Kata kandi ugorore umuyoboro w'umuringa ukoresheje Hairpin Bender na Tube Cutting Machine, hanyuma ukoreshe umurongo wo gukanda kugira ngo utobore agapapuro ka aluminiyumu mu mababa. Hanyuma shyiramo umuyoboro, ureke umuyoboro w'umuringa unyure mu mwobo w'amababa, hanyuma wagure umuyoboro kugira ngo byombi bifatanye neza ukoresheje expander ihagaze cyangwa expander itambitse. Hanyuma uhambire aho umuyoboro w'umuringa uhurira, kanda kugira ngo urebe niba hari aho amazi yamenetse, uteranye agasanduku, hanyuma upakire nyuma yo gusuzuma ubuziranenge.