Wilkins 4" 450 Less Gates

Item Number: 4-450
1 1
$11,325.35
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: 293.0 lb
  • Valve Type: Double Check Valve Assembly
  • Without Gate Valves
  • Body Material: Epoxy-coated Ductile Iron
  • Maximum Working Pressure: 175 psi
  • Maximum Working Temperature: 140° F
  • Lead Free Compliant
  • "N" Pattern configuration for compact spaces

Description

The Wilkins 4" Model 450 Double Check Valve Assembly Less Gates provides reliable backflow protection for potable water lines in low health hazard applications. Designed for replacement or integration with existing gate valves, this 4-inch device features an epoxy-coated ductile iron body for corrosion resistance and an "N" pattern configuration ideal for compact installations. It is ASSE® Listed 1015, IAPMO® Listed, and NSF/ANSI/CAN 61 compliant for lead-free use. With a maximum working pressure of 175 psi and a single access cover for easy maintenance, it ensures protection against backsiphonage and backpressure. Item number 4-450.

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Compatibility & Connections

The Wilkins Model 450 Double Check Valve Assembly is designed to integrate seamlessly into existing potable water systems, particularly for replacement applications where gate valves are already present. This 4-inch device features a robust flanged connection, compatible with AWWA C606 and ANSI B16.42 Class 150 standards. Its "N" pattern configuration is ideal for compact installations and retrofits.

  • This assembly is supplied without gate valves, intended for use with your pre-existing shut-off valves.
  • The flanged end connections are suitable for steel piping systems.
  • Designed for low health hazard applications in potable water lines.
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Additional Details

The Wilkins Model 450 Double Check Valve Assembly Less Gates is designed for installation on potable water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply, specifically where a potential health hazard does not exist. This 4 inch device comes without gate valves, ideal for replacement or integration with existing valves. It features an "N" pattern configuration and is Lead Free Compliant.


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.

Key Features

  • Designed for low health hazard applications
  • Epoxy-coated ductile iron body and access covers for corrosion resistance
  • "N" Pattern configuration for compact installations and retrofits
  • Patented, center-stem guided Compound Check for low headloss and reliable performance
  • Single access cover for reduced maintenance downtime
  • Constructed with stainless steel fasteners and springs

Connections & Design

  • 4 inch nominal size
  • Flanged end connections
  • Utilizes a center stem guided design with two torsion springs to bias the check in the closed position
  • Checks are accessible for maintenance without removing the device from the line

Specifications

General

  • Model: 450 Less Gates
  • Nominal Size: 4 inch
  • Application: Potable Water Lines, Low Health Hazard
  • Pattern: "N" Pattern
  • Valve Type: Double Check Valve Assembly

Performance Ratings

  • 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
  • Access Covers: Ductile Iron ASTM A536 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

End Connections

  • Connection Type: Flanged
  • Flange Standard: ANSI B16.42 Class 150
  • Companion Flange Standard: AWWA C606

Certificates & Approvals

  • ASSE® Listed 1015
  • IAPMO® Listed
  • CSA® Certified B64.5
  • AWWA Compliant C510, and C550
  • UL® Classified
  • C-UL® Classified
  • FM® Approved
  • NYC MEA 213-99-M VOL 3
  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • NSF/ANSI/CAN 61 Compliant (0.25% Max. Weighted Average Lead Content)

FAQs

What is the primary application of the Wilkins Model 450 Double Check Valve Assembly?

It is designed for installation on potable water lines to protect against both backsiphonage and backpressure of polluted water, specifically in low health hazard applications where lead-free valves are required.

Does this model include gate valves?

No, the Wilkins Model 450 Less Gates is supplied without gate valves. It is intended for replacement applications or use with your pre-existing shut-off valves.

What type of connections does this 4-inch backflow preventer use?

This device features flanged end connections, which conform to ANSI B16.42 Class 150 and are compatible with AWWA C606 companion flanges for steel piping systems.

What materials are used in the construction of the Model 450?

The main valve body and access covers are made of epoxy-coated ductile iron (ASTM A536 Grade 4). Fasteners and springs are stainless steel, while elastomers are EPDM and Buna Nitrile, and polymers are NORYL™.

What is the maximum operating pressure and temperature?

The Wilkins Model 450 has a maximum working water pressure of 175 psi and a maximum working water temperature of 140° F.

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