Ko te whakamahana paipa he mea tito he whakamahana rumaki kua hipokina e te ruuma oko konganuku anti-corrosion.Kei te whakamahia te nuinga o tenei casing mo te whakamaarama hei aukati i te mate wera i roto i te punaha tohanga.Ko te mate wera ehara i te mea karekau noa i runga i te whakamahinga o te hiko engari ka kore e tika nga whakapaunga whakahaere.