A yanka kuma a lanƙwasa bututun tagulla ta hanyar amfani da Hairpin Bender da Tube Cutting Machine, sannan a yi amfani da layin matse fin don a huda foil ɗin aluminum zuwa fin. Na gaba, a zare bututun, a bar bututun tagulla ya ratsa ramin fin, sannan a faɗaɗa bututun don ya dace da su ta hanyar faɗaɗawa a tsaye ko kuma mai faɗaɗawa a kwance. Sannan a haɗa hanyar haɗin bututun tagulla, a danna don duba ko akwai ɗigo, a haɗa maƙallin, sannan a saka bayan an gama duba ingancin.