Tiêu đề 8. PC VIII.pdf ✅

KIPPAP EDUCATION Plumbing Code VIII CHAPTER 11: STORM DRAINAGE SYSTEM Section 1101 - GENERAL ❖ Storm drainage are required for roof areas, courts and courtyards to collect stormwater and discharge the stormwater to an approved point of disposal not in conflict with other ordinances or regulations Section 1102 - RAINWATER SYSTEMS ❖ Rainwater downspout or conductor pipings placed within the interior of a building inside a vertical pipe chase or run within a vent shaft shall be of cast iron, galvanized steel, iron, brass, copper, lead, Schedule 40 ABS, DWV, Series 1000, PVC DWV or other approved materials. ❖ Rainwater downspout or conductor located on the exterior side of a low height building shall be not less than 26 ga. galvanized sheet metal. The bottom of the conductor draining over the catch basin storm drain or storm sewer is protected from damage by connecting a stronger material such as steel pipe or cast iron at its lowest section. ❖ Rainwater piping located within a medium height building basement area shall be of galvanized iron pipe, Schedule 30, cast iron soil pipe, S.W., Type DWV copper tube; Schedule 40 ABS, DWV, Series 1000, PVC DWV, or other approved materials. ❖ Downspouts for high-rise buildings shall be of stronger pipe materials to resist the high hydrostatic pressure inside the vertical downspout installed within the pipe chase which has no intermediate branch from the roof to the ground level. ❖ Rainwater piping commencing 0.6 meter from the exterior of a building may be of suitable approved materials. ❖ Rainwater piping shall not be used as soil, waste & vent pipes. SECTION 1103 - ROOF DRAIN ❖ Roof drains shall be of cast iron, copper, or other corrosion-resistant materials. ❖ Roof drains shall be equipped with strainers extending not less than 102 mm above the surface of the roof immediately adjacent to the drain. ❖ Dome-Type Strainers shall have a minimum total net inlet area of 1-1⁄2 times the area of the outlet pipe to which it is connected. ❖ Roof deck strainers for use on sun decks, parking decks, and similar occupied areas shall be an approved flat-surface type which is level with the deck. Such drains shall have a total net inlet area not less than 2 times the area of the outlet pipe to which the drain is connected. SECTION 1104 - SIZING OF RAINWATER PIPING ❖ Normally, a 102 mm/hour rainfall intensity is used around Manila area. ❖ For 1 wall - add 50% of wall area to roof area. ❖ For 2 adjacent walls - add 35% of total wall area to roof area. ❖ For 2 opposite walls of same heights - add no additional area. ❖ For 2 opposite walls of different heights - add 50% of wall area above top of lower wall to the roof area. ❖ The area of the side of a tall building exposed to rain is taken as 1⁄2 of the gross area. ❖ The sizing data for vertical conductors, leaders, and drains is based on the pipes flowing 7/24 full. ❖ Vertical piping may be round, square, or rectangular. ❖ Square pipe shall be sized to enclose its equivalent round pipe. ❖ Rectangular pipe shall have at least the same cross-sectional area as its equivalent round pipe, except that the ratio of its side dimensions shall not exceed 3 to 1. ❖ Depth of equivalent area of rectangular gutter = 0.392D ❖ Width of rectangular gutter = 0.8862D
KIPPAP EDUCATION Plumbing Code VIII Let’s Review! 1. Dome-Type Strainers shall have a minimum total net inlet area of ____ times the area of the outlet pipe to which it is connected. a. 1-1⁄2 b. 2 c. 3 d. 2-1⁄2 2. Normally, a ______ rainfall intensity is used around Manila area. a. 102 mm/hour b. 152 mm/hour c. 52 mm/hour d. 201 mm / hour 3. Roof drains shall be equipped with strainers extending not less than _____ above the surface of the roof immediately adjacent to the drain. a. 25.4 mm b. 152 mm c. 76 mm d. 102 mm CHAPTER 12: HOUSE DRAINS AND HOUSE SEWERS SECTION 1201 - SEWER REQUIRED ❖ Every building and every premises having a plumbing system shall have a connection to a public or private excreta sewerage system. ❖ The public sewer may be considered as not being available when such public sewer or any exterior drainage facility connected thereto is located more than 61 meters from any proposed building or exterior drainage facility on any lot or premises thereat. SECTION 1202 - DAMAGE TO PUBLIC SEWER OR PRIVATE SEWAGE DISPOSAL SYSTEM ❖ It shall be unlawful for any person to deposit into any plumbing fixture, catch basin, floor drain, interceptor, sump, receptacle or device which is connected to any excreta plumbing and storm drainage systems, public sewer, private sewer, septic tank or cesspool any ashes, cinders, solids, rags, flammable, poisonous, explosive liquids or gases, oils, grease, and other things whatsoever which would, or could cause damage to the public sewer or private sewage disposal system. ❖ No rain, surface or subsurface waters shall be connected to or discharged into any excreta drainage system. ❖ No cesspool and septic tank effluents, seepage pit or underdrain system shall be connected to the excreta building sewer leading to public sewer main. ❖ No commercial food waste grinder shall be connected to a private or public sewage disposal system. SECTION 1203 - BUILDING SEWER MATERIALS ❖ The building sewer, beginning 0.6 meter from the outside face of the wall of the building or structure, shall be of such materials as approved by the Administrative Authority.
KIPPAP EDUCATION Plumbing Code VIII SECTION 1204 - MARKINGS ❖ All pipes, bricks, blocks, prefabricated septic tanks, prefabricated tank or seepage covers or other parts or appurtenance incidental to the installation of building sewers or private sewage disposal systems shall conform to the approval requirements and shall be marked and identified in a manner satisfactory to the Administrative Authority. SECTION 1205 - SIZE OF BUILDING SEWERS ❖ No building sewer shall be smaller than 150 mm diameter nor less than in size than the building drain. SECTION 1206 - GRADE, SUPPORT, AND PROTECTION OF BUILDING SEWER ❖ Recommended slope: 2% ❖ Allowable slope for 102 mm and larger: 1% ❖ Allowable slope for 203 mm and larger: 0.5% ❖ Building sewer piping shall be laid on a firm bed throughout its entire length. ❖ No building sewer or other drainage piping or part thereof, constructed of materials other than those approved for use underground shall be installed not less than 0.6 meter from the outer face of any building foundation or wall, nor less than 0.3 meter below the finish surface of the ground. SECTION 1207 - CLEANOUTS ❖ Cleanouts shall be placed inside the building near the connection between the building drain and the building sewer or installed outside the building at the lower end of the building drain and extended to grade. ❖ Two-way cleanout fitting installed at connection point of building drain and building sewer outside the building may be installed in lieu of a single clean-out. ❖ Additional building sewer cleanouts shall be installed not to exceed 15 meter on center in straight runs and for each aggregate change in direction exceeding 135 degrees. ❖ When a building sewer or a branch thereof does not exceed 3 meters in length and is a short straight line extension from a building drain which is provided with a cleanout, no cleanout will be required at its point of connection to the building drain. ❖ All required building sewer cleanouts shall be extended to grade. ❖ Each cleanout shall be installed so that it opens to allow cleaning of horizontal lines in the direction of flow of the soil or wasteline or at right angles thereto, and except in the case of wye branch and end-of-line cleanout, shall be installed vertically above the flow line of the pipe. ❖ Approved manholes may be installed in lieu of cleanouts when approved by the Administrative Authority. ❖ The maximum distance between manholes shall not exceed 91 meters. ❖ The inlet and outlet pipe connections of manholes shall be made by the use of flexible compression joints no closer than 0.3 meter from outside of the manhole. No flexible compression joint shall be embedded in the manhole base. SECTION 1208 - SEWER AND WATER PIPES ❖ Building sewer or drainage piping of clay or materials which are not approved for use within a building shall not be run or laid in the same trench as the water pipes unless both of the following requirements are met: ➢ The bottom of the water pipe shall be at least 0.3 m above the top of the sewer or drain line. ➢ Minimum clear horizontal distance of at least 0.3 m. ❖ Water pipe joints shall be installed not less than 3 meters away from sewer line in both directions.
KIPPAP EDUCATION Plumbing Code VIII SECTION 1209 - LOCATION ❖ No building sewer shall be located in any lot other than the lot which is the site of the building structure served by such sewer. SECTION 1210 - ABANDONED SEWERS AND SEWAGE DISPOSAL FACILITIES ❖ Every abandoned building (house) sewer, or part thereof, shall be plugged or capped in an approved manner within 1.5 meters of the property line. ❖ Every cesspool, septic tank, or seepage pit which has been abandoned shall have the sewage removed therefrom and be completely filled with earth, sand, gravel, concrete, or other approved materials. ❖ After inspection, the cesspool, septic tank or seepage pit shall then be filled to the level of the top of the finish ground. ❖ Where disposal facilities are abandoned, the permittee making the connection shall fill all abandoned facilities as required by the Administrative Authority within thirty (30) days from the time of connecting the sewer service line to the public sewer. Let’s Review! 4. The maximum distance between manholes shall not exceed _____ meters. a. 61 b. 91 c. 103 d. 152 5. Water pipe joints shall be installed not less than ______ away from sewer line in both directions. a. 3 meters b. 0.3 meters c. 3.3 meters d. 33 meters 6. After inspection, the cesspool, septic tank or seepage pit shall then be filled to the level of the ________. a. highest point b. cover c. max capacity d. top of the finish ground