Outer layer ppr material contained carbon black with high uv-resistance, inner layer is ppr material with anti microbial compound & middle with pure ppr ; except for all advantages of common pp-r pipe, it can fully dispel the ultraviolet ray with service life of over 50 years under the stipulated condition outside.

Outer layer ppr material contained carbon black with high uv-resistance, inner layer is ppr material with anti microbial compound & middle with pure ppr ; except for all advantages of common pp-r pipe, it can fully dispel the ultraviolet ray with service life of over 50 years under the stipulated condition outside.