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Water Distribution System Maintenance


Preventative maintenance represents a proactive approach to maintaining the water distribution system. Acts of preventative maintenance often address issues before they cause a major problem or breakdown and can result in significant cost savings. To ensure effectiveness, many preventative maintenance programs make use of GIS technology to track progress and reported problems. Below are some of the key programs that fall under this heading:

Watermain flushing

Hydrants are flowed in a controlled manner and in one direction to help remove sediment that collects in the watermains.

Hydrant maintenance

This maintenance is conducted year round and includes frost checks during the colder months of the year.

Exercising valves

Valves installed all over the water distribution system are exercised to ensure functionality and identify deficiencies. 

Life cycle maintenance

The Supervisory Control and Data Acquisition (SCADA) system equipment and station pumps undergo maintenance based on manufacturers’ specifications or as required by the regulations.

Reservoir inspections

There are three reservoir locations operated by the City of London, one on Medway Rd., one on Commissioners Rd. W., and a new reservoir on Highbury Ave. S.  The inspections are performed by contracted divers at a minimum frequency of every 5 years and coincide with the cleaning of the reservoir tanks. 

Leak detection

The enhancement of the monitoring program is currently underway. Benefits will include increased detection and reduction of non-revenue water, increased reliability of infrastructure and avoidance of failures.