The document discusses various components of household water and drainage systems. It describes the ferrule, goose neck, service pipe, stop cock, and water meter that comprise the water connection to a house. It then explains common drainage system terms like soil pipe, waste pipe, vent pipe, and rainwater pipe. The document outlines sizes for different types of pipes and the objectives of drainage systems. Finally, it discusses different types of traps (P, Q, S traps), floor traps, gully traps, and intercepting traps used in plumbing systems.

1. BUILDING SERVICES-II
(PLUMBING)
AR. HENA TIWARI
ASSISTANT
PROFESSOR
GCAD (JAN-JULY
2018)
LECTURE-VI
WATER
CONNECTION

2. HOUSE WATER CONNECTION
1. Ferrule
2. Goose neck
3. Service pipe
4. Stop cock
5. Water meter
FERRULE
 Right angled sleeve
made of brass and gun
metal
 Size: 10 to 50 mm dia

3. GOOSE NECK
Small curved pipe made of
flexible material
Length : about 75mm
Forms flexible connection
between the water main and
the service pipe

4. SERVICE PIPE OR COMMUNICATION PIPE
 Galvanized iron pipe of size less than 50mm
dia
 Laid underground
 Connected from meter to main via ferrule and
goose neck.

5. STOP COCK
 Screw down type valve used for stopping and opening water
supply
 Generally provided before water enters the water meter
 It is also provided inside the building

6. WATER METER
 Measures and records the
quantity of water consumed
 Generally fixed in an iron box
fitted in an opening or cavity and
covered with movable iron cover
 2 types :
 Velocity meters
 Positive meters

7. SOME COMMON TERMS:
 SOIL PIPE: A soil pipe is a pipe through which human excreta
flows.
 WASTE PIPE: It is a pipe which carries only the waste water,
such as that from a sink, bath, or shower. It does not carry
human excreta.
DRAINAGE

8.  VENT PIPE: It is a pipe which is provided for the purpose of
the ventilation of the system. A vent is open at top and
bottom, to facilitate exit of foul gases. It is carried at least one
meter higher than the roof level.
 RAIN WATER PIPE: It is a pipe which carries only the rain
water.
 ANTI-SIPHONAGE PIPE: It is pipe which is installed in the
house drainage to preserve the water seal of traps.

9. SIZES OF PIPES
 SOIL PIPE:100-150MM
 WASTE PIPE: HORIZONTAL: 30-50MM
 WASTE PIPE: VERTICAL: 75MM
 RAINWATER PIPE: 75-100MM
 VENT PIPE: 50MM
 ANTI SIPHONAGE PIPE:
 CONNECTING SOIL PIPE: 50MM
 CONNECTING WASTE PIPE: 40MM

10. OBJECTIVES OF DRAINAGE SYSTEM
 To maintain healthy conditions in the building.
 To dispose off waste water as early and quickly as possible.
 To avoid the entry of foul gases from the sewer or the septic
tank.
 To facilitate quick removal of foul matter.
 To collect and remove waste matter systematically .

11. SANITARY FITTINGS-TRAPS
Traps are defined as fittings at the end of soil
pipes or waste pipes to prevent foul gases
coming out of the soil pipe/ waste pipe.

12. INTRODUCTION
Traps are an integral part of a
modern sanitary system, being
designed to retain a small
quantity of the waste water
from the discharge of fitting to
which they are attached as a
barrier to prevent foul air
entering the building.

13. Traps should be self-cleaning, that is to say , they should be
designed so that their walls are scoured by the discharging water.
 One of the advantages of modern traps constructed of plastic
materials is the ease with which they may be dismantled for
cleaning.

14. CLASSIFICATION OF TRAPS
 Depending upon the shapes the traps are classified as:
1. P-trap
2. Q-trap
3. S-trap
 Above three types of traps are shown in the following figures.
 The depth of a trap seal would depend upon the usage of a pipe.
The trap seal varies from 25 to 100 mm deep.

15. FLOOR TRAP (NAHANI TRAP)
 These are provided in floors to collect waste water from
kitchen sinks, bathroom floors, washing floors etc.
 It is the starting point of flow of waste flow.
 It is made of cast iron or PVC.
 Depth of water seal should not less than 40mm.
OTHER TRAPS

16. GULLY TRAP
 The gulley trap is usually provided at the junction of main waste
pipe and the floor waste pipe.
 They are provided near the external face of wall.
 This is a deep seal trap of about 60-70mm.

17. INTERCEPTING TRAPS
 It is provided at the last manhole i.e. at the junction of House
drain and the Public Sewer.
 It is made of an inspection arm for the purpose of cleaning or
inspection.
 It is also known as inspection chamber.
 The water seal is not less than 100mm.

18. BOTTLE TRAP
 Generally placed in wall hanging type of WB’s & Sinks.