Ko te kaupapa mahi o te mita wai miihini e ahu mai ana i te pānga waiora: ina rere te wai i roto i te nekehanga o te mita, ka akiaki i te impeller kia huri. Ko te tere hurihuri o te impeller he rite tonu ki te tere rere o te wai (ā, nō reira ko te tere rere inamata). Kātahi ka tukuna tēnei nekehanga hurihuri, ka whakaroahia mā te tereina taputapu tika, ka huri i te maha o ngā hurihanga impeller ki te rōrahi wai whakaemi. Hei whakamutunga, ka whakaaturia tika te rōrahi whakaemi mā roto i ngā tohu, i ngā wira mati rānei hei pānui, ka tutuki ai te ine tau o te wai e pau ana.
Wā tuku: Whiringa-ā-rangi 18-2025