Installation of pressure modulators on a drinking water network

SAVING WATER BY MINIMISING LEAKAGE

Today, leaks and breakage on networks generate, in some cases, heavy losses of drinking water. In order to act on these issues and following a thorough diagnosis of its installations, part of the Blaye water supply network was fitted with pressure modulators. Decreasing pressure on identified sectors reduces leakage and breakage. Hence the reduced volumes of water loss contribute to the higher goal of reducing the use of water resources.

6 pressure modulators were installed on 245 km/950 km of the Blaye drinking water supply network (nearly ¼ of the network). 5 sectors were thus identified thanks to the network diagnosis and district metering systems. Preliminary studies determined the sectors where high pressure made it necessary to install modulators.

Figure 12Figure 15

Pressure modulation enables the distribution network to function under reduced basic pressure while maintaining sufficient pressure to satisfy the water requirements of inhabitants as well as firefighters.

GIRONDE: A DEPARTEMENT COMMITTED TO LEAKAGE REDUCTION

Overall, the Gironde Département local authorities have been committed to leakage control for fifteen years or so, with very positive results. 80% of local authorities have carried out network diagnoses and 55% operate district metering systems.

A report on the transferability method, from the implementation of a testing module to the evaluation of results, can be found under ‘Production and Tools’.