4 475 RPDA DI BODY VERT GAL MTR, LESS GATE VALVES

Item Number: 4-475DAVL
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
  • Reduced Pressure Detector Assembly (RPDA)
  • Nominal Size: 4 inch
  • Vertical Up-flow (Z-Pattern) configuration
  • Less Shut-off Valves (Grooved Body Connections)
  • Includes GPM Meter for leak detection
  • Maximum Working Water Pressure: 175 PSI
  • Ductile Iron body with FDA approved fusion epoxy finish
  • ASSE® Listed 1047, NSF/ANSI/CAN 61 compliant

Description

The Zurn Wilkins Model 475DAV is a 4-inch Reduced Pressure Detector Assembly (RPDA) designed for vertical, up-flow fire protection system installations. It safeguards potable water from contamination due to backsiphonage and backpressure from hazardous sources. This Z-Pattern backflow preventer features a metered bypass for detecting leaks and unauthorized water use, offering cost savings on maintenance. Constructed with a durable ductile iron body and FDA-approved epoxy finish, it ensures reliability up to 175 PSI. The assembly is ASSE 1047 listed and NSF/ANSI/CAN 61 certified Lead-Free. Item number 4-475DAVL.

Help Me Connect

Installation Guidance

The Zurn Wilkins Model 475DAV Reduced Pressure Detector Assembly is designed for vertical, flow-up installations in a Z-Pattern configuration. Local codes and the latest edition of the Uniform Plumbing Code govern installation requirements. The assembly must be mounted above adequate drains with sufficient side clearance for testing and maintenance, ensuring no part of the unit can be submerged.

Connections

  • This model comes without shut-off valves and is suitable for grooved end connections for steel pipe, compliant with AWWA C606 standards.
  • It can also be connected via flanged ends, conforming to ANSI B16.42 Class 150.
View full details

Additional Details

The Zurn Wilkins Model 475DAV Reduced Pressure Detector Assembly (RPDA) is designed for installation on water lines in fire protection systems. It provides protection against both backsiphonage and backpressure of contaminated water into the potable water supply.

This assembly features a metered bypass system to detect leaks and unauthorized water use, helping to save on repairs and maintenance costs. Its compact footprint is ideal for quick and easy fire protection retrofit applications. The 475DAV is shaped in a Z-Pattern and is specifically installed vertically in a flow-up orientation.

Construction

  • The main body and access covers are constructed from ductile iron (ASTM A 536 Grade 4) with an FDA approved fusion epoxy finish for corrosion resistance.
  • Internal components include stainless steel fasteners and springs, NORYL™ polymers, and EPDM/Buna Nitrile elastomers.
  • The first and second checks are accessible for maintenance without removing the relief valve or the entire device from the line.

Specifications

  • Product Type: Reduced Pressure Detector Assembly (RPDA)
  • Model: 475DAV
  • Nominal Size: 4 inch
  • Configuration: Z-Pattern, Vertical Up-flow
  • Shut-off Valves: Less Shut-off Valves (Grooved Body Connections)
  • Meter: With GPM Meter
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140°F
  • Hydrostatic Test Pressure: 350 PSI

Materials

  • Main Valve Body: Ductile Iron ASTM A 536 Grade 4 (FDA Approved Fusion Epoxy Finish)
  • Access Covers: Ductile Iron ASTM A 536 Grade 4 (FDA Approved Fusion Epoxy Finish)
  • 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
  • Stem: Stainless Steel (ASTM A 276)
  • Seat Disc Elastomers: EPDM

End Connections

  • Grooved for Steel Pipe: AWWA C606
  • Flanged: ANSI B16.42 Class 150

Dimensions (Approximate)

  • Length (A): 18 7/8 inches (479 mm)
  • Height (C, Less Gate Valves): 18 1/2 inches (470 mm)
  • Width (D): 8 inches (203 mm)

Weight (Less Shut-off Valves)

  • Weight: 113 lbs (51 kg)

Relief Valve Discharge Port (4")

  • Area: 2.75 sq. in.

Certificates & Approvals

  • ASSE® Listed 1047
  • 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
  • NSF/ANSI/CAN 61 (0.25% Max. Weighted Average Lead Content) - Lead Free

FAQs

What is the primary application of the Zurn Wilkins Model 475DAV?

The primary application is for installation on water lines in fire protection systems to protect against backsiphonage and backpressure of contaminated water into the potable water supply.

How does the metered bypass system function?

The metered bypass system detects leaks and unauthorized water use, helping to save valuable time and money on repairs and maintenance costs by identifying issues early.

What are the key construction materials of this backflow preventer?

The main valve body and access covers are made of ductile iron with an FDA approved fusion epoxy finish. Internal components include stainless steel fasteners and springs, NORYL™ polymers, and EPDM/Buna Nitrile elastomers.

What are the maximum operating pressure and temperature for this model?

The maximum working water pressure is 175 PSI, and the maximum working water temperature is 140°F.

What certifications and approvals does the 475DAV hold?

It is ASSE® Listed 1047, AWWA Compliant C550, UL® Classified, FM® Approved, NYC MEA approved, and meets NSF/ANSI/CAN 61 requirements for lead-free content.

Related Products

1 2