Isikhwama samanzi esiguquguqukayo senziwe ngendwangu ye-PVC eguquguqukayo, inokusebenza okuhle kakhulu okungangeni manzi, futhi isetshenziswa kabanzi ezimbonini eziningi zokugcina amanzi noma ezinye izinto eziwuketshezi, njengokuqoqa amanzi emvula, ukugcina amanzi okuphuza, ukulayisha isikhwama samanzi sokuhlola ibhuloho, ipulatifomu, kanye nomzila wesitimela, njalonjalo.
