Ko ngā rorohiko mō te whakamāhi i ngā wai i runga i te tāwhai he ara mātauranga hei whakamāhi i ngā wai i ngā whare pūtaiao. Ko ngā rorohiko nei e āwhina ana i ngā kairangahau me ngā kairangahau kia mahi ake i a rātou i te wā iti ake me te whāinga pai ake. Whakaarohia anō te uara o ngā moni i whakamāhinga i te wā o ngā hararei hōu kia pour, kia mix, kia measure ngā wai kāore i te whakawhetai. Ko tēnei hanga he matua mō ngā whare pūtaiao nā te mea he whakamāmā i te wā me te whakamāngaro i ngā hapa. Ko tā tātou kamupene, ko ZONWON, te whakamāhinga o ēnei. Te Whakahaere Rerenga ngā māhine hei whakamārama i te whananga kia pai ake. Ko ā mātou rākau hei whakamārama i ngā kairangahau kia whai wā nui ake hei whakamātautau, ā, he iti ake ngā mahi māmā. Ko te whāinga o tēnei mō ngā kamupani e whakamahi ana i te whakamārama i ngā wāhi hikoheke he pai ake ngā putanga, ā, he nui ake ngā whakamātautau.