house connection from mains, laying and joints in pipes

House connection from mains , laying and joints in pipes

HOUSE WATER

CONNECTION¤ Ferrule

¤ Goose neck

¤ Service pipe

¤ Stop cock

¤ Water meter

ferrule• Right angled sleeve

made of brass and

gun metal

• Size: 10 to 50 mm

dia

Goose neck• Small curved pipe

made of flexible

material

• Length : about 75mm

• Forms flexible

connection between

the water main and

the service pipe

Service pipe• Galvanized iron pipe of size less

than 50mm dia

• Laid underground

• Connected to main through ferrule

and goose neck

Stop cock• Screw down type valve

used for stopping and

opening water supply

• Generally provided

before the water enters

the water meter

• Also provided inside the

building

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

diaphragm•  A flexible, pressure

responsive element

that transmits force to

open, close or control

a valve

• Repairs can be made

without interrupting

pipe line

Diaphragm valve

Pipe Fittings• Bends

• Crosses

• Tees

• Elbows

• Wye

• Plugs

• Flanges

• Caps

• Reducer

Water taps

• Types of valves

provided at the

end of house

service for

withdrawing water

• Most common – bib

cocks

Storage of water in

buildings• Necessary as municipal supplies are

not available throughout the day

• Helps to meet static fire demand

• Provide uninterrupted supply in case

of repair or power failures

• Helps to supplement direct municipal supply in case of excess or peak demand

The water storage capacity of

buildings depend upon :

• Hours of supply

• Rate of supply

• Demand pattern in the building

• Fire storage required

The types of water storage required in

buildings are :

• Overhead storage

• Underground storage

Water piping system in

building

• Piping system using direct supply

• Piping system using overhead tanks

• Piping system using under- ground-

overhead tank supply

• Pumped system

• Other system

– Continuous running system

Piping system using direct supply

Piping system using overhead tanks

Piping system using under- ground- overhead tank supply

Pumped system

Other system- Continuous running system

Disinfection of pipe line

before use• Keeping pipes full with water and

adding in chlorine

• Flushing away the residue by treated

water

Cast Iron ( C.I)

Pipes• Widely used for city water supplies

• Length – about 3.5m

• Moderate in cost

• Easy to join

• Strong and durable

• Corrosion resistant

• Long life up to 100 years

• Service connections can be easily

made

Joints in c.i pipes

Types of joints

–Socket and spigot joint

–Flanged joint

–Mechanical joint called dresser

coupling

–Flexible joint

–Expansion joint

Socket and spigot joint

• Also called bell

and spigot joint

• Enlarged end-

socket

• Normal end- spigot

• Flexible joint

• Allows pipes to be

laid on flat curves

Flanged joint• Used where

occasional disjoint of

pipes are required

• Strong

• Cannot be used

where deflections

and vibrations are

expected

• Expensive

Mechanical joint• Also called

dresser coupling

• To join plain end

of cast iron pipe

• Metallic collar is

fitted

• Strong

• Withstand

vibrations

Flexible joint• Used when large scale

flexibilities are required

• Spherical socket

• Plain spigot having a

bead at the end

Expansion joints

• Provided at suitable intervals

to counteract the thermal

stresses produced due to

temperature variations

• Socket end is flanged and

spigot end is plain

Any questions ???

Thank you