ʻO nā pāpaʻi multistage he mau mea hoʻokele wai holomua i hoʻolālā ʻia e hāʻawi i ka hana kiʻekiʻe ma o ka hoʻohana ʻana i nā impeller he nui i loko o ka pahu pahu hoʻokahi. Hoʻolālā ʻia nā pāpaʻi multistage e mālama pono i kahi ākea o nā noi e koi ai i nā pae kiʻekiʻe o ke kaomi, e like me ka lako wai, nā kaʻina hana ʻoihana, a me nā ʻōnaehana pale ahi.