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Backflow Preventers: 957-NRS 3

This 3 inch stainless steel reduced pressure zone assembly is designed to prevent the
reverse flow of contaminated water from being pumped or siphoned into the potable
water supply due to backsiphonage and or backpressure in accordance with national
plumbing codes and water authority requirements. This extremely compact and lighter
than a traditional designed assembly is approved for horizontal installation in accord-
ance with the direction of the flow arrow. It is ideal for protection in continuous pres-
sure piping applications and at cross-connections identified as health hazards and from
other contaminants found at the service line entrance. This assembly consists of a
stainless steel body with a quick access sleeve, torsion spring check valves, resilient
seated gate valves with non-rising stem, test cocks, and a corrosive resistant stainless
steel bottom mounted pressure relief valve.

5375 East Hunter Avenue Anaheim, CA 92807
Phone (714) 888-2444 • Fax (714) 888-2448 •
Sales@delcosales.com • www.delcosales.com