... corrosion resistance,furring resistance,increase current.The chemistry of PPR can resist chemical ionization in water,stop furring,increase ... It iis a safety healthy and green material.(That PPR pipe is not poisonous,suitable for dringing piping completely)Specification ... :1. Complete items:pipe,coupling,tee,elbow,cross.2. Size(dia):20~160mm3. Pressure grade:S5PN1.25 ...