Model 350DA - American Backflow Products

1 Zurn Industries, LLC | Wilkins1747 Commerce Way, Paso Robles, CA 93446 Ph. 855-663-9876, Fax 805-238-5766In Canada | Zurn Industries Limited3544 Nashua Drive, Mississauga, Ontario L4V 1L2 Ph. 905-405-8272, Fax BDate: 12/13 Document No. BF-350 DAPatent No. 5, 913, 331 Product No. Model 350 DAModel 350 DADouble Check Detector AssemblyPage 1 of 2 Model 350 DAG SHOWN ABOVEEFDEBAFDCBAO ptions(Suf! xes can be combined)c - with OS & Y gate valves (standard)c L - less shut-off valves (flanged body connections)c LM - less water meter - with remote reading meter - with gallon meter (standard)c CFM - with cu ft meterc CMM - with cu meter meterc G - with groove end gate valvesc FG - with flanged inlet gate connection and grooved outlet gate connectionc PI - with Post Indicator Gate Valve (3"-10")Accessoriesc Repair kit (rubber only)c Thermal expansion tank ( Model XT)c OS & Y Gate valve tamper switch (OSY-40)Dimensions & Weights (do not include pkg.)

2 ApplicationDesigned for installation on water lines in fire protection systems to protect against both backsiphonage and backpressure of polluted water into the potable water supply. Model 350DA shall provide protection where a potential health hazard does not exist. Incorporates metered by-pass to detect leaks and unauthorized water Compliance (Sizes 2 1/2" - 10" Horiz. & Vert.) (12" Horizontal Only) ASSE Listed 1048 (Sizes 2 1/2" thru 12") CSA Certified (Sizes 2 1/2" thru 8", & 12") AWWA Compliant C510 (Sizes 2 1/2" thru 12"), and C550 UL Classified (Sizes 2 1/2" thru 12") C-UL Classified (Sizes 2 1/2" thru 12") FM Approved (Sizes 2 1/2" thru 10") NYC MEA 147-99-M Vol 4 (2-1/2" - 10) Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California (Sizes 2 1/2" thru 12") NSF Listed-Standard 61, Annex G* *( MAX. WEIGHTED AVERAGE LEAD CONTENT)MaterialsMain valve body Ductile Iron ASTM A 536 Grade 4 Access covers Ductile Iron ASTM A 536 Grade 4 Coatings FDA Approved fusion epoxy finishInternals Stainless steel, 300 Series NORYL , NSF ListedFasteners Stainless Steel, 300 SeriesElastomers EPDM (FDA approved) Buna Nitrile (FDA approved)Polymers NORYL , NSF ListedSprings Stainless Steel, 300 SeriesFeaturesSizes: 2 1/2", 3", 4", 6", 8", 10", 12"Maximum working water pressure 175 PSIM aximum working water temperature 140 FHydrostatic test pressure 350 PSIEnd connections (Grooved for steel) AWWA C606 (Flanged) ANSI Class 125 Attention: Model 350DA (flange body) and Model 350 ADA (grooved body) have different lay lengths.

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4 "#$%&'()*%&%+%*,+(,-+,&.+)-%+-/012345678 9:;<=>?@@A>?BC@@DEFGHT ypical InstallationLocal codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted at a minimum of 12" (305mm) and a maximum of 30" (762mm) above adequate drains with sufficient side clearance for test-ing and maintenance. The installation shall be made so that no part of the unit can be ! cationsThe Double Check Detector Backflow Prevention Assembly shall be ASSE Listed 1048, and supplied with full port gate valves. The main body and access cover shall be epoxy coated ductile iron (ASTM A 536 Grade 4), the seat ring and check valve shall be Noryl (NSF Listed), the stem shall be stainless steel (ASTM A 276) and the seat disc elastomers shall be EPDM. The first and second check valves shall be accessible for maintenance without removing the device from the line. The Double Check Detector Backflow Prevention Assembly shall be a WILKINS Model INSTALLATIONVERTICAL INSTALLATIONIJKJLMNONPQRSLPTURVTWXYMKTZ[ Y\]YMKT^M_T`aNb^TLcd`aNb^TLeXaNb^TLe`aNb ^TLfebfgc`eefeWhffWigee`ecifiXiWjWgehkfh kihc`h`jgW`Xjc`hXXei`ekgckXeejhe``hfiihe XgeffhekWifW`kijkcefgecjifjWWi`f``fkklmn opqqrrslqnomtqrrsunoltqrrsvnomqqrrswnolq qrrsmlxmnoutrrspnovqrrsPROTECTIVEENCLOSU RE12" " OF FLOWDIRECTION OF FLOW