-
7/30/2019 Drainage syesterm
1/17
INTRODUCTION
THE SIMPLE DOMESTICDRAINAGE
THE BASIC PRINCIPALES OF GOODDRAINAGE
THE SYESTEM OF DISPOSAL DOING BYLOCALAUTHORITY
INSPECTION CHAMBERS
RAIN WATER DRAINAGE
THE MATERIALS USED IN DRAINAGE &PLUMBING
IDENTIFY THE PLUMBING MATERIYALS PRIZEIDENTIFYTHE FAMOUS
PLUMBING MATERIYALSCOMPANY
-
7/30/2019 Drainage syesterm
2/17
EXAMPLE OF SOME PLUMBING IMAGES
PLUMBING TOOLS
QUESTIONS TIME
-
7/30/2019 Drainage syesterm
3/17
THE SIMPLE DOMESTICDRAINAGE
The drainage system is a pipe work ,usually installedbelow the
ground level to convey the discharge
from sanitary fittings
The rain water gutter and down pipes are suitable
disposals installation
The methodofdisposal
The usual method of disposal is to connect the pipework to the
public sewer
the second method is cesspool: The letter is collection
tank to hold the discharge until it can be collected in
Special tanker lorry
-
7/30/2019 Drainage syesterm
4/17
THE BASIC PRINCIPALES OF GOODDRAINAGE
The material should have good strength and durabilityDiameter of
drain :if it's dwelling minimum 100mm
if its public sewer- minimum 150mm
Every part of drain should have inspection and cleaning
facility
Drain should be laid in straight runs as far as possible
Every drain inlet should be trapped to prevent the entr
Inspection chambers, manholes. access fittings shouldplaced
changes of direction
Avoid drains under the buildings
Drain which are within 1m depth from the foundation
-
7/30/2019 Drainage syesterm
5/17
THE SYESTEM OF DISPOSAL DOING BYLOCALAUTHORITY
COMBINEDSYESTEM:all the drains discharge in to common, combined
sewer
Its simple and economical method, easy maintenance
Disadvantage of this method
All the discharges must pass through the sewage
treatment installation, which could be costly and prove
to be difficult with periods of heavy rain,
-
7/30/2019 Drainage syesterm
6/17
TOTALLY SEPARATE SYESTEM
The most common method by Local Authorities' two
sewers are used in this method. one sewer receives
the surface water discharge and conveys this direct
to suitable out fall such as river where it is discharge
without treatment. the second sewer receive all the soil or foul
discharge
from baths, basins, sinks, shower, and toilets. this is
then conveyed to the sewage treatment installation
-
7/30/2019 Drainage syesterm
7/17
PARTIALLY SEPARATE SYESTEM
This the compromise of the other two system and isfavored by
some local authority because of its
flexibility. two sewer are used, one to carry surface
water only and the other to act as a combined sewer
-
7/30/2019 Drainage syesterm
8/17
-
7/30/2019 Drainage syesterm
9/17
INSPECTION CHAMBERS
Deep inspection chambers are called manholes :They a box
containing half or three-quarter section
round channels to enable the flow to be observed; at
the same time providing the access point to the drain
for the purpose of cleaning.The simple domestic drainage
normally only concerned
with shallow inspection chambers up to an invert depth
of 1800mm .
The manhole space required for a man to work within
the inspection chamber
-
7/30/2019 Drainage syesterm
10/17
INSPECTION CHAMBERS
-
7/30/2019 Drainage syesterm
11/17
-
7/30/2019 Drainage syesterm
12/17
-
7/30/2019 Drainage syesterm
13/17
-
7/30/2019 Drainage syesterm
14/17
RAIN WATER DRAINAGE
A rainwater drainage installation is required to collect
the discharge from roof and paved areas, and convey
it to a suitable drainage system.
A rainwater installation for a roof consists of a collectio
channel called a gutter which is connected to thevertical
rainwater pipes.
-
7/30/2019 Drainage syesterm
15/17
-
7/30/2019 Drainage syesterm
16/17
-
7/30/2019 Drainage syesterm
17/17
THE MATERIALS AVILABLE FOR DOMESTICRAINWATER
Asbestos
Galvanized steel
UPVC
Cast iron
