Tu'u puipui tasi: PVC o le mea autu mata, lea e faia e extrusion blow molding.Ose oloa na fausia ile 1970s.O totonu ma fafo luga ole paipa corrugated tasi-puipui e corrugated.Talu ai o le pu o le oloa palasitika corrugated paipa o loʻo i totonu o le ala ma e elongated, e manumalo lelei le drawbacks o oloa mafolafola mafolafola perforated e faigofie ona poloka ma afaina ai le aafiaga o alavai.O le fausaga e talafeagai, ina ia lava le compressive ma le aʻafiaga o le paipa.