Depends on volume of water ...
Published by Chandrasekaran J., Founder Director at Watsan Envirotech private Limited
Depends on volume of water used and also the nature of water. Mostly recommended are UPVC called as unplasticized PVC or for larger volumes and long run, HDPE (High Density Polyethylene) black pipes, which have better environmental stress cracking resistance (ESCR) and UV stability.