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Backflow Preventers: 757DCDA
Series 757DCDA, 757NDCDA Double Check Detector Assemblies prevent the
backflow of pollutants that are objectionable but not toxic, from entering into
the potable water supply. Compact housings consist of two independently
operating tri-link check valves, two shutoff valves, and four test cocks. They
feature a stainless steel housing and sleeve and are 70% lighter than tradi-
tional designs. Series 757, 757N is designed for non-health hazard applica-
tions and may be installed under continuous pressure service to protect
against both backpressure and backsiphonage. This Series is used primarily
on fire sprinkler lines when it is necessary to monitor unauthorized use of
water. Maximum Working Pressure: 175psi (12.06 bar).
5375 East Hunter Avenue Anaheim, CA 92807
Phone (714) 888-2444 • Fax (714) 888-2448 •
Sales@delcosales.com • www.delcosales.com
