He potae piihi, e mohiotia ana hoki he upoko, he plu, he putorino, he putorino e uru ana ki te miro o waho o te paipa. Kei te whakamahia te kati ki te kati i te putorino, ko te mahi he rite ki te molo putorino. Ko nga potae kowiri tira he mea kowiri tira. Ko te putorino HT he kaiwhakarato kowiri tira kowiri tira, te kaihaka, te kaihoroi, te wheketere me te kamupene i Haina 304 te nuinga o nga potae maitai.