Drinking water Discoloration: The iron and minerals in your pipes can change your drinking water brown. An easy brown stain in the vicinity of your tap is likewise an indicator of rusted pipes. Internal corrosion and rust buildup, usually attributable to a depleted zinc coating about the pipe surfaces. PVC https://www.malleableiron-pipefitting.com/industry-knowledge/how-to-connect-non-threaded-galvanized-pipes.html