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