4 475 RPDA DI BODY N-PATTERN, GRV X GRV, LESS GATE VALVES

Item Number: 4-475DAL
1 1
$12,784.69
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Size: 4 inch
  • Model: 475DA
  • Body Pattern: N-Pattern
  • End Connections: Grooved, Less Gate Valves
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140°F
  • Metered bypass system included for leak detection
  • Lead-Free design, NSF/ANSI/CAN 61 compliant

Description

The Zurn Wilkins 475DA Reduced Pressure Detector Assembly (RPDA) is a 4-inch N-pattern backflow preventer designed for fire protection systems. It features grooved end connections and is supplied without gate valves, ideal for specific system configurations. This assembly protects potable water from backsiphonage and backpressure, ensuring safety where health hazards exist. Key features include a metered bypass for leak and unauthorized use detection, and a durable ductile iron body with an FDA-approved epoxy finish. Its compact N-pattern design is optimal for new or retrofit installations in confined spaces.

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Connections

  • The Zurn Wilkins 475DA is equipped with 4-inch grooved end connections, specifically designed for secure installation on steel pipe within water lines.
  • This backflow preventer features an N-pattern body configuration, making it well-suited for both new and retrofit applications in compact or confined spaces within fire protection systems.
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Additional Details

The Zurn Wilkins 475DA Reduced Pressure Detector Assembly (RPDA) with a 4-inch grooved connection is engineered for installation on water lines within fire protection systems. This N-pattern backflow preventer provides essential protection against both backsiphonage and backpressure of contaminated water into the potable supply, particularly in areas where a potential health hazard exists.

It features a metered bypass system designed to detect leaks and unauthorized water usage, offering a cost-effective solution for monitoring and maintenance in fire protection applications. Its compact design is ideal for new or retrofit installations in confined spaces.

Key Features

  • 4-inch grooved end connections for steel pipe
  • N-pattern body configuration for compact installations
  • Integrated metered bypass system for leak and unauthorized use detection
  • Protects against backsiphonage and backpressure
  • Main valve body and access covers constructed from Ductile Iron ASTM A 536 Grade 4
  • Features FDA Approved fusion epoxy finish
  • Elastomers include EPDM and Buna Nitrile (both FDA approved)
  • Internal polymers made from NORYL™
  • Springs manufactured from Stainless Steel, 300 series

Specifications

  • Size: 4 inch
  • Model: 475DA
  • Body Pattern: N-Pattern
  • End Connections: Grooved
  • Shut-Off Valves: Less Gate Valves

Materials

  • Main Valve Body: Ductile Iron ASTM A 536 Grade 4
  • Access Covers: Ductile Iron ASTM A 536 Grade 4
  • Coatings: FDA Approved fusion epoxy finish
  • 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
  • Relief Valve Discharge Port (4"-6" sizes): 2.75 sq. in.

Connections & Dimensions

  • End Connection Standard (Grooved): AWWA C606
  • Weight (Less Shutoff Valves): 113 lbs (51 kg)
  • Approximate Dimension A (Less Gate Valves): 18 5/16 in (465 mm)
  • Approximate Dimension B (Less Gate Valves): 21 in (533 mm)

Certificates & Approvals

  • ASSE® Listed 1047 (4" thru 8")
  • AWWA Compliant C550
  • UL® Classified (4" thru 10")
  • C-UL® Classified (4" thru 10")
  • FM® Approved (4" thru 8")
  • NYC MEA 170-02-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 the requirements of NSF/ANSI/CAN 61 (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

FAQs

What is the primary purpose of the Zurn Wilkins 475DA?

The Zurn Wilkins 475DA is a Reduced Pressure Detector Assembly designed for installation in fire protection systems to prevent contaminated water from flowing back into the potable water supply, protecting against both backsiphonage and backpressure.

What type of end connections does the 475DA model have?

This 4-inch 475DA model comes with grooved end connections, specifically designed for secure installation on steel pipe.

Is this backflow preventer designed for compact spaces?

Yes, the 475DA features an "N-pattern" body, which is specifically designed for new or retrofit installations in compact or confined spaces within fire protection systems.

What is the maximum operating pressure and temperature for this device?

The Zurn Wilkins 475DA has a maximum working water pressure of 175 PSI and a maximum working water temperature of 140°F.

Does the 4-475DAL SKU include shut-off gate valves?

No, the 4-475DAL SKU is supplied "less gate valves," meaning shut-off valves are not included with this specific assembly.

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