10 350 DCDA DI BODY GAL MTR, LESS GATE VALVES
Item Number: 10-350DALBrand - Wilkins
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- Nominal Size: 10 inch
- Assembly Type: Double Check Detector Backflow Preventer
- Body Material: Ductile Iron ASTM A536
- Maximum Working Pressure: 175 PSI
- End Connections: Flanged Bolt Pattern
- Includes Gallon Meter for leak detection
- Designed for horizontal or vertical installation
- ASSE® Listed 1048, CSA® Certified B64.5, FM® Approved
Description
Description
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The Zurn Wilkins Model 350DA backflow assembly offers versatility for installation in both horizontal and vertical positions.
Installation Guidelines
- Local codes govern all installation requirements.
- Minimum Mounting Height: 12 inches (305mm) above adequate drains.
- Maximum Mounting Height: 30 inches (762mm) above adequate drains.
- Ensure sufficient side clearance for testing and maintenance.
- The unit must be installed so no part can be submerged.

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Additional Details
The Zurn Wilkins Model 350DA Double Check Detector Backflow Assembly is designed for installation on water lines in fire protection systems to protect against backsiphonage and backpressure of polluted water.
This 10-inch model features a metered bypass system to detect leaks and unauthorized water use, providing protection where a potential health hazard does not exist. It incorporates the Zurn Wilkins Compound Check for low headloss and reliable performance.
Key Features
- Protects against backsiphonage and backpressure in low health hazard applications.
- Metered bypass system efficiently detects leaks and unauthorized water use.
- Features the Zurn Wilkins Compound Check for reliable performance and low headloss.
- Approved for both horizontal and vertical installation.
- Durable ductile iron body for long-lasting performance.
Specifications
General
- Model: 350DA
- Assembly Type: Double Check Detector Backflow Preventer
- Nominal Size: 10 inch
- Installation: Horizontal or Vertical
Materials
- Main Valve Body: Ductile Iron ASTM A536
- Access Covers: Ductile Iron ASTM A 536
- Coatings: NSF Approved Fusion Epoxy Finish
- Internals: Stainless Steel, 300 Series, NORYL™
- Fasteners: Stainless Steel, 300 Series
- Elastomers: EPDM (FDA approved), Buna Nitrile (FDA approved)
- Polymers: NORYL™
- Springs: Stainless Steel, 300 Series
Performance
- Maximum Working Water Pressure: 175 PSI
- Maximum Working Water Temperature: 140°F
- Hydrostatic Test Pressure: 350 PSI
Connections
- End Connections: Flanged Bolt Pattern
- Bypass Meter: Includes Gallon Meter (Standard)
- Shut-Off Valves: Less Shut-Off Valves (Flanged Body Connections)
Physical Characteristics
- Approximate Weight (Less Shut-Off): 404 lbs
Certificates & Approvals
- ASSE® Listed: 1048 (2 1/2" thru 12")
- CSA® Certified: B64.5 (2 1/2" thru 8", & 12")
- AWWA Compliant: C510 (2 1/2" thru 12"), C550
- UL® Classified: (2 1/2" thru 12")
- C-UL® Classified: (2 1/2" thru 12")
- FM® Approved: (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 (2 1/2" thru 12")
- Meets NSF/ANSI/CAN 61 Requirements (0.25% Max. Weighted Average Lead Content)