6 450 DC DI BODY, N-PATTERN, GRV X GRV, LESS GATE VALVES

Item Number: 6-450L
1 1
$11,847.30
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Zurn Model 450 Double Check Backflow Assembly
  • 6 inch with Grooved End Connections
  • Supplied Less Gate Valves
  • Epoxy-Coated Ductile Iron Body
  • Maximum Working Pressure: 175 psi
  • Maximum Working Temperature: 140° F
  • Lead-Free Compliant (NSF/ANSI/CAN 61)
  • ASSE® 1015, IAPMO, CSA B64.5 Certified

Description

The Zurn Model 450 Double Check Backflow Assembly is a 6-inch n-pattern unit designed to protect potable water lines from backsiphonage and backpressure of polluted water. This assembly is lead-free compliant (NSF/ANSI/CAN 61) and ideal for low health hazard applications requiring compact installations. It features a durable epoxy-coated ductile iron body and grooved end connections, supplied without gate valves. The patented Compound Check ensures reliable performance with low headloss. It is ASSE® Listed 1015, IAPMO® Listed, and CSA® Certified B64.5, ensuring high standards for water safety.

Help Me Connect

Connections

  • This 6-inch backflow assembly features grooved end connections on both the inlet and outlet, designed for use with steel piping systems.
  • The product is supplied without integral shut-off or gate valves.

Compatibility

  • Designed for installation on potable water lines.
  • Suitable for applications protecting against backsiphonage and backpressure in low health hazard environments.
View full details

Additional Details

The Zurn Model 450 Double Check Backflow Assembly, SKU 6-450L, is a 6-inch n-pattern unit designed for installation on potable water lines. It protects against both backsiphonage and backpressure of polluted water into the potable water supply in low health hazard applications where lead-free valves are required. This configuration is supplied with grooved end connections and without gate valves, making it suitable for compact installations.

Design and Performance

  • N-Pattern design facilitates installation in compact enclosures and tight spaces.
  • Features a patented, center-stem guided Compound Check for low headloss and reliable, superior performance.
  • A single access cover simplifies maintenance and reduces downtime.
  • Epoxy-coated ductile iron body provides excellent corrosion resistance.

Construction 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

Operational Limits

  • Maximum Working Water Pressure: 175 psi
  • Maximum Working Water Temperature: 140° F
  • Hydrostatic Test Pressure: 350 psi

Specifications

  • Brand: Zurn
  • Model: 450
  • Type: Double Check Backflow Assembly
  • Size: 6 inch
  • Pattern: N-Pattern
  • End Connections: Grooved (for steel)
  • Gate Valves: Less Gate Valves
  • Maximum Working Water Pressure: 175 psi
  • Maximum Working Water Temperature: 140° F
  • Hydrostatic Test Pressure: 350 psi

Construction 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

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 the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • Meets NSF/ANSI/CAN 61* (0.25% Max. Weighted Average Lead Content)

FAQs

What is the main purpose of the Zurn Model 450 Double Check Backflow Assembly?

This assembly is designed to protect potable water lines by preventing both backsiphonage and backpressure of polluted water into the supply. It is suitable for low health hazard applications.

What type of end connections does this 6-inch Zurn Model 450 have?

This specific Zurn Model 450 assembly (SKU 6-450L) features grooved end connections on both the inlet and outlet, designed for steel piping systems.

Does the SKU 6-450L include shut-off or gate valves?

No, this configuration is supplied "less gate valves" as indicated by the product name. It is designed for installations where gate valves are sourced separately or not required in this specific section.

What are the key materials used in the construction of this backflow assembly?

The main valve body and access covers are made of epoxy-coated ductile iron, with stainless steel fasteners and springs. Elastomers include EPDM and Buna Nitrile, and polymers are NORYL™.

What certifications and approvals does the Zurn Model 450 hold?

The Zurn Model 450 is ASSE® Listed 1015, IAPMO® Listed, CSA® Certified B64.5, AWWA Compliant C510 and C550, UL® Classified, C-UL® Classified, and FM® Approved. It also meets NSF/ANSI/CAN 61 lead-free requirements.