"I-GRO" Grey Pipes made under this Indian Standard are used for discharging of soil waste and rain water from buildings. These pipes along-with molded fittings which are specially made to fit with these pipes form a critical part of all kinds of buildings which are being constructed nowadays. These pipes have "O" Ring type sockets on their ends to self-fit with another pipe with the help of an "O" Ring which works as a sealing ring. They form a complete sanitary discharge system of a modern building. As the pipes are very light, their installation is very easy.