walls as shown from castings.
A. All pipes shall be carefully placed and supported at the proper lines and grade where possible shall be sloped to permit complete draining.
B. Piping runs shown on Drawings shall be followed as closely as possible, except for minor adjustments to avoid adverse-effect on architectural and / or structural features. If major relocations are required, they shall be subjected to the approval of the Architect.
C. Carefully inspect all pipe and fittings before installation. Inspection of pipe shall include light tapping with a hammer to detect cracks of defects. No pipe fittings or valve which is cracked or shown defects shall be used.
D. Suitable anchors, brackets, or hangers shall be provided to all piping. Vertical pipes shall be anchored by suitable galvanized steel straps. Pipe supports shall be provided as shown on the plans and whenever else necessary to prevent stain on joints or to facilitate taking down pipe.
E. Piping through the Walls - Where the pipe pass through walls, care shall be exercised to insure this joint are watertight.
12.07 TESTS FOR WATER:
Tightness of Completed Tank - The completed reinforced concrete ground tank and elevated tank shall be tested for water-tightness by filling it up with clean water after cleaning out all dirt and debris inside the tank. The water shall be allowed to stand for a minimum period of 24 hours reckoned from the time the free-board line was reached during filling up. After the 24 hour period there shall be no drop in water level in the tank more than 40 mm, otherwise, the leaks shall be located and plugged properly and the test for water-tightness be repeated
12.08 DEFECTIVE WORK:
A. If the inspection and test show any defect such defective work or material shall be replaced and the test shall be repeated until such satisfactory to the Owner.
B. All repairs shall be made with new material at the expense of the Contractor.
C. No caulking of screwed joints or holes will be accepted.
PART 13 GREASE INTERCEPTORS:
A. Grease Interceptor (tenant supplied) - Furnish and install where indicated on the drawing grease interceptors (traps) with a flow rate of 25 gpm. (min.) to serve a kitchen sink.
B. Overall efficiency of the interceptor shall not be less than 90% when operating at the specified rate of flow.
C. Furnish and install central grease tank as required on plans. Verify drawings.
PART 14 OIL INTERCEPTORS:
A Furnish and install where indicated on the Drawing an oil intercepting system, complete with oil interceptor, venting system, intake and discharge piping, test and suction line, oil storage tank and all fittings and accessories necessary for complete oil intercepting system, ready for use.
B. The oil interceptor shall be cast iron construction with a flow rate capacity of 20 gpm. (min.). Inlet and outlet size shall be both 50 mm. (min.).
PART 15 WATER METERS
Furnish and install where indicated on the Drawings water meter and sub-water meters with sizes as shown on drawings, shall be "ARAD", “ASAHI” or LWD approved equal.
PART 16 SITE PLUMBING UTILITIES:
A. The entire site plumbing utilities system shall be laid out and installed consistent throughout with the given slopes in the plans. Pipe joints and connections to area drains, catch basin, and junction boxes shall possess such leak-proof and seepage proof integrity achievable with the works called for under this particular section of the Specifications.
B. Junction Boxes for storm & sanitary (sewer) drainage lines outside the building shall be cast-in place reinforced concrete sections and pre-cast concrete over.
C. Trench excavation and backfilling shall be as specified in excavation, trenching and backfilling for utility system.
D. Concrete Drainage Pipe:
1. Material, Pipe shall be reinforced concrete pipe (300 mm dia. & larger) and non-reinforced concrete pipe 250 mm dia. & smaller conforming to ASTM C14-75.
a. Bedding surfaces shall provide a firm foundation, carefully shaped true to line and
b. Concrete pipe shall be laid carefully with hubs upgrade and ends fully and closely joints. Joints shall be cement mortar. Cement mortar shall consist of one part Portland Cement and 1 1/2 parts clean sharp sand with only enough water for work-ability. A gasket of closely twisted hemp or Oakum shall be placed around the pipe. The gasket shall be in one (1) piece of suitable diameter (not less than 19 mm) and shall be lapped at the top. The gasket shall be saturated with that cement before being placed and rammed. The joint shall be completely filled with cement mortar and rammed thoroughly with wooden calking tool. The joint shall then be overfilled and finished to a smooth level outside.
16.02 EXCAVATION FOR STORM & SANITARY (SEWER DRAINAGE SYSTEM)
A. General. The Contractor shall do all excavation of whatever substances encountered below depth shown on drawings. Excavated materials not required for fill or backfill shall be removed from site as directed by the Engineer and disposed of by the Contractor. Excavation for accessories to have 300 mm minimum and 60 mm maximum clearance in all side. Excavation shall not carried below the required depth. Excess excavation below required level shall be backfilled at the Contractor's expense with earth, sand, gravel or concrete, as directed by Engineer, and thoroughly tamped unstable soil shall be removed and replaced with gravel or crushed stone, which shall be thoroughly tamped.
The Engineer shall determine the depth of removal of unstable soil. Ground adjacent to all excavation shall be graded to prevent water running. The Contractor shall remove by pumping or other means approved by the Engineer any water accumulated in excavation and keep trench from water until the bedding is complete.
B. Trench Excavation. Banks of trenches shall be vertical. Soft materials shall be reported to the Engineer. In rock, excavation shall be carried 200 mm below bottom of pipe. Loose earth or gravel shall be used for backfill, and tamped thoroughly and rounded to received pipe as above.
C. Rock Excavation. Rock excavation shall include removal of boulders larger than 1/2 m 3 in volume and ledge rock concrete or masonry structures that required drilling in volume and ledge rock concrete.
D. Bracing and Shoring. The Contractor shall do all bracing sheathing and shoring necessary to perform and protect all excavation as indicated on the plans, as required for safety, as directed by the Architect, or to conform to governing laws.
Test: Test for workmanship on utility lines shall be conducted in accordance with the applicable utility specification before backfilling.
A. Backfilling: After pipes have been tested and approved, backfilling shall be done with approved material free for large clods or stones.
1. Trenches. Backfilling material shall be placed evenly and carefully around and over pipe in 150 mm maximum layers. Each layer shall be thoroughly and carefully rammed until 300 mm of cover exists over pipe. The remainder of backfill material shall be placed, moistened and compacted. Water settling will not be permitted in clay soils. It may be required at the option of the Engineer in sandy soils.
2. Trench under areas to be paved. Material shall be placed in 200 mm maximum layers after filling 300 mm above pipe as previously described. Each layer shall be compacted to density equal to that of adjacent original material so that pavement can be placed immediately.
3. Structures: All forms, trash, and debris shall be removed and cleared away. Approved backfill material may come from excavation or borrow. It shall be free from rock, lumber or debris. Backfill material shall be placed symmetrically on all side in eight (8) inch maximum layers. Each layer shall be moistened and compacted with mechanicals or hand tampers. In area to be paved, each layer shall be compacted to density equal to that of adjacent materials so that pavement can be placed immediately.
B. Maintenance. The Contractor shall refill for settlement all backfilled areas.
C. Clean-up. The Contractor shall clean up and dispose of all excess materials, trash, wood forms and other debris.
PART 17 TEST AND DISINFECTION :
17.01 DRAINAGE SYSTEM TEST
A. The entire drainage and venting system shall have all necessary openings which can be plugged to permit the entire system to be filled with water to the level of the highest stack vent / or vent stack above the roof.
B. The system shall hold this water for a full thirty (30) minutes during which time there shall be no drop more than 100 mm.
C. Each section of pipeline shall be slowly filled water and the specified test pressure, measured at the point of lowest elevation shall be applied by means of a pump connected to the pipe in a manner satisfactory to the Architect. During the filling of the pipe in and before applying the test pressure, all air shall be expelled from the pipeline. To accomplish this type shall be made, if necessary, at point of highest elevation, and after completion of the test the taps shall be tightly plugged unless otherwise specified.
During the test, all expose pipes, fittings, valves joints and couplings will be carefully examined. Defective materials shall be removed and replaced with sound materials at the Contractor’s expense. The test shall be replaced until a satisfactory result has been obtained.
17.02 PRESSURE TESTS FOR WATER LINES:
A. After the pipe have been installed, the joints completed and with joints exposed for examination, all newly installed pipe or any valve section therefore, shall be subjected to hydrostatic pressure 1 1/2 the designed working pressure of the system or as specified by the Architect.
B. The duration of each pressure test shall be at least 10 minutes unless otherwise specified by the Architect.
C. Each section of pipeline shall be slowly filled water and the specified test pressure, measured at the point of lowest elevation, shall be applied by means of a pump connected to the pipe in a manner satisfactory to the Architect. During the filling of the pipe and before applying the test pressure, all air shall be expelled from the pipeline. To accomplish this type shall be made, if necessary, at point of highest elevation and after completion of the test the taps shall be tightly plugged unless otherwise specified. During the test, all exposed pipes, fittings, valves, joints and couplings will be carefully examined. Defective materials shall be removed and replaced with sound materials at the Contractor’s expense. The test shall be then be repeated until satisfactory results are obtained.
17.03 DEFECTIVE WORK:
A. If the inspection or test shows any defect, such defective work or material shall be replaced and the test shall be repeated until satisfactory to the Architect.
B. All repairs to piping shall be made with new material at the expense of the contractor.
C. No caulking of screwed joints of holes will be accepted.
17.04 DISINFECTION OF WATER DISTRIBUTION SYSTEM AND WATER TANKS
( as per AWWA C-601 )
A. The entire water system shall be thoroughly flushed and disinfected with chlorine before it is placed on operation. Water tanks shall be washed and swabbed.
B. Chlorination materials shall be liquid chlorine or hypochlorite, as specified and shall be introduced into the water lines in manner approved by the Engineer. Tanks shall be thoroughly cleaned of all debris, dirt or dust before swabbing.
C. The chlorine dosage shall be such as to provide not less than fifty parts per million (50ppm.) or available chlorine.
D. Following a contact period of not less than sixteen (16) hours, the heavily chlorinated water shall be flushed from the system with clean water until the residual chlorine content os not greater than two tenth (0.20 ppm.). All valves in water lines being sterilized shall be opened and closed several times during the 16-hour chlorinating period.
PART 18 CLEANING :
A. All exposed metal surfaces shall be free of grease, dirt or other foreign materials.
B. Chrome or nickel plated piping, fittings and trimmings shall be polished upon completion.
C. All plumbing fixtures shall be properly protected from use and damage during the construction stage. The fixtures shall be cleaned to the satisfaction of the Architect upon completion & prior to acceptance of work.
D. All equipment, pipes, valves and fittings shall be cleaned of grease and sludge which may have accumulated. The Contractor shall repair any clogging, discoloration or damage to other parts of the building due to the system.
PART 19 PAINTING AND PROTECTION :
A. All exterior of piping to be installed in or through concrete floor or fill floors and underground shall be given one coat of acid resisting paint having a bituminous base.
B. Pipe hanger, supports and all other iron work in concealed spaces shall be painted with one coat of asphalt.
Exposed galvanized iron pipes and fittings that are asphalt coated shall be given two coats of shellac prior to application of two coats of iol paint as directed by the Architect or Engineer.
PART 20 COLOR CODE FOR EXPOSED PIPES:
All exposed piping shall be adequately and durably identified by distinctive colored paints as follows:
ITEM COLOR CODE
cold water pipe blue
hot water pipe blue w/ red 25mm band @ every 1 m. O.C
storm water pipe aluminum
sewage pipe black
vent pipe green
waste pipe gray
PART 21 WARRANTY & "AS-BUILT" PLANS :
A. All works, equipment and fixtures shall be guaranteed by the Contractor for satisfactory service for a minimum period for one (1) year.
B. The Contractor shall submit to the Owner, in reproducible form plus three (3) sets of white prints, the complete plans of the entire system as actually built. The cost of these shall be borne by the Contractor. Submittal of "AS BUILT" Plans shall be a condition to final payment.
C. Equipment shall have the Owner (s) your minimum guaranteed against defective designs, materials and workmanship.
1. Booster pumps
2. Plumbing Fixture
PART 22 RESPONSIBILITIES:
The general Contractor shall be responsible for the coordination among the different trades on the job in order to finish the work in the least possible time, in strict accordance with the Plans and Specification.
1. Throughout the construction period open ends of all temporary plugs.
Drainage lines shall not be used to conduct dirty construction wash water especially those with cement mixes to avoid possible clogging.
The Sprinkler Contractor shall provide a temporary fire protection system during the construction period. This shall be of sufficient capacity to put out any fire that may break out at any floors due to construction operations. This is in addition to temporary fire extinguisher required & supplied by the Sprinkler Contractor.
A temporary potable water supply shall be made available to construction workers at every floor as construction progresses.
The Contractor shall provide a temporary human excreta disposal system to serve the workers during the construction period.
S. ISON & Associates