End Connections: Flanged (AWWA C606.42 Class 150) or Grooved
Approvals: ASSE 1048, CSA B64.5, AWWA C510, UL Classified, FM Approved
Installation: Horizontal or Vertical
Bypass: Metered for leak detection
Description
The Zurn Wilkins 350DA Double Check Detector Backflow Assembly is a 3-inch ductile iron unit designed for low health hazard fire protection applications. It safeguards against backsiphonage and backpressure, featuring a metered bypass system to detect leaks and unauthorized water use, thereby minimizing operational costs. With a robust ductile iron body and stainless steel internals, it offers reliable performance. This model, configured without main shut-off gate valves, is approved for both horizontal and vertical installation and meets ASSE 1048, CSA B64.5, AWWA C510, UL, and FM standards. Item number 3-350DAL.
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Connections
The 3-inch Zurn Wilkins 350DA backflow assembly is designed with end connections that can be configured as flanged (AWWA C606.42 Class 150 bolt pattern) or grooved (for steel piping).
This model is supplied without main shut-off gate valves, allowing for customization with separately sourced gate valves or direct integration into existing systems where shut-off valves are not required at the assembly.
The integral bypass assembly utilizes a Model 950XLD bypass.
The Zurn Wilkins 350DA Double Check Detector Backflow Assembly with a 3-inch ductile iron body protects against backsiphonage and backpressure in low health hazard fire protection systems. This model features a metered bypass system to efficiently detect leaks and prevent unauthorized water use, helping to reduce maintenance costs.
Key Features
Equipped with a Zurn Wilkins Compound Check for reliable performance and improved flow characteristics.
Approved for installation in both horizontal and vertical positions, offering versatile placement options.
Designed to detect leaks and unauthorized water use, contributing to lower operational costs.
This configuration comes less main shut-off gate valves.
Construction Materials
Main Valve Body: Ductile Iron ASTM A536
Access Covers: Ductile Iron ASTM A536
Coatings: NSF Approved fusion epoxy finish
Internals: Stainless Steel, 300 Series and NORLYL™
Fasteners: Stainless Steel, 300 Series
Elastomers: EPDM (FDA approved) and Buna nitrile (FDA approved)
End Connections: Flanged (AWWA C606.42 Class 150 bolt pattern) or Grooved (for steel)
Configuration: Less Main Shut-off Gate Valves
Bypass Assembly: Model 950XLD (By-Pass Backflow Assembly)
Dimensions (Approximate)
Overall Length (A): 31 inch (787 mm)
Centerline to Top (C): 15 7/8 inch (403 mm)
Width (D): 3 3/4 inch (95 mm)
Flange Diameter (F): 7 1/4 inch (184 mm)
Flange Diameter (G): 7 1/4 inch (184 mm)
Weight: 180 lbs (82 kg)
Certificates & Approvals
ASSE® Listed 1048 (Sizes 2 1/2" thru 12")
CSA B64.5 Certified (Sizes 2 1/2" thru 12")
AWWA Compliant C510 (Sizes 2 1/2" thru 12") and C550
UL® Classified (Sizes 2 1/2" thru 12")
FM® Approved (Sizes 2 1/2" thru 10")
NYC MEA 277-99-M Vol (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")
Meets the requirements of NSF/ANSI/CAN 61* (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)
FAQs
What is the primary application of the Zurn Wilkins 350DA backflow assembly?
The Zurn Wilkins 350DA is primarily used in low health hazard fire protection systems to protect against backsiphonage and backpressure.
What type of connections does this 3-inch 350DA model feature?
This model is available with flanged end connections (AWWA C606.42 Class 150 bolt pattern) or grooved end connections, suitable for steel piping systems.
Does this Zurn Wilkins 350DA come with shut-off gate valves?
No, this specific configuration is supplied "less main shut-off gate valves," meaning the main line valves are not included and must be sourced separately if required.
Can the 350DA backflow assembly be installed in any position?
Yes, the Zurn Wilkins 350DA Double Check Detector Backflow Assembly is approved for both horizontal and vertical installation, offering flexibility for various piping layouts.
What is the maximum operating pressure and temperature for this backflow preventer?
The Zurn Wilkins 350DA has a maximum working water pressure of 175 PSI and a maximum working water temperature of 140°F.
