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The pipe is called a ______ pipe when it receives human waste from the soil branch.
soil
Pipe installations that fail or break too soon may have been due to the use of too many ______.
fittings
Do not use short radius ______ on a vertical to horizontal directions or horizontal to horizontal changes.
fittings
The waste pipe installation must be provided with an ample number of ______, strategically located, to be opened in case of pipeline trouble.
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A ______ is a receptacle of the plumbing system accessible on floor, walls, or ceiling.
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The location of the ______ must be indicated in the plan.
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The Y and 45˚ ______ are most appropriate for vertical to horizontal direction of changes.
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The use of the T ______ on horizontal installation will create a tilted or crooked joint connection called ‘Premature Waste Line Defects’.
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The cleanout must be sized equal to the diameter of the ______ pipe.
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Cleanouts may be omitted on a horizontal drain line less than ______ meter in length.
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Each horizontal drainage pipe shall be provided with a cleanout at its ______ terminal.
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Cleanouts may be omitted on short horizontal drainage pipe installed at a slope of ______ degrees or less from the vertical line.
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Table 7-4 shows the size of pipe and the corresponding size of ______.
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Cleanouts are required every ______ meter length of horizontal drainage pipe.
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Waste pipe and soil pipe are covered in Section ______ of the Revised National Plumbing Code of the Philippines.
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The cleanout must be readily accessible to the ______ in case of waste line stoppage.
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Each cleanout in piping larger than ______ mm shall have a clearance of not less than 0.45 m.in front of the cleanout.
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Minimum clearance “X” is ______ mm if pipe size “D” = 51 mm or less.
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Cleanouts in underfloor piping shall be extended to or above the ______ floor or shall be extended outside the building when there is less than 0.45 m.vertical and 0.75 m.horizontal clearance from the means of access to such cleanout.
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No underfloor cleanout in any residential occupancy shall be located more than ______ m.from an access door, trap door, or crawl hole.
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Cleanout fittings shall be not less than in size than those given in Table ______.
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Cleanout shall be provided for ______ drainage system.
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Countersunk cleanout plugs shall be installed where raised heads may cause hazard to ______ personnel or vehicles.
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Countersunk cleanout plugs shall be installed where raised heads may cause hazard to passing ______ or vehicles.
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An approved type of two-way ______ fitting, may be substituted for an upper terminal cleanout.
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Each ______ extension shall be considered as drainage piping.
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Each ninety 90 degrees ______ extension shall be extended from a wye type fitting or other approved fitting of equivalent sweep.
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Each ______ for an interceptor shall be outside of each interceptor.
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Each ______, unless installed under an approved cover plate, shall be above grade, readily accessible, and so located to serve the purpose it is intended.
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Each ______ in piping 51 mm or less in size shall be installed so that there is a clearance of not less than 305 mm in front of the ______.
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A ______ type of two-way cleanout fitting, installed inside the building wall near the connection between the building drain and building sewer or installed outside of a building at the lower end of the building drain and extended to grade, may be substituted for an upper terminal cleanout.
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SECTION 706 deals with ______ in the REVISED NATIONAL PLUMBING CODE OF THE PHILIPPINES.
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Increasing the size of the drainage pipe does not guarantee effective ______ action, or self-cleaning ability of the pipe.
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Water flow inside a larger pipe is relatively ______.
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Drainage pipe must be of the right size to have a liquid flow of about ______ % of the pipe diameter.
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For instance, if the pipe is 100mm diameter, the water flow inside the pipe must have a depth of ______ mm to attain the scouring action.
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Too small pipeline is subject to ______ of flow.
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The tendency is to create ______, siphonage, and floor flooding.
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Waste Pipe is classified into two types depending upon the kind of ______ it will serve.
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See Revised NPCP.Table ______-2 Page. 80
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Study Notes
Waste Pipe and Soil Pipe
- Waste pipe is classified into two types depending on the kind of fixtures it will serve.
- Soil pipe receives human waste from soil branch.
- Stack pipe is installed vertically and is classified as a Waste Stack if not.
Conservative Use of Fittings
- Using too many fittings or the wrong type of fittings can cause pipe installations to fail or break too soon.
- Recommendations for using fittings:
- Avoid short radius fittings on vertical to horizontal directions or horizontal to horizontal changes.
- Use long sweep fittings on horizontal changes.
- Use Y and 45° fittings on vertical to horizontal direction changes.
- T fittings are designed for vertical run with lateral branches only and should not be used on horizontal installations.
Location of Cleanout
- Cleanout is a receptacle of the plumbing system accessible on floor, walls, or ceiling.
- Cleanout must be indicated in the plan and sized equal to the diameter of the waste pipe.
- Cleanout must be readily accessible to the plumber in case of waste line stoppage.
- Location of cleanout must be indicated in the plan.
Revised National Plumbing Code of the Philippines (Section 706. Cleanouts)
- Each horizontal drainage pipe shall be provided with a cleanout at its upper terminal and every 15 meters length.
- Cleanouts may be omitted on horizontal drain lines less than 1.50 meters in length unless serving sinks or urinals.
- Cleanouts may be omitted on short horizontal drainage pipes installed at a slope of 72 degrees or less from the vertical line.
- An approved type of two-way cleanout fitting may be substituted for an upper terminal cleanout.
- Each cleanout extension shall be considered as drainage piping.
- Each cleanout for an interceptor shall be outside of each interceptor.
- Each cleanout, unless installed under an approved cover plate, shall be above grade, readily accessible, and so located to serve the purpose it is intended.
Cleanout Size and Clearance
- Size of cleanout and threads per 25.4 mm:
- 38 mm pipe: 38 mm cleanout, 11-1/2 threads per 25.4 mm
- 51 mm pipe: 38 mm cleanout, 11-1/2 threads per 25.4 mm
- 64 mm pipe: 64 mm cleanout, 8 threads per 25.4 mm
- 76 mm pipe: 64 mm cleanout, 8 threads per 25.4 mm
- 102 mm pipe and larger: 89 mm cleanout, 8 threads per 25.4 mm
- Minimum clearance in front of the cleanout:
- 305 mm for pipes 51 mm or less in size
- 450 mm for pipes larger than 51 mm in size
Uniform Plumbing Code Committee's Findings
- Increasing the size of the drainage pipe does not guarantee effective scouring action or self-cleaning ability of the pipe.
- Water flow inside a larger pipe is relatively shallow, causing solid waste to remain at the bottom of the pipe.
- Drainage pipe must be of the right size to have a liquid flow of about 50% of the pipe diameter.
- For instance, if the pipe is 100 mm diameter, the water flow inside the pipe must have a depth of 50 mm to attain the scouring action.
- Too small a pipeline is subject to overloading of flow, creating back-pressure, siphonage, and floor flooding.
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Description
This quiz covers the basics of waste and soil pipes, their differences, and the importance of conservative use of fittings in pipe installations.
