Donsen e thehiloe ka 1996, e leng NINGBO moo e leng toropo e tswetseng pele le e ntle ya kou ya matjhaba. Kaha re na le boiphihlelo ba dilemo tse fetang 20 tshimong ena, re e mong wa bahlahisi ba profeshenale ka ho fetisisa ba ikgethileng ho hlahiseng diphaephe tsa polasetiki bakeng sa phepelo ya metsi le tsamaiso ya nosetso.

Lihlahisoa tsa rona tse ka sehloohong ke liphaephe le lisebelisoa tsa PP-R, lisebelisoa tsa khatello ea PP, liphaephe le lisebelisoa tsa C-PVC, liphaephe le lisebelisoa tsa U-PVC, liphaephe le lisebelisoa tsa PE, liphaephe tsa ho futhumatsa fatše tsa PE-RT, liforomo tsa polasetiki le mefuta eohle ea li-valve tsa polasetiki. Mohlala: valve ea PVC, valve ea PPR, valve ea C-PVC, valve ea BRASS.