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Q. "Where would I find double check backflow preventer valves?"
A. Double check valve assembly backflow preventers are often found on water lines servicing fire sprinkler systems, commercial swimming pools, water treatment tanks, to name a few. Local code will specify what items in your area requires which specific type of backflow prevention device. Always consult your local code authorities with any questions regarding backflow prevention.
Q. "What does it mean to have ANSI Certification for lead free plumbing products?"
A. Laws requiring plumbing products that come in to contact with drinking water to be essentially lead-free (0.25% weighted average) have been passed in California, Louisiana, Maryland, and Vermont. In order for companies to ship these plumbing products to locations in CA, LA, MD and VT, they must be ANSI certified lead free.
Q. "What is CA AB 1953, LA Act No. 362, MD HB 372, and VT S.152 and how is this different from previous low-lead legislation?"
A. The United States Environmental Protection Agency (EPA) regulates the amount of lead in drinking water under guidelines established in the Federal Safe Drinking Water Act (passed in 1974; amended in 1988 and 1996). This Act defines "lead-free" as not more than 8% lead in pipes and fixture fittings. PLEASE NOTE: Use of the term "lead-free" varies between the new legislation in CA (AB 1953), LA ( Act No. 362), MD (HB 372), and VT (S.152), and in the current Federal Safe Drinking Water Act requirements. In the new legislation for CA, LA, MD and VT only (as of Jan 2013), it will mean 0.25% or less (weighted average). Similar national legislation is scheduled to go into effect Jan 2014.
Q. "What does the term NRS and OSY mean?"
A.This means the inlet and outlet gate valves have a "non rising stem" (NRS) or "outside stem and yoke" (OSY). The non rising stem allows a more compact installation if there are height restrictions. For instance, installing these valve assemblies into a valve box. The outside stem and yoke gate valves rise upwards as rotated to the open position. The outside stem and yoke valves are preferred in some instance because it is easier to see from a distance if the valves are open or closed.
Q. "What is a test cock?"
A.Test Cocks are used to facilitate backflow assembly testing or as isolation valves for gauges or small equipment lines.
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