If your home was built decades ago, chances are that your plumbing system includes galvanized pipes. A common problem with galvanized pipes is that they rust over time and may start leaking sooner or later. Galvanization is a process of coating the steel piping with a thin layer of zinc to create a barrier between the water and steel. Over time, this barrier tends to wear out and exposes steel surface to water, thus causing corrosion.
One of the major disadvantages of galvanized pipes is that calcium in water tends to build up on the inner surface on the pipes, slowly clogging it until the point where water can no longer flow though it. PEX pipe, on the other hand, is not subject to calcium buildup problem. Galvanized steel pipes also face a problem of galvanic or electrolytic corrosion, caused by dissimilarities in conjoined metals. Wherever steel pipe meets copper, the steel will rapidly corrode if a dielectric union isn’t used.Replacing Galvanized Pipes with PEX Tubing