ʻIke ʻia i ka makahiki 1900, ʻo Zurn ka mea hana nui o ka honua i nā valves, nā huahana paipu a me nā huahana ʻoihana ʻē aʻe. Ua kūpaʻa ʻo Zurn i ka hoʻoponopono ʻana i ka wai a me ka wai wai no nā mea ʻaelike, nā mea hale a me nā mea hoʻohana hope. Loaʻa iā Zurn nā kikowaena hana a me nā kikowaena hoʻolaha a puni ka honua, hiki ke hāʻawi i nā lawelawe wikiwiki a maikaʻi i nā mea kūʻai aku o ʻAmelika ʻAmelika.

Ua hoʻokumu ʻia ʻo Oatey ma 1916. No ka aneane 100+ mau makahiki, ua hoʻolako ʻo Oatey i nā valves hilinaʻi a kiʻekiʻe, nā paipu a me nā mea pono no nā hale noho, ʻoihana a me nā ʻoihana. Ua kūpaʻa ʻo Oatey i ka hoʻomaikaʻi ʻana a me ka hoʻomaikaʻi ʻana i ka nohona o nā kānaka ma o nā huahana a me nā lawelawe ʻoihana. Loaʻa iā Oatey kahi ʻōnaehana hoʻolaha piha e hāʻawi i nā hoʻonā ʻoihana no nā mea hana ʻaelike, nā mea kūkulu hale a me nā ʻenekinia ma nā ʻoihana like ʻole.

Ua hoʻokumu ʻia ʻo Viega i ka makahiki 1899 a ʻo ia ke keʻena nui ma Kelemānia. I kēia manawa, hana ʻia nā huahana a Viega ma 6 mau wahi honua a hoʻolaha ʻia a puni ka honua. Loaʻa iā Viega kahi hui ʻenehana loea, lawelawe i ka lawelawe e hāʻawi i nā hoʻonā i hana ʻia no nā ʻenekinia, nā mea hoʻolālā a me nā mea hoʻolaha. Mai ka ʻike huahana a hiki i ke kākoʻo ma hope o ke kūʻai aku, e lawe nui ka hui Viega iā ia.

Ua hoʻokumu ʻia ʻo Apollo Valves i ka makahiki 1975 a he ʻāpana o ka Aalberts Group. Manaʻo ʻo Aalberts i ka hāʻawi ʻana i nā mea kūʻai aku me nā ʻōnaehana paipu hoʻohui, nā huahana ʻenehana a me nā mea pono e kōkua i nā mea kūʻai aku e hoʻopau i kā lākou hana maʻalahi a me ka maikaʻi.
ʻO nā huahana ʻo Apollo Valves nā kīpē kinipōpō keleawe, nā kiwi pōpō kila kila, nā kiwi pōpō kila kalapona a pēlā aku.

No nā makahiki he nui, ua hāʻawi ʻo Neles i nā ʻenehana loea a me nā ʻōnaehana automation no ka ʻaila a me ke kinoea, ka pepa a me ka pulp, ka biology, ka lāʻau lapaʻau a me nā ʻoihana meaʻai. Loaʻa iā Neles 2950 mau loea loea i loaʻa ka ʻike huahana ikaika a me ka ʻike ʻoihana e kōkua i nā mea kūʻai aku e hoʻopau i kā lākou hana me ka hilinaʻi a me ka maikaʻi.