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Amaphampu emithonjeni ejulile ayizinto ezibalulekile embonini yamanzi yamanzi, ikakhulukazi emkhakheni wezimboni. Lawa maphampu aklanyelwe ukuhambisa ngokuphumelelayo amanzi asuka emithonjeni ejulile uye ebusweni, okwenza kube lulungele ukusetshenziswa okufana nokunisela, ukudonsa amanzi, kanye nokunikezwa kwamanzi kamasipala. Isici esisodwa esiyinhloko samaphampu emithombo ejulile ecwiliswayo yikhono lawo lokusebenzisa ngaphansi kwamanzi,