Wilkins 4" 450 OS&Y Gate Valves

Item Number: 4-450OSY
1 1
$11,782.06
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Nominal Size: 4 inch
  • Weight: 340.0 lb
  • Product Type: Double Check Valve Assembly
  • Valve Type: OS&Y Gate Valves (Full Port)
  • Main Body Material: Epoxy Coated Ductile Iron
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140° F
  • Lead-Free Compliant: Yes (NSF/ANSI/CAN 61)
  • Configuration: n-Pattern for compact installations

Description

The Wilkins 4" 450 OS&Y Gate Valve is a lead-free Double Check Valve Assembly designed to protect potable water systems from backsiphonage and backpressure in low health hazard applications. This 4-inch model features a durable, epoxy-coated ductile iron body and includes full port OS&Y gate valves for reliable shut-off. Its n-Pattern configuration is ideal for compact installations, offering superior performance with a patented center-stem guided compound check. Certified to ASSE 1015, IAPMO, CSA B64.5, and NSF/ANSI/CAN 61, it ensures compliance with critical safety standards. Item number 4-450OSY.

Help Me Connect

Connections

  • The Wilkins Model 450 Double Check Valve Assembly is supplied with flanged end connections for secure installation into your piping system.
  • This specific model includes OS&Y gate valves, which are designed for robust shut-off control, attached to the main assembly.
  • The n-Pattern configuration is optimized for installations in compact spaces, making it versatile for various plumbing layouts.
View full details

Additional Details

The Wilkins 4" 450 OS&Y Gate Valve is a Double Check Valve Assembly designed for installation on potable water lines to prevent backsiphonage and backpressure of polluted water into the potable water supply. This lead-free compliant assembly is ideal for applications where a low potential health hazard exists.

Featuring an n-Pattern configuration, this device is suitable for both new and retrofit installations in compact locations, supplied with OS&Y gate valves for shut-off control.

Construction & Design

  • Main body and access covers are constructed from corrosion-resistant, epoxy-coated ductile iron (ASTM A536 Grade 4).
  • Features a patented, center-stem guided Compound Check design for low headloss and reliable performance.
  • The device is equipped with full port OS&Y gate valves, made of epoxy-coated cast iron series 408 resilient wedge.
  • A single access cover provides convenient access, reducing maintenance downtime.
  • Checks are accessible for maintenance without removing the device from the line.
  • Includes stainless steel fasteners and springs.
  • Elastomers are EPDM and Buna Nitrile.

This is a non-stock, special order item and could take up to 2 weeks or more to deliver. All non-stock items are non-refundable. Please be sure you order carefully. If you have ANY questions please contact us before ordering.

Specifications

  • Product Type: Double Check Valve Assembly
  • Brand: Wilkins (by Zurn)
  • Model: 450 with OS&Y Gate Valves
  • Nominal Size: 4 inch
  • Configuration: n-Pattern
  • End Connections: Flanged
  • Main Body Material: Ductile Iron (ASTM A536 Grade 4)
  • Gate Valve Material: Epoxy Coated Cast Iron (Series 408 Resilient Wedge)
  • Coating: FDA Approved Fusion Epoxy Finish
  • Fasteners: Stainless Steel, 300 Series
  • Springs: Stainless Steel, 300 Series
  • Elastomers: EPDM (FDA Approved), Buna Nitrile (FDA Approved)
  • Polymers: NORYL™
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140° F
  • Hydrostatic Test Pressure: 350 PSI

Certificates & Approvals

  • ASSE® Listed 1015
  • IAPMO® Listed
  • CSA® Certified B64.5
  • AWWA Compliant C510, C550
  • UL® Classified
  • C-UL® Classified
  • FM® Approved
  • NYC MEA 213-99-M VOL 3
  • Approved by Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • Meets NSF/ANSI/CAN 61 requirements (Lead-Free Compliant)

FAQs

What is the primary purpose of the Wilkins 4" 450 OS&Y Gate Valve?

Its primary purpose is to protect potable water lines from contamination due to backsiphonage and backpressure, specifically in low health hazard applications.

Is this product compliant with lead-free regulations?

Yes, the Wilkins 4" 450 OS&Y Gate Valve meets the requirements of NSF/ANSI/CAN 61, making it lead-free compliant for potable water applications.

What type of end connections does this specific model have?

This model is supplied with flanged end connections, which are standard for its epoxy-coated cast iron construction.

What does "OS&Y Gate Valves" mean in the product name?

OS&Y stands for "Outside Stem and Yoke." This indicates that the valve stem rises when the valve is opened, providing a visual indication of the valve's position, and the gate valves are included for shut-off control.

What is the maximum working pressure and temperature for this assembly?

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

Related Products