8 475 RPDA DI BODY N PATTERN GAL MTR BFLY GRV X GRV

Item Number: 8-475DABG
1 1
$48,834.24
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Size: 8 inch
  • Model: 475DABG Reduced Pressure Detector Backflow Assembly
  • Body Material: Ductile Iron ASTM A 536 Grade 4
  • End Connections: Grooved x Grooved
  • Valve Type: Galvanized Metered Butterfly with Supervisory Switches
  • Maximum Working Pressure: 175 PSI
  • Maximum Working Temperature: 140°F
  • Features Metered Bypass System

Description

The Zurn 8 inch 475DABG Reduced Pressure Detector Backflow Assembly is engineered for high hazard fire protection applications, safeguarding against backsiphonage and backpressure. This N-pattern device features grooved end galvanized metered butterfly valves with integral supervisory switches. A built-in metered bypass system actively detects leaks and unauthorized water use, enhancing system efficiency and reducing maintenance costs. Its compact design is ideal for new installations and retrofits in tight spaces. Approved by ASSE, AWWA, UL, cULus, FM, NYCFD, CSA B64.4, and NSF/ANSI/CAN 61, ensuring reliable performance. Item number 8-475DABG.

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Connections and Configuration

  • The 8 inch Zurn 475DABG is designed with grooved end connections for secure installation in fire protection systems.
  • The n-pattern design allows for installation in compact spaces, making it suitable for both new constructions and retrofit applications.
  • The integrated supervisory switches on the butterfly valves provide monitoring capabilities within the system.
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Additional Details

The Zurn 8 inch 475DABG Reduced Pressure Detector Backflow Assembly is an n-pattern design device used in high hazard fire protection applications to protect against both backsiphonage and backpressure.

This assembly features a metered bypass system to detect leaks and unauthorized water use, helping to save on repair and maintenance costs.

Key Features

  • 8 inch N-pattern design for compact spaces, ideal for new or retrofit installations.
  • Equipped with grooved end butterfly valves that include integral supervisory switches.
  • Features a metered bypass system for leak detection and monitoring unauthorized water usage.
  • Designed for high hazard fire protection systems.

Application

  • Suitable for installation in water lines in fire protection systems to guard against both backsiphonage and backpressure.
  • Ensures uninterrupted water into the potable water supply.

Specifications

  • Model: 475DABG
  • Nominal Size: 8 inch
  • Pattern: N-Pattern
  • End Connections: Grooved x Grooved
  • Valve Type: Galvanized Metered Butterfly Valves with integral supervisory switches

Materials

  • Main Valve Body: Ductile Iron ASTM A 536 Grade 4
  • Access Covers: Ductile Iron ASTM A 536 Grade 4
  • Elastomers: EPDM (FDA Approved), Buna Nitrile (FDA approved)
  • Springs: FDA Approved Fusion Epoxy Finish, Stainless Steel 300 Series
  • Fasteners: Stainless Steel, 300 Series
  • Polymer: NORYL+™

Performance Ratings

  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140°F
  • Hydrostatic Test Pressure (Grooved for Steel Pipe): 350 PSI
  • Hydrostatic Test Pressure (Flanged): 350 PSI
  • Relief Valve Discharge Port (8 inch): -2.69 sq. in.

Certificates & Approvals

  • ASSE Listed: 1013 (4 inch thru 8 inch)
  • AWWA Compliant: C550
  • UL Classified: (4 inch thru 10 inch)
  • cULus Classified: (4 inch thru 10 inch)
  • FM Approved: (4 inch thru 8 inch)
  • NYCFD Approved: (4 inch thru 8 inch)
  • CSA B64.4: (4 inch thru 8 inch)
  • Meets requirements of NSF/ANSI/CAN 61: (5% MAX. WEIGHTED AVERAGE LEAD CONTENT)

FAQs

What is the primary application of the Zurn 8 inch 475DABG backflow assembly?

The Zurn 8 inch 475DABG Reduced Pressure Detector Backflow Assembly is primarily used in high hazard fire protection systems. It prevents both backsiphonage and backpressure, protecting the potable water supply from contamination.

What type of connections does this backflow assembly use?

This 8 inch 475DABG model features grooved end connections. It comes with galvanized metered butterfly valves that include integral supervisory switches for enhanced system monitoring.

What is the purpose of the metered bypass system?

The integrated metered bypass system is designed to detect small leaks within the fire protection system and identify any unauthorized water usage. This feature helps in reducing water waste and maintenance costs by alerting to potential issues early.

What are the maximum operating pressure and temperature for the 8 inch 475DABG?

The Zurn 8 inch 475DABG is rated for a maximum working water pressure of 175 PSI and a maximum working water temperature of 140°F. The hydrostatic test pressure for grooved connections is 350 PSI.

What certifications and approvals does this backflow assembly hold?

The 8 inch 475DABG is ASSE Listed 1013, AWWA Compliant C550, UL Classified, cULus Classified, FM Approved, NYCFD Approved, and CSA B64.4. It also meets NSF/ANSI/CAN 61 requirements for lead content.

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