Ko te oko tīwiri paipa he momo taputapu e whakamahia ana mō te tukatuka rauemi paipa, e whakamahia ana i te nuinga o te wā i roto i te hanga paipa kirihou.
Ko ētahi whakamahinga o ngā oko tīwiri ngongo e whai ake nei: Ngā paipa PVC: Ka taea te whakamahi i ngā oko tīwiri ngongo hei tukatuka i ngā paipa i hangaia mai i te polyvinyl chloride (PVC), pērā i ngā paipa tuku wai, ngā paipa rerenga wai, ngā paipa hipoki waea me te taura, me ētahi atu.
Paipa PE: ka taea hoki te whakamahi i te oko tīwiri paipa hei tukatuka i ngā paipa i hangaia ki te polyethylene (PE), pērā i ngā paipa tuku wai, ngā paipa hau, ngā paipa hipoki taura whakawhitiwhiti, me ētahi atu. Paipa PP: Ka taea hoki te tukatuka i te rauemi Polypropylene (PP) hei paipa mā te oko tīwiri paipa, pērā i ngā paipa matū, ngā paipa whakapūhau, me ētahi atu.
Paipa PPR: Ka taea hoki te whakamahi i te oko tīwiri paipa hei hanga paipa hiato wera polypropylene (paipa PPR), e whakamahia ana i roto i te hanga pūnaha tuku wai me te whakamahana.
Paipa ABS: ka taea hoki e te oko tīwiri paipa te tukatuka i ngā paipa i hangaia mai i te acrylonitrile-butadiene-styrene copolymer (ABS), e whakamahia pinepine ana i roto i ngā paipa ahumahi, ngā paipa matū, me ētahi atu.
Ngā paipa PC: Ka taea hoki te tukatuka i ngā rauemi polycarbonate (PC) hei paipa mā roto i ngā oko tīwiri paipa, pērā i ngā paipa whakamakuku, ngā paipa whakapakari FRP, me ētahi atu.
Hei whakarāpopototanga, ko ngā oko tīwiri paipa e whakamahia ana i roto i te hanga paipa kirihou, ka taea te tukatuka i ngā paipa o ngā rauemi rerekē hei whakatutuki i ngā hiahia o ngā mara rerekē, tae atu ki te hanga, te ahumahi matū, te tuku wai me te rerenga wai, te hau me ētahi atu ahumahi.