Umbhobho wentsimbi yentsimbi ye-PVC inokohlulwa ibe yimigangatho yemizi-mveliso (ingakumbi ehambisa amanzi amashishini, i-oyile, umgubo welindle, izinto ezikrwada iikhemikhali, njl.njl.) kunye nebakala lokutya (imveliso yokutya ehambisa ijusi, ubisi, amanzi atyiwayo, i-winery yokuhambisa) utywala, ibhiya njl. , ukuveliswa kwamandla omoya, ukufunxa kunye nokukhupha amanzi, iimveliso ze-oyile, iikhemikhali ezinobunzulu obuphantsi kunye nolunye ulwelo kunye namasuntswana aqinileyo kunye nemathiriyeli engumgubo.