Tuesday, January 27, 2009

Can Epoxy Lining Prevent Lead Contamination from Water Pipes

By Dr. Dave Dunn

During the 19th and early 20th century lead was widely used in major U.S. cities for water pipes because of its durability and malleability. Lead pipes were eventually superseded by galvanized steel and copper, and copper pipe became the predominant material selected for domestic water service and distribution in post-World War II residential construction.

Lead contamination, caused by pipe corrosion and erosion, was the major source of lead-related health problems in the years before the health hazards of ingesting lead were fully understood. Two of the most serious health problems were stillbirth and high rates of infant mortality. Part of what did and continues to makes it so serious is that, unlike many other plumbing or pipe problems, there is no way to detect it without having your water tested. On its website, the EPA offers general information about lead contamination and how to test for it.

If you have lead in your water, it?s generally because of one (or more) of these: lead-based solder which used to be the primary way to join copper pipes, a lead service line pipe linking your house to the city or town water main, and brass (or chrome-plated brass) faucets. The U.S. Congress banned the use of lead solder containing greater than 0.2% lead in 1986. It also limited the lead composition of pipes, faucets, and all other plumbing materials to 8.0%.? As a result of this legislation, ?lead-free? brass legally can contain no more than 8% lead and plumbing installed before 1986 possibly contain higher levels of lead.

In older structures, lines from the city/town water main to the home or building may be a lead pipe . Unless your piping has been upgraded in the past 40 years, it is probably galvanized pipe which does not require lead solder for joining. Faucets should be checked to see if they are brass or chrome-plated, a licensed plumber should be able to tell you if they are. CuraFlo??s website offers a brief history of lead materials in water pipes.

Once installed, epoxy pipe lining is a barrier to prevent lead leaching from your pipes into your drinking water. The epoxy lining prevents the water going through the pipe from coming into contact with the metal of the pipe, the chemical reaction that creates pipe corrosion is prevented. Epoxy pipe lining will prevent lead and other metals (from your pipes) from getting into your water. The lining also prevents other poor water quality issues, for example: red, brown, blue or yellow water, zinc or iron leeching from galvanized pipes into your water, causing a metallic taste, and bacteria can cause terrible tasting or smelling water.

The U.S. Army Corps of Engineers (http://www.wbdg.org/ccb/ARMYCOE/PWTB/pwtb_420_49_35.pdf) and the U.S. Navy (http://stinet.dtic.mil/cgi-bin/GetTRDoc?AD=ADA327758&Location=U2&doc=GetTRDoc.pdf) have documented their use of epoxy pipe lining to prevent lead and other contaminants from leaching into drinking water.

There is no need for health concerns when it comes to epoxy lining your pipes, CuraFlo?s epoxy, CuraPoxy?, is certified to meet ANSI/NSF Standard 61 - the U.S. government standard for safe potable (drinking) water. ANSI/NSF Standard 61 certification means that something is certified safe to be used in potable water pipes at temperatures up to 180? Fahrenheit or 82.2? Celsius. CuraFlo?s epoxy pipe lining process protects you from lead (and other metals) in your pipes leaching into your water by preventing these metals from leaching into your water.

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