Papu para. He iti te wiri me te haruru, he iti te pikinga o te pāmahana o te motuka, ā, kāore he parahanga ki te taiao.

I. Tirohanga Whānui mō te Hua
Ko te papu para wai he momo papu e hono ana i te papu me te motuka, ā, e mahi ana i raro i te wai i te wā kotahi. Ki te whakatauritea ki ngā papu para wai whakapae, poutū rānei, he hanganga kiato te papu para wai, ā, he iti te papa. He ngāwari te tāuta me te tiaki. Ko ngā papu para wai nui he taputapu honohono aunoa, e āhei ai te tāutanga aunoa. He tino watea te tāutanga me te tiaki. He roa te wā mahi tonu. Nā te hononga o te papu me te motuka, he poto te pou, he māmā ngā wāhanga hurihuri, nō reira he iti te kawenga (radial) e wahahia ana e te peera, ā, he roa ake te ora ratonga i ērā o ngā papu noa. Kāore he kino o te cavitation, he raruraru rānei mō te whakauru me te tuku wai. He watea te whakahaere. He iti te wiri me te haruru, he iti te pikinga o te pāmahana o te motuka, ā, kāore he parahanga ki te taiao.
II. Te Whānuitanga o te Tono
He mea pai mō te whakaneke ake i te parakaingaki me ngā wai para kei roto ngā poke muka, te paru, me ētahi rahi matūriki o ngā matūriki totoka.
III. Ngā Āhuatanga o te Hua
Nā te hononga-ā-ringa o te papu me te motuka, te pou poto me ngā wāhanga hurihuri mama, he iti noa te kawenga (radial) e mau ana i te peera i runga i te peera, ā, he roa ake te ora ratonga i tērā o ngā papu noa. Kāore he kino o te cavitation, he raruraru rānei mō te whakauru me te tuku wai. He watea te whakahaere. He iti te wiri me te haruru, he iti te pikinga o te pāmahana o te motuka, ā, kāore he parahanga ki te taiao.
IV. Ngā Whakatakotoranga Hangarau Matua
Mana ≥ 300W.
Upoko ≥ 7m.
Te whānui ≥ 25mm.
Te hohonutanga o te ruku ≥ 7m.
Te tere rere ≥ 10m³/h.
Tere o te impeller: ≥ 3600 r/min.
Rahi papu: Teitei ≤ 295mm, Diameter ≤ 16mm
Taumaha ≤ 6.5kg.