ʻOku ʻikai uesia ʻe he fili ko ia ke fakalahi ʻa e ngaahi uaea ʻoku ʻi ai e conduits ʻi tuʻa ʻa e ngaahi founga maluʻi ʻo e malu ʻi he saiti. ʻI he ngaahi feituʻu ʻoku vahe ko e fakamoʻoni ki he fakaʻauha, Ko e angamaheni ke fakaʻaongaʻi armored ngaahi uaea, ʻo hao mei ai ʻa e fie maʻu ke toe ʻi ai ha conduits.
Ko e konga mahuʻinga ke fakapapauʻi ʻoku malu ʻa e pailate ʻi he feituʻu ʻoku fehokotaki ai ʻa e ngaahi uaea ki he ngaahi puha fale, fakaʻaongaʻi ʻo e keipolo keipolo kalava tafe mai. Ko ha tuʻunga moʻui mahuʻinga ke pikitai ki ai ko routing keipolo pe ʻe taha ʻi he gland takitaha, fakaʻehiʻehi mei he taʻau ʻo ha ngaahi uaea kehekehe ʻi ha foʻi poini pe ʻe taha. Hange ko e ngaahi uaea ʻi tuʻa, ʻOku ʻikai fie maʻu ke tanaki atu ʻa e conduits ʻoku ʻikai ke ʻi ai ha maumau ʻi tuʻa.