oxidized copper pipes leading down hallway

abandoned accumulation aged behavior bend blue build building bulge chemical comprimised conduit copper crystal curved decades decay decline disintegrate disuetude engineered engineering expense fix fixing formed green gross growths gunk hallway heated home hot house how hydrolysis inefficiency inefficient inspection intake interior laden leading maintain maintenance malachite materials metal mineral natural neglect neglectful not old oxidize oxidized patina pipelines pipes plumber plumbing precious properly reaction rupture seam supply ugly unsightly water weakened weathering white yourself