Mō ngā waea me ngā taura iti-ngaohiko, e rua ngā wāhanga matua e ai ki tā rātou kaupapa: ngā waea hanga me ngā waea taputapu hiko. I roto i te waea hanga, he waea rapa maori kua pania ki te uku i te tekau tau atu i 1960. Mai i te tekau tau atu i 1970, kua whakakapia katoatia e ngā waea kirihou PVC. He rite te āhua o ngā raina taputapu hiko ki tērā o ngā raina hanga, i te tuatahi ko te rapa maori te nuinga, engari i te tekau tau atu i 1970 i whakakapia nuitia e ngā taura PVC. He kore pūtaiao tēnei āhua, ā, he koretake hoki mō te umanga taura me ngā whiringa a ngā kaiwhakamahi. I ēnei rā, me whakarerekē ngā taura taputapu hiko, inā koa ko ngā taura hono e hiahiatia ana mō ngā taputapu whare e puāwai ana, i te āhua o nāianei ko te kirihou PVC te nuinga, me whakakapi ki ngā taura rapa. Nā te mea he painga ahurei ngā taura rapa pērā i te ngawari, te pai o te ringa, te kore wehi i te wera, me te kore e rewa, kāore e taea te whakarite ki ngā taura kirihou. Nā te maha o ngā painga kāore i te rapa hangai, ka taea te whakamahi whānui i te CPE i roto i te hanga taura hiko whare me ētahi atu taura ngāwari mō ngā taputapu hiko. He whānui ngā āhuatanga hangarau o te CPE, pērā i te ātete mura me te ātete hinu teitei, ngā āhuatanga ā-tinana me ngā āhuatanga miihini (arā, ngā āhuatanga miihini), te ātete wera pai, te ātete ozone, te ātete āhuarangi, ngā āhuatanga hiko pai, me te mahi tukatuka pai. Ka taea te whakamahi i roto i ngā taputapu tukatuka rapa whānui, ā, kāore te rauemi rapa e ngawari ki te wera. Kāore ngā rauemi mata CPE e pirau i muri i ētahi tau o te rokiroki. Ka taea te penapena i ngā rauemi rapa me ngā matū whakamomona mō te 1-2 tau me te kore e pirau i raro i ngā tikanga rokiroki pai ake.
Hei whakarāpopototanga, ko te whakamahinga o te CPE i roto i te umanga taura ipurangi, arā, te whakakapi i te CR ki te CPE, he ia o ngā mahi i roto i te umanga taura ipurangi. Ehara i te mea ka whakaiti noa i te taupatupatu i waenganui i te tuku me te tono o te CR, ka whakaiti nui hoki i te utu o ngā hua taura, ka whakapai ake i ngā painga ōhanga o te umanga taura, engari he mea nui anō hoki ki te whakapai ake i te kounga o ngā hua taura me te whakatutuki i te kanorau o ngā momo taura.
Wā tuku: Whiringa-ā-rangi-06-2023
