8 475 RP, N-PATTERN, GRV X GRV, LESS GATE VALVES

Item Number: 8-475L
1 1
$32,878.14
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Size: 8 inch
  • Flow Pattern: N-Pattern
  • End Connections: Grooved x Grooved
  • Maximum Working Water Pressure: 175 PSI
  • Body Material: Ductile Iron ASTM A536 Grade 4
  • Coating: FDA Approved Fusion Epoxy Finish
  • Certified Lead-Free to NSF/ANSI/CAN 61
  • ASSE® Listed 1013

Description

The ZURN Model 475 Reduced Pressure Principle Backflow Preventer is an 8-inch, N-Pattern device designed to protect potable water lines from backsiphonage and backpressure in high hazard applications. Its ductile iron body is coated with an FDA-approved fusion epoxy finish for corrosion resistance. Featuring grooved x grooved connections and a patented center-stem guided Compound Check, it ensures reliable performance and low headloss. This lead-free unit meets strict certifications including ASSE 1013, AWWA C511/C550, CSA B64.4, CUPC, and NSF/ANSI/CAN 61, making it a robust solution for vertical flow up and down installations in compact spaces.

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Connections

  • This ZURN Model 475 backflow preventer features 8 inch grooved connections on both the inlet and outlet.
  • Grooved connections are designed for quick and easy assembly and disassembly with grooved pipe or fittings, typically using a coupling that engages the grooves.
  • Ensure that the mating pipe or fittings also have 8 inch grooved ends compatible with AWWA C606-87 standards for steel pipe.
  • This unit is supplied less gate valves, meaning shut-off valves must be installed upstream and downstream if required for maintenance or isolation.
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Additional Details

The ZURN Model 475 Reduced Pressure Principle Backflow Preventer is designed for installation on potable water lines, providing protection against both backsiphonage and backpressure of contaminated water where a potential health hazard exists.

This 8 inch model features an N-Pattern configuration, making it suitable for both vertical flow up and vertical flow down applications, ideal for new installations or retrofits in compact spaces.

Application & Use

  • Protects potable water lines from backsiphonage and backpressure contamination.
  • Provides protection where a potential health hazard exists.
  • Suitable for high hazard, potable water applications.
  • Designed for installations requiring vertical flow up and vertical flow down.

Design & Features

  • N-Pattern construction offers a space-saving design, excellent for retrofit installations in small spaces.
  • Equipped with a patented, center-stem guided Compound Check for low headloss, superior reliability, and unmatched performance.
  • Features a single access cover to reduce maintenance downtime and repair costs.
  • Center stem guided design incorporates two torsion springs to bias the check in the closed position.
  • First and second checks are easily accessible for maintenance without removing the relief valve or the entire device.
  • Lead-Free compliance ensures safety for potable water applications.

Materials

  • Main valve body and access covers are constructed from Ductile Iron ASTM A536 Grade 4.
  • Body and covers feature an FDA Approved fusion epoxy finish for corrosion resistance.
  • Internals, fasteners, and springs are made from Stainless Steel, 300 Series.
  • Elastomers include EPDM (FDA approved) and Buna Nitrile (FDA approved).
  • Polymers are made from NORYL™.

Specifications

  • Size: 8 inch
  • Flow Pattern: N-Pattern
  • End Connections: Grooved x Grooved (AWWA C606-87 for steel pipe)
  • Main Valve Body Material: Ductile Iron ASTM A536 Grade 4
  • Access Cover Material: Ductile Iron ASTM A536 Grade 4
  • Coating: FDA Approved Fusion Epoxy Finish
  • Internals Material: Stainless Steel, 300 Series, NORYL™
  • Fasteners Material: Stainless Steel, 300 Series
  • Elastomers: 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
  • Relief Valve Discharge Port Size: 3.69 sq. in. (for 8-10 inch models)

Certificates & Approvals

  • ASSE® Listed 1013
  • AWWA Compliant C511 (with gates only)
  • AWWA Compliant 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 application of the ZURN Model 475 Reduced Pressure Principle Backflow Preventer?

This backflow preventer is designed for installation on potable water lines to protect against both backsiphonage and backpressure of contaminated water, particularly in high hazard applications where a potential health hazard exists.

What type of connections does this 8 inch Model 475 have?

This specific Model 475 features 8 inch grooved connections on both the inlet and outlet, designed to connect with grooved steel pipe or fittings that comply with AWWA C606-87 standards.

Is this backflow preventer suitable for both vertical up and down flow?

Yes, the ZURN Model 475 is designed with an N-Pattern configuration, making it suitable for applications requiring both vertical flow up and vertical flow down, including new installations and retrofits in compact spaces.

What materials are used for the main body and internal components?

The main valve body and access covers are made of ductile iron ASTM A536 Grade 4 with an FDA Approved fusion epoxy finish. Internals, fasteners, and springs are constructed from stainless steel, 300 series, with elastomers being EPDM and Buna Nitrile.

Does this product meet lead-free requirements?

Yes, the ZURN Model 475 meets the requirements of NSF/ANSI/CAN 61, ensuring it complies with standards for lead-free plumbing products with a maximum weighted average lead content of 0.25%.

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