4 475 RP DI BODY N-PATTERN, GRV X GRV, LESS GATE VALVES

Item Number: 4-475L
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$9,254.80
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Reduced Pressure Principle Backflow Preventer
  • Size: 4 inch
  • Model: 475, N-Pattern (Vertical Flow Up/Down)
  • End Connections: Grooved x Grooved (Less Gate Valves)
  • Body Material: Epoxy Coated Ductile Iron
  • Maximum Working Pressure: 175 PSI
  • Certifications: ASSE® 1013, CSA B64.4, NSF/ANSI/CAN 61

Description

The Zurn 4 inch Model 475 Reduced Pressure Principle Backflow Preventer provides reliable protection for potable water lines against backsiphonage and backpressure in high-hazard applications. This N-Pattern device features grooved end connections and an epoxy coated ductile iron body for durability. Its patented center-stem guided Compound Check ensures low headloss and superior performance. Designed for vertical flow up and down installations, it is ideal for compact spaces and retrofit projects, with a single access cover simplifying maintenance. It is lead-free and extensively certified, including ASSE® 1013, CSA B64.4, and NSF/ANSI/CAN 61.

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Connections and Flow

  • This Model 475 backflow preventer features grooved end connections, designed for secure installation onto steel piping systems in accordance with AWWA C606-87.
  • The "less gate valves" configuration means it is supplied without integral shut-off valves.
  • The n-Pattern design allows for versatile installation in applications requiring either vertical flow up or vertical flow down, making it suitable for compact spaces.
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Additional Details

The Zurn 4 inch Model 475 Reduced Pressure Principle Backflow Preventer is designed for installation on potable water lines to protect against both backsiphonage and backpressure in high hazard applications.

This Model 475 features an n-Pattern (N-Shape) construction, making it ideal for new or retrofit installations in compact spaces, accommodating both vertical flow up and vertical flow down applications.

Features

  • Equipped with a patented, center-stem guided Compound Check for low headloss, superior reliability, and unmatched performance
  • Single access cover design reduces maintenance downtime and repair costs
  • Epoxy coated ductile iron body resists corrosion
  • Designed for use where lead-free valves are required

Specifications

  • Product Type: Reduced Pressure Principle Backflow Preventer
  • Model: 475
  • Size: 4 inch
  • Flow Pattern: N-Pattern (vertical up and down)
  • 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 Materials: Stainless steel, 300 Series; NORYL™
  • Fasteners Material: Stainless Steel, 300 Series
  • Elastomers Material: EPDM (FDA approved); Buna Nitrile (FDA approved)
  • Polymers Material: NORYL™
  • Springs Material: Stainless steel, 300 series
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140°F
  • Hydrostatic Test Pressure: 350 PSI
  • End Connections: Grooved for steel pipe (AWWA C606-87)

Certificates & Approvals

  • ASSE® Listed 1013
  • AWWA Compliant C511 (with gates only), and C550
  • CSA B64.4 (4" thru 8")
  • 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 is the primary function of the Zurn Model 475 backflow preventer?

The Zurn Model 475 is designed to protect potable water lines from contamination caused by both backsiphonage and backpressure in high-hazard applications.

What type of flow orientation is the Model 475 designed for?

The Model 475 features an n-Pattern design, allowing it to be installed in applications requiring both vertical flow up and vertical flow down.

What are the main body materials used in this backflow preventer?

The main valve body and access covers are made from epoxy coated ductile iron (ASTM A536 Grade 4), while internals, fasteners, and springs are stainless steel.

What certifications does the Model 475 hold?

The Model 475 is ASSE® Listed 1013, CSA B64.4 Certified, CUPC® Listed, UL® Classified, FM® Approved, and meets NSF/ANSI/CAN 61 requirements for lead content.

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

This backflow preventer has a maximum working water pressure of 175 PSI and a maximum working water temperature of 140°F.

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