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Monthly Archives: December 2011

Repair Procedures

Listed below are the manufacturers repair manuals for the most popular backflow assemblies: All files are downloadable PDF.

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Lead Free on the Horizon

In January of 2011, the Congress of the United States amended the safe Drinking Water Act, adding the requirement that the federal definition of “lead free” in backflow devices to be less than or equal to 0.25 percent. Laws are being enacted across the country requiring a lower lead percentages in backflow assemblies. If you […]

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Above Ground Vaults

Although this is the appropriate use of vaults, this too can cause a potential cross connection if the drain becomes clogged.

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Underground Vaults

This is an example of why the installation of RPZ backflow assemblies in  underground vaults is now illegal in Maryland. The pit has flooded and should the relief vent open while submerged a serious cross connection would occur.

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