Yenziwe ngeyona ntsimbi igqwesileyo engama-304, ayinakuqinisekisa ukuba akukho mhlwa, ayiyi kuvelisa izinto ezingcolisayo,
aziyi kuvalelwa, zibe nobomi obude benkonzo, aziyi kuvalelwa yintlenga.
Umgaqo
1. Insimbi engenasici, i-anti-corrosion, inikezela ngamanzi acocekileyo.
2. Ukupakishwa komntu ngamnye okanye ukupakisha isambuku kwamkelekile.
3. Uyilo lulungele iihagu kunye nokuhanjiswa kwamanzi ococeko.
4. Isihluzo seplastiki esilungelelanisiweyo kulula ukutshintsha iinkqubo zamanzi ezinoxinzelelo oluphezulu kunye neenkqubo zamanzi eziphantsi.