Ukukhethwa kwephampu yamanzi yomthombo womculoidinga ukucabangela izici ezilandelayo:
1. Izidingo zobude nokugeleza komthombo: Khetha iphampu yamanzi efanelekile ngokusekelwe ekuphakameni nokugeleza kwezidingo zomthombo.
2. Izidingo zekhwalithi yamanzi: Uma kuwumthombo osetshenziswa ezindaweni zomphakathi, kuyadingeka ukukhetha iphampu yamanzi ehlangabezana nezindinganiso zikazwelonke ukuze kuqinisekiswe ukuphepha kwekhwalithi yamanzi.
3. Ukuqina Nokuthula: Ukukhetha iphampu yamanzi ehlala isikhathi eside futhi enomsindo omncane kungagwema ukushintshwa okuvamisile nomsindo.
4. Umnotho: Kuyadingeka ukucabangela intengo kanye nezindleko zokusebenza zephampu yamanzi bese ukhetha iphampu enezindleko eziphakeme eziphezulu.
5. Idumela Lomkhiqizo: Ukukhetha uhlobo oludumile lwepompo yamanzi kungaqinisekisa ikhwalithi yomkhiqizo kanye nesevisi yangemuva kokuthengisa.

Ngamafuphi, ukukhetha iphampu yamanzi yomthombo womculo kudinga ukucatshangelwa okuphelele kwezici ezingenhla, futhi ekugcineni ukhethe ipompo yamanzi efanelekile.