... High temprature resistance 3. Low thermal conductivit Polypropylene pipe for hot water supply Adopt the most advanced ... -0.92g/cubic centimeter, the weight of PPR pipe is just 1/9 of that of steel ... during installation.2) Healthy and non toxicPPR pipe is green product, non toxic and pollution free ... and enviroment-friendlyNo pollution in the process of pipe’s production, installation, usage and the waste ...