Ki he extinguishing efu ʻalaminiume, ʻOku fokotuʻu atu ke fakaongo ʻa e efu momoa. Fakafaʻahinga ko e kalasi D fakaongo, ʻOku fakafeʻungaʻi pau kinautolu ki hono fakafepakiʻi ʻo e afi ukamea.
ʻI he ngaahi meʻa fekauʻaki mo e efu ʻalaminiume, ʻOku ola lelei hono fakaʻaongaʻi ʻo e kaponi taiokisaiti. Koeʻuhi ko hono density lahi ange ʻi he ʻea, ʻOku fakatupu ʻe he kaponi taiokisaiti ha ʻa vahevahe ki he ʻosikena, ʻo tokoniʻi ai ʻa e afi suppression. ʻOku mahuʻinga ke fakaʻehiʻehi mei hono fakaʻaongaʻi ʻo e vai ʻi he efu ʻalaminiume afí. Hoko ko ha ukamea mamafa, toe ngaue ʻa e efu ʻalaminiume mo e vai ʻi he mafana ʻo e ʻea, exacerbating hono tuku atu ʻo e ʻea vela mo e vave ʻa e afi, fakatuʻutamaki ʻo fakatupu ha maumau lahi ange.