This document discusses key aspects of water supply system maintenance including: 1) Maintenance of infrastructure like pipes, pumps, and valves which typically require replacement, repair, or cleaning every 5-15 years depending on the material and usage. 2) Detecting and addressing leaks through periodic inspections, random checks, and repairing small leaks in pipes, valves, or fittings. 3) Managing water quality through cleaning of sources and tanks, disinfection to remove bacteria and viruses, and protecting sources from pollution.

1. By
Er. Aby M Mundackal (M. tech)
Manager (Technical) , KRWSA
Ph +91 9496480150

2. Introduction
Maintenance of
Scheme,
Complaint
Redressal
Mechanism
 Water Quality
Management.
Water Source
Structure
Mechanical Part
System

3. SystemSafeSource–
sustainable
Maintenance
Quality
Water
Structure
Quantity
Demand &
Supply
 Surrounding Site Cleaning
Maintenance of Structures – Cleaning, Painting,
Plastering etc.

4. Impotence of Water Level

5. ProposalsforEstimate ofMaintenance in
WaterSupplyComponents
Cost EstimatePractical DurabilityComponents
Pipes – Pumping main
& Distribution
Duration of GI pipes 5
to 15 years , based on
the Pressure of the
Pipe line
Replacement
Required with in
10years (100% cost)
Leak rectification
including welding etc
(30% of laying cost )
PVC pipe – More
durable , maintenance
may be required in
high pressure areas
More specials and
jointing cost required
(20%-50% Cost)
Pump &
Electrical Items 8 to 12 years durable
based on the duration
of pumping, head,
power, demand etc
Valves &Water
Meter ExpertTechnicians -
maintenance required
every 2years
5 to 10 years durable
based on the site
condition and usage

6. Pipelineleaks
Visible from ground
Not visible from ground
Apparent effects of pipe leak
1)Water spots/flow on the ground
2)Water quality deterioration
3)Water shortage
4)Decrease in water pressure
5)Turbid water in the beginning
of flow and subsequent
improvement in water quality

7. LeakDetectionInWaterSupplySystems
Manual methods for leak
detection
 Walking ,driving, and noticing
Simple method that can be used
for small water supply schemes
Mechanised methods

8. Leakdetection-principles
F1 V1 F2
Vin Vout
leak=Vin- Vout-V1 V1= water consumption in the line

9. IssuesSolvingTechniques
“Prevention is Better than Cure”
Periodical
Inspection in the
pipe line area
• PumpingTime
• Unexpected
Random Check
Rectify Small
Leak
• AirValve Ball
Changing
• GI pipe Leak
• Valve Gland Packing
Leak
Periodical
Cleaning
• Tank, Source
• Scouring Pipes

11. POTABLEWATER QUALITY??
Determined by Physical, chemical
and biological characteristics of
water
Limiting values/ requirements of
these characteristics are explicitly
stated in standards
There are many National and
International standards on this
viz.,WHO standards, BIS
National standard is the one that we
follow and it is BIS 10500

12. WaterPollutionResultsinto
Changes the physical nature of
water, colour, odour, taste
Increase the chemical contents in
water - Fluoride, Iron, Chloride,
Nitrate etc.
Bacterial contamination and
presence of organic matter
The above mentioned are the
measuring scale of water quality

13. StepsToProtectWaterSourcesFrom
Pollution
Effective management of all wastes
including human excreta, solid and liquid
waste
Formulation ,implementation, and periodic
updating of legislation for waste
management
Accomplishing peoples co- operation in all
sorts of activities for waste management

14. WHYDISINFECTION?
To Remove
•Harmful Pathogenic
Bacteria
•Viruses
To Avoid
Transmission of water
born diseases

15. ToPrevent
 Contamination of
water in the
distribution network
Disinfectant
Chlorine and
Bleaching Powder