... ground source. HD PE Eccentric Reducer Black HDPE pipe is good for anti-UV, anti-aging, anti-corrosion.The useful ... tube,can choose a caliber smaller than the steel tube.Good health performance,no additives,no possibility of contamination of ... .• lightweight,easy to install,transport,connection,sonstruction convenientand reliable.• Good flexibility,small tube can be winding,pipe can be meandering along ...