chapt3: general regulations

Question 1

* Section 302-GRADE OF HORIZONTAL DRAINAGE PIPING

Horizontal drainage pipes shall be run in practical alignments and at a uniform slope between manholes of not less than () toward the point of
disposal, provided that, where it is impracticable to obtain a 2% slope due to the following constraints in: ( l) excessive depth of the proposed drainage line~ (2} structural and/or geological features of the terrain; and (3) existing adverse in
arrangements of building or structure; any such pipe or piping 102mm or larger in diameter may have a slope of () provided it is first approved by
the Administrative Authority.

Answer 1

20 mm/m or 2%
10 mm/m or 1%

Question 2

303.1

Changes in direction of drainage piping shall be made by the use of
approved pipe fittings and shall be of the angles presented by a () or other approved fittings of longer sweeps.

Answer 2

22 1/2° bend,
45° bend,
60° bend

Question 3

303.2

Horizontal drainage lines connecting to a vertical stack shall enter through (), sanitary tee or other approved fittings of longer sweeps. No fitting having more than one inlet at the same level shall be used unless such fitting is constructed so that the discharge trom one inlet cannot readily enter into the other inlet.
Vertical installation of double sanitary tees may be used when the barrel of
the fitting is at least two (2) pipe sizes larger than the largest side inlet.
Nominal pipe sizes recognized for these purposes are: 51, 63, 76, 89, 102,
114, 127 & 152 mm. diameters.

Answer 3

45° or 60° wye branches, combination wye and 1/8 bend branches

Question 4

303.4

Vertical drainage lines connecting to horizontal drainage line shall enter through (), or other approved fittings of longer sweep () may be used only when installed in a true verticai position

Answer 4

4S-degree branches
Sixty (60) degree branches or offsets

Question 5

Sft:tion 304 -· CONNECTIONS TO I)LllMlUNG SYSTEM REQlliRED

All plumbing fixtures, drains, appurtenances and appliances used to receive or discharge liquid wastes or sewage, shall be connected properly to the () of the building and premises, in accordance with the requirements of this Code.

Answer 5

drainage systems

Question 6

305.2

When a Public or Private Sewer is not available for use, excreta drainage piping from buildings and premises shall be connected to an approved ()

Answer 6

Private Sewage Disposal System

Question 7

306.1

It shall be () for any person to deposit, by whatever means into any plumbing fixture, floor drain, interceptor, sump, receptacle or device, connected to the excreta and storm drainage systems, public sewer, private sewer, septic tank or cesspool, any ashes, cinders, solids, rags, fl ammable, poisonous or explosive liquids or gases; oils, greases or other things **which would or could cause. damage to the drainage system or public sewer. **

Answer 7

unlawful

Question 8

306.2

Roofs, inner courts, vent shafts, light wells or similar areas having () shall discharge outside of the building or to the gutter, and shall not be connected to the soil and waste pipe systems.

Answer 8

rainwater drains

Question 9

307.2

Sewage or other waste from a plumbing system which may be deleterious to
surface or subsurface waters, shall not be discharged into the ground or into any waterway unless first rendered innocuous through subjection to some acceptable form of ().

Answer 9

treatment

Question 10

310.2

It shall be unlawful to () in materials by welding, brazing or soldering the defects or by using therein or thereon any paint, wax, tar, or other sealing or repair agents.

Answer 10

conceal cracks, holes, or other imperfection

Question 11

313.1

In existing building or premises where plumbing installations are to be
() deviations from the provision of this Code are permitted, provided such deviations are necessary and first approved by the Administrative Authority.

Answer 11

altered, repaired or renovated,

Question 12

314.1

All pipings passing under or through walls shall be protected from breakage with embedded (). All pipes passing through or under
cinders or other corrosive materials shall be protected from external corrosion by encasing same with polyethylene sheath or in other approved manner. Approved provisions shall be made for expansions of hot water pipings.
Void between pipes and sleeves through concrete floors in the
ground shall be appropriately sealed with bitumen.

Answer 12

metal pipe sleeves

Question 13

314.4

No building sewer or other drainage pipings or part thereof, constructed of materials other than that approved for use under or within the building, shall be installed under or within () of any building or structure, nor less than 0 3 meter below the finish ground surface.

Answer 13

0.6 meter

Question 14

315.1.1

Cast Iron Soil Pipe - Bell & Spigot and Hubless pipe shall be supported at () or closer.

Answer 14

every storey

Question 15

315.1.2

Scewed Pipe -· Iron Pipe Size (IPS) shall be supported at not less than () height ..

Answer 15

every other storey

Question 16

3 15 . 1. 3

Copper Tubing - shall be supported at () or at maximum intervals of () on center.

Answer 16

each storey
3 meters

Question 17

315.1.4

Lead Pipe - shall be supported at intervals not exceeding () at
centers with a rigid vertical back-up

Answer 17

1.20 meters

Question 18

315.1.5

Plastic Pipe - shall be supported at every ()

Answer 18

one- ( 1) meter interval.

Question 19

315.2.2

Cast Iron Soil Pipe - Where joints occur, suspended cast iron soil pipe
shall be supported at not more than () intervals; except that
pipe exceeding I. S meters length, may be supported at not more
than J meters intervals.

Supports shall be adequate to maintain alignment and to prevent sagging and shall be placed within ()
of the hub or joint.

Hubless or compression gasket joints must be supported at least at every other joint except that when the developed length between supports exceeds (), they shall be provided at each joint Support shall also be provided at each horizon branch connection, placed on or imediately adjacent to the coupling suspended lines shall be suitably braced to prevent horizontal movement

Answer 19

1.5 meters
0.45 meters
1.2 meters

Question 20

315.2.3

Screwed Pipe - IPS except as provided in other Sections of this Code,
shall be supported at approximately () diameter and smaller and () and larger in diameter.

Answer 20

3.0 meters intervals for piping 19 mm
3.6 meters intervals for piping 25 mm

Question 21

315.2.4

Copper Tubing - shall be supported at approximately () intervals for piping () and smaller and () for pipings () and larger in diameter

Answer 21

1.8 meters
38mm diameter
3.0 meters intervals
51mm

Question 22

315.2.5

lead Pipe - shall be supported by stiff metal or wooden backing for its () with hangers properly spaced.

Answer 22

entire length

Question 23

315.2.6

In Ground - piping buried in the ground shall be laid on a firm bed for its (), except where concrete cradle support is provided,
which is adequate and approved by the Administrative Authority.

Answer 23

entire length

Question 24

315.2.7

Plastic Tube - shall be supported by stiff metal or wood backing with
hangers in its () for small-size tubings up to **38 mm diameter ** and without backings but with spaced metal hangers at approved spacing for larger-size tubings.

Answer 24

entire length

Question 25

315.3.1

Materials - for hangers and anchors shall be of sufficient strength
to maintain their proportional share with the ()

Answer 25

weight of the pipe and
its content.

Question 26

315.3.2

All pipings, fixtures and equipment shall be adequately () to the satisfaction of the Administrative Authority.

Answer 26

anchored or supported

Question 27

316.1

Tunneling and driving may be done in yard, court or driveway of any
building site. Where there is sufficient depth, tunneling may be used
between open cut trenches. Tunnels shall have a clear height of 0.6 meter above the pipe and shall be limited in length to () the depth of the trench, wd. a maximum length of (). When pipe is driven, the drive pipe shall be at least one pipe size larger than the pipet to be laid.

Answer 27

one-half (1/2)
2.4 meters

Question 28

316.3

All excavations shall he completely back-tilled as soon as possible after inspection.
Adequate precaution shall be taken to ensure proper compactness of backfill around pipes without damage to such pipe
Trenches shall be back-filled in thin layers of () above the top of the
pipe with () which shall not contain stones, boulders, cinders ~
other materials which can damage or break the pipes or cause con:osfve
action. Mechanical devices or equipment such as bulldozer, grader, etc.,
may then be used to complete the back-filhng to grade. The filling shall be
properly compacted
Suitable precautions shall be taken to ensure permanent stability for pipes la.id in filled or made ground.

Answer 28

0.3 meter
clean earth