8 350 DCDA DI BODY GAL MTR, LESS GATE VALVES

Item Number: 8-350DAL
1 1
$19,685.49
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Product Type: Double Check Detector Backflow Assembly
  • Nominal Size: 8 inch
  • Maximum Working Pressure: 175 PSI
  • Maximum Working Temperature: 140°F
  • Lead Content: 0.25% Max. Weighted Average
  • Body Material: Ductile Iron ASTM A536
  • Installation: Horizontal or Vertical
  • Features a metered bypass system for leak detection

Description

The Zurn Wilkins 350DA Double Check Detector Backflow Assembly is an 8-inch device designed to protect potable water supply lines in fire protection systems from backsiphonage and backpressure in low health hazard applications. This model features a metered bypass system, which efficiently detects leaks and unauthorized water use, helping to prevent unnecessary costs. Constructed from durable ductile iron with stainless steel internals, it offers a maximum working pressure of 175 PSI and is approved for both horizontal and vertical installation. It is certified by ASSE, CSA, AWWA, UL, C-UL, FM, and meets NSF/ANSI/CAN 61 lead content requirements. This specific unit is supplied with a gallon meter bypass and without main shut-off valves.

Help Me Connect

Installation & Connections

  • This 8-inch Zurn Wilkins 350DA Double Check Detector Backflow Assembly is designed for installation on water lines in fire protection systems.
  • The main body connections conform to AWWA C606 (Grooved for steel) or ASME B16.42 (Flanged bolt pattern) standards. This specific model is supplied without shut-off gate valves, requiring the installer to provide suitable connection valves.
  • The integral bypass assembly features 3/4 inch Model 950XLD connections.
  • The unit can be installed in either a horizontal or vertical orientation.
View full details

Additional Details

The Zurn Wilkins 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 into the potable supply. This 8-inch model incorporates a metered bypass system to detect leaks and unauthorized water use.

Key Features

  • Provides protection where a potential health hazard does not exist
  • Features a Wilkins Compound Check for low headloss and improved flow characteristics
  • Bypass system efficiently detects leaks and unauthorized water use
  • Approved for both horizontal and vertical installation
  • First and second check valves are accessible for maintenance without removing the device from the line

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, NORYL™
  • Fasteners: Stainless Steel 300 Series
  • Elastomers: EPDM (FDA approved), Buna Nitrile (FDA approved)
  • Polymers: NORYL™
  • Springs: Stainless Steel 300 Series

Specifications

General Specifications

  • Product Type: Double Check Detector Backflow Assembly
  • Model: 350DA
  • Nominal Size: 8 inch
  • Detector By-Pass Assembly: 3/4 inch Model 950XLD
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140°F
  • Hydrostatic Test Pressure: 350 PSI
  • End Connections: AWWA C606 (Grooved for steel), ASME B16.42 (Flanged bolt pattern)
  • Lead Content: 0.25% Max. Weighted Average
  • Installation Orientation: Horizontal or Vertical
  • Included Options: Gallon Meter, Less Shut-Off 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, NORYL™
  • Fasteners: Stainless Steel 300 Series
  • Elastomers: EPDM (FDA approved), Buna Nitrile (FDA approved)
  • Polymers: NORYL™
  • Springs: Stainless Steel 300 Series

Certificates & Approvals

  • ASSE® Listed 1048
  • CSA® Certified B64.5
  • AWWA Compliant C510
  • AWWA Compliant C550
  • UL® Classified
  • C-UL® Classified
  • FM® Approved
  • NYC MEA 147-99-M Vol 4
  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • Meets NSF/ANSI/CAN 61 Requirements

FAQs

What is the primary purpose of the Zurn Wilkins 350DA Double Check Detector Backflow Assembly?

Its primary purpose is to protect potable water systems in fire protection applications from pollution caused by backsiphonage and backpressure in low health hazard situations. It also detects leaks and unauthorized water usage via its metered bypass.

What are the main body and internal materials of the 8-inch 350DA?

The main valve body and access covers are made of Ductile Iron ASTM A536 with an NSF approved fusion epoxy finish. Internals, fasteners, and springs are Stainless Steel 300 Series, while polymers are NORYL™ and elastomers are EPDM and Buna Nitrile.

Can the Zurn Wilkins 350DA be installed vertically or horizontally?

Yes, the Zurn Wilkins 350DA Double Check Detector Backflow Assembly is approved for both horizontal and vertical installation, offering versatility in placement.

What is the maximum working pressure and temperature for this backflow assembly?

The 8-inch Zurn Wilkins 350DA has a maximum working water pressure of 175 PSI and a maximum working water temperature of 140°F.

Does this 8-inch 350DA model come with shut-off valves?

No, this specific model (SKU 8-350DAL) is supplied without shut-off gate valves, meaning suitable connection valves will need to be provided by the installer.

Related Products

1 2