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M/s. Technomatics Engineering Company have supplied ‘DI’ Single chamber Air Valve for Pumping pipeline of diameter 600mm under CWSS to 249 Habitation in Annur in Coimbatore District , during July 2010. After installation and commissioning of single chamber Air valve, the leakages due to column separation in the pipeline was reduced and the realization of water pumped has increased, thereby resulting in realization of more water to receiving tank and also reduction of pumping hours. The performance – DI single chamber air valve & surge Arrestor air valve is found satisfactory till now.