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Galvanized pipe is steel pipe coating with a thin layer of zinc to reduce corrosion and extend its life. Until the late 1960s, when it became clear that it should not be used in drinking water lines because it rusts from the inside out, galvanized pipe was used in homes’ water supply lines. This corrosion is caused by the chemical interaction between the pipe and water flowing through it, but is also found at points where it is connected directly to copper or brass.

Rust can contaminate drinking water and can build up to the point where it restricts water flow and reduces water pressure. Minerals in water also react with the zinc coating and form scale –this is especially true in the case of hard water. The build-up of this scale (‘tuberculation’) will eventually clog the pipe.

The appearance or growth of rust on the exterior of the galvanized steel pipe indicates that the pipe is leaking, and without remedy the pipe will further deteriorate. A one or two-piece clamp will repair a small hole; a larger hole will require replacing the entire length of the affected piece.

In cases where water flow is restricted by tuberculation, epoxy pipe lining can be a very cost-effective solution. When the affected pipes are underground water mains or where tearing out and replacing old pipes would require extensive cutting into walls, floors, etc., epoxy lining can really bring down the project’s cost. In most cases, an effective epoxy pipe lining process will fix low water pressure, and completely remove corrosion build up from pipe interiors. The epoxy lining will restore the pipe interior and prevent future deterioration.