
The famous red building of Kilpauk and its forgotten ...
22/08/2018 · The purifiion technology that was in use till as late as 2000, was the ageold one, using fine sand, pebbles and bricks. As demand increased, this system was replaced by one that used chemicals along with rapid sand filter technology. A 177ft chimney stands tall near the sand filter structure. This chimney was used to let out the smoke that ...