Leli valvu eliwuchungechunge lisetshenziswa kabanzi emipayipini yokuphakelwa kwamanzi kanye neyokukhipha amanzi ekwakhiweni, amakhemikhali, ezemithi, ekwakhiweni kwemikhumbi kanye neminye imboni njengedivayisi yokuvula nokulawula, ngenzuzo yokuvala okuqondiswayo nokugcina isikhala. Zizwe ukhululekile ukuxhumana nathi ukuze wenze ngokwezifiso ivalvu yephrojekthi yakho.