Body Material: Ductile Iron ASTM A536 with epoxy finish
Maximum Working Pressure: 175 PSI
Maximum Working Temperature: 140°F
Features a metered bypass for leak detection
Approved for horizontal and vertical installation
Internals: Stainless Steel, 300 Series
Certifications: ASSE 1048, CSA B64.5, AWWA C510/C550, UL, FM
Description
The Zurn Wilkins 2.5 inch Model 350DA Double Check Detector Backflow Assembly is designed for fire protection systems to prevent backsiphonage and backpressure in low health hazard applications. This ductile iron unit features a metered bypass system, allowing for efficient detection of leaks and unauthorized water use, which helps reduce maintenance costs. It includes a Wilkins Compound Check for low headloss and can be installed in both horizontal and vertical positions. Constructed with a fusion epoxy coated ductile iron body, stainless steel internals, and NORYL™ polymers, this assembly ensures reliable performance. It is certified to multiple standards including ASSE 1048, CSA B64.5, AWWA C510, and FM Approved. Item number 212-350DAL.
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Connections
This Zurn Wilkins 350DA Double Check Detector Backflow Assembly features flanged end connections.
The connections conform to AWWA C606 and ASME B16.42 Class 150 flanged bolt pattern standards.
This specific configuration is supplied less shut-off valves (L suffix), meaning separate shut-off valves would need to be installed if required.
The unit includes a gallon meter bypass (GAL MTR) for detecting water usage and leaks.
It is suitable for both horizontal and vertical installation.
The Zurn Wilkins 350DA Double Check Detector Backflow Assembly is designed for installation on water lines in fire protection systems to safeguard against backsiphonage and backpressure of polluted water in low health hazard applications.
This 2.5 inch model features a metered bypass system to efficiently detect leaks and unauthorized water use, helping to prevent unnecessary costs.
Primary Use
Protects potable water supply from contamination in low health hazard fire protection systems
Detects leaks and unauthorized water usage via a metered bypass
Key Features
Zurn Wilkins Compound Check provides low headloss and reliable performance.
Approved for both horizontal and vertical installation, offering versatile placement options.
Designed for easy maintenance with accessible check valves for service without removing the device from the line.
Construction
Main valve body and access covers are constructed from Ductile Iron ASTM A536.
Main valve body and access covers feature an NSF Approved fusion epoxy finish.
Internals and fasteners are made of Stainless Steel, 300 Series.
Elastomers include EPDM (FDA approved) and Buna Nitrile (FDA approved).
Polymers and seat ring/check valve are made of NORYL™.
Springs are constructed from Stainless Steel, 300 Series.
Specifications
Size: 2 1/2 inch
Main Valve Body Material: Ductile Iron ASTM A536
Access Cover Material: Ductile Iron ASTM A536
Coating: NSF Approved fusion epoxy finish
Internals Material: Stainless Steel, 300 Series
Fasteners Material: Stainless Steel, 300 Series
Elastomers: EPDM (FDA approved), Buna Nitrile (FDA approved)
Polymers: NORYL™
Seat Ring/Check Valve: NORYL™
Springs Material: Stainless Steel, 300 Series
Maximum Working Water Pressure: 175 PSI
Maximum Working Water Temperature: 140°F
Hydrostatic Test Pressure: 350 PSI
End Connections: AWWA C606, ASME B16.42 Class 150 (Flanged bolt pattern)
AWWA Compliant C510 (Sizes 2 1/2 inch thru 12 inch)
AWWA Compliant C550
UL® Classified (Sizes 2 1/2 inch thru 12 inch)
C-UL® Classified (Sizes 2 1/2 inch thru 12 inch)
FM® Approved (Sizes 2 1/2 inch thru 10 inch)
NYC MEA 147-99-M Vol 4 (2-1/2 inch - 10)
Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California (Sizes 2 1/2 inch thru 12 inch)
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 Double Check Detector Backflow Assembly?
This assembly is designed for installation on water lines within fire protection systems to protect against backsiphonage and backpressure of polluted water, specifically in low health hazard applications.
What materials are used in the construction of this backflow assembly?
The main valve body and access covers are made of epoxy coated Ductile Iron ASTM A536. Internals and fasteners are Stainless Steel 300 Series, while elastomers are EPDM and Buna Nitrile. Polymers and the seat ring/check valve are NORYL™.
Does this model detect leaks?
Yes, the Zurn Wilkins 350DA features a metered bypass system specifically designed to detect leaks and any unauthorized water use, helping to save on potential repair and water costs.
Can this backflow preventer be installed in any orientation?
Yes, the Zurn Wilkins 350DA Double Check Detector Backflow Assembly is approved for installation in both horizontal and vertical positions, offering flexibility for various piping configurations.
What are the key certifications for this product?
The 350DA is ASSE® Listed 1048, CSA® Certified B64.5, AWWA Compliant C510 and C550, UL® Classified, C-UL® Classified, FM® Approved, and meets NSF/ANSI/CAN 61 requirements.
