If you're guilty of flushing ~hard~ tissue paper down the toilet (yes, got such thing as hard tissue paper), Vinod and his team would like to have a word with you. With more than 3,500km of public sewers forming the sewer reticulation system in Singapore, it is important that sewers are regularly maintained and cleared of chokes. Timestamps in case you wish to skip to the sections: Introduction of what our engineers do during inspection of our sewer systems (0:18). Manholes, inspection and chokes in sewer systems (2:28). Lowdown of Singapore's sewer system  (5:22).