4 475 RP DI BODY N PATTERN, VERTICAL, OSY FLG X FLG

Item Number: 4-475VOSY
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$13,929.08
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Size: 4 inch
  • Configuration: Z-Pattern, Vertical Flow Up
  • End Connections: OS&Y Flanged x Flanged
  • Body Material: Ductile Iron ASTM A536 Grade 4
  • Coating: FDA Approved Fusion Epoxy Finish
  • Maximum Working Water Pressure: 175 PSI
  • Lead-Free: NSF/ANSI/CAN 61 Compliant
  • Checks: Patented Center-Stem Guided Compound Check

Description

The Zurn Wilkins 475VOSY is a 4-inch Reduced Pressure Principle Backflow Preventer designed for high health hazard potable water applications. It features an N-Pattern (Z-pattern) design for vertical flow up installations, complete with OS&Y flanged inlet and outlet gate valves. Constructed from durable ductile iron with an epoxy coating, this lead-free assembly ensures reliable protection against backsiphonage and backpressure. The patented center-stem guided Compound Check minimizes headloss and simplifies maintenance. Its compact footprint is ideal for new or retrofit projects requiring vertical flow up.
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Additional Details

The 4 inch Zurn Wilkins Model 475VOSY Reduced Pressure Principle Backflow Preventer provides high health hazard protection for potable water systems, guarding against both backsiphonage and backpressure of contaminated water. This assembly features an N-Pattern (Z-pattern) design, specifically for vertical flow up applications, and includes OS&Y flanged gate valves for both inlet and outlet connections.

The compact footprint of the 475VOSY makes it ideal for new installations and retrofits in tight spaces. It incorporates a patented, center-stem guided Compound Check for low headloss, reliable performance, and simplified maintenance with a single access cover.

Application

  • Designed for installation on potable water lines to protect against both backsiphonage and backpressure.
  • Provides protection where a potential health hazard exists.
  • Ideal for vertical flow up applications (N-Pattern/Z-Pattern configuration).
  • Suitable for use where lead-free valves are required.

Features

  • Reduced Pressure Principle assembly.
  • Z-Pattern (N-Pattern) configuration for vertical flow up.
  • OS&Y gate valves (flanged) with integral supervisory switches.
  • Patented, center-stem guided Compound Check for low headloss and superior reliability.
  • Single access cover for reduced maintenance time and cost.
  • Lead-free construction, meeting NSF/ANSI/CAN 61 requirements.

Specifications

  • Size: 4 inch
  • Main Valve Body Material: Ductile Iron ASTM A536 Grade 4
  • Access Covers Material: Ductile Iron ASTM A 536 Grade 4
  • Coatings: FDA 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
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140°F
  • Hydrostatic Test Pressure: 350 PSI
  • End Connections: Flanged (AWWA C606-87, ANSI B16.42 Class 150)
  • Configuration: Vertical flow up (475V)

Certificates & Approvals

  • ASSE® Listed 1013
  • AWWA Compliant C511 (with gates only), and C550
  • CSA B64.4 (4 inch thru 8 inch)
  • CUPC® Listed
  • UL® Classified
  • C-UL® Classified
  • FM® Approved
  • NYC MEA 468-99-M VOL 4
  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • Meets the requirements of NSF/ANSI/CAN 61 (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

FAQs

What type of hazards does the Zurn Wilkins 475VOSY protect against?

This backflow preventer is designed to protect potable water lines from both backsiphonage and backpressure of contaminated water, specifically in high health hazard applications.

What does the '475VOSY' designation mean for this backflow preventer?

The '475V' indicates a vertical flow up configuration with an N-Pattern (Z-pattern) body. 'OSY' signifies that it comes with OS&Y (Outside Stem & Yoke) flanged gate valves for both the inlet and outlet connections.

Is this 4-inch backflow preventer compliant with lead-free regulations?

Yes, the Zurn Wilkins Model 475VOSY meets the requirements of NSF/ANSI/CAN 61, ensuring it is lead-free with a maximum weighted average lead content of 0.25%.

What are the primary materials used in the construction of this device?

The main valve body and access covers are made of ductile iron ASTM A536 Grade 4 with an FDA Approved fusion epoxy finish. Internals are stainless steel and NORYL™, and elastomers are EPDM and Buna Nitrile.

What is the maximum operating pressure and temperature for the 475VOSY?

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

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