4 475 RPDA DI BODY VERT GAL MTR BFLY GRV X GRV

Item Number: 4-475DAVBG
1 1
$18,802.84
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Reduced Pressure Principle Detector Assembly (RPDA)
  • Nominal Size: 4 inch
  • Body Material: FDA Approved Fusion Epoxy Coated Ductile Iron
  • Valve Type: Grooved End Butterfly Valves with Integral Supervisory Switches
  • Maximum Working Pressure: 175 PSI
  • Maximum Working Temperature: 140°F
  • Installation: Vertical z-Pattern flow up orientation
  • Detects leaks with metered bypass system

Description

The Zurn 4" 475DAVBG Reduced Pressure Detector Backflow Assembly is designed for high-hazard fire protection applications. It safeguards potable water supplies from contamination due to backsiphonage and backpressure. Featuring a vertical z-Pattern design, this assembly includes grooved end butterfly valves with integral supervisory switches and a metered bypass system to detect leaks and unauthorized water use. Constructed with an FDA approved fusion epoxy coated ductile iron body, it offers durability and is ideal for retrofit installations. Rated for 175 PSI maximum working pressure and 140°F maximum working temperature.

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Installation Guidance

  • This Zurn 475DAVBG assembly is designed for vertical installation in a z-Pattern, with a flow-up orientation.
  • Connections are made using grooved end butterfly valves.
  • Installation must adhere to all local codes, manufacturer's instructions, and the latest edition of the Uniform Plumbing Code.
  • The unit must be mounted above adequate drains with sufficient side clearance for testing and maintenance, and no part of the assembly should be submerged.
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Additional Details

The Zurn 4" 475DAVBG Reduced Pressure Detector Backflow Assembly is designed for fire protection applications to prevent backsiphonage and backpressure of contaminated water into the potable water supply. This assembly features a z-Pattern vertical flow orientation and includes a metered bypass system for detecting leaks and unauthorized water use.

Key Features

  • Provides high health hazard fire protection for potable water systems
  • Protects against both backsiphonage and backpressure contamination
  • Features a compact z-Pattern vertical flow-up orientation, ideal for retrofit installations
  • Equipped with a metered bypass system to detect leaks and unauthorized water usage
  • Comes standard with grooved end butterfly valves including integral supervisory switches
  • Main body and access covers are FDA approved fusion epoxy coated ductile iron for corrosion resistance

Construction Materials

  • Main Body and Access Covers: Ductile Iron (ASTM A536 Grade 4) with FDA Approved Fusion Epoxy Finish
  • Seat Ring and Check Valve: NORYL™
  • Stem: Stainless Steel (ASTM A 276)
  • Seat Disc Elastomers: EPDM
  • O-rings: Buna (FDA Approved Nitrile)
  • Fasteners and Springs: Stainless Steel (300 Series)

Specifications

  • Model: 475DAVBG
  • Nominal Size: 4 inch
  • Application: Fire Protection
  • Design: Reduced Pressure Principle Detector Assembly
  • Installation Pattern: Z-Pattern, Vertical Up Flow
  • Main Body Material: Ductile Iron (ASTM A536 Grade 4)
  • Main Body Coating: FDA Approved Fusion Epoxy Finish
  • Access Covers Material: Ductile Iron (ASTM A536 Grade 4)
  • Access Covers Coating: FDA Approved Fusion Epoxy Finish
  • Seat Ring Material: NORYL™
  • Check Valve Material: NORYL™
  • Stem Material: Stainless Steel (ASTM A 276)
  • Seat Disc Elastomer: EPDM
  • O-Ring Material: Buna (FDA Approved Nitrile)
  • Fasteners Material: Stainless Steel (300 Series)
  • Springs Material: Stainless Steel (300 Series)
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140°F
  • Hydrostatic Test Pressure: 350 PSI

Certificates & Approvals

  • NSF/ANSI/CAN 61
  • ASSE® Listed 1047
  • AWWA Compliant C550 (4" thru 8")
  • UL® Classified (4" thru 10")
  • FM Approved (4" thru 10")
  • NYC MEA 170-00-M, VOL 2 (4" thru 8")
  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California (4" thru 8")
  • Meets requirements of NSF/ANSI/CAN 61 (2-1/2" thru 12", 200 PSI MAX. WEIGHTED AVERAGE LEAD CONTENT)

FAQs

What is the primary application of the Zurn 475DAVBG backflow assembly?

The Zurn 475DAVBG is primarily used in high-hazard fire protection systems to prevent the contamination of potable water due to backsiphonage and backpressure.

What type of connections does this model use?

This model features 4-inch grooved end butterfly valves, which also include integral supervisory switches for enhanced monitoring.

What is the benefit of the metered bypass system?

The metered bypass system is designed to detect small leaks and any unauthorized water usage, helping to conserve water and identify potential system issues.

What material is the main body constructed from?

The main body and access covers are made from durable Ductile Iron (ASTM A536 Grade 4) and are coated with an FDA approved fusion epoxy finish for corrosion resistance.

What is the maximum operating pressure and temperature?

The Zurn 475DAVBG backflow assembly is rated for a maximum working water pressure of 175 PSI and a maximum working water temperature of 140°F.

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