6 375 RPDA, FLG BODY, FLG X FLG, LESS GATE VALVES

Item Number: 6-375DAL
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$14,498.27
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Size: 6 inch
  • Reduced Pressure Principle Detector Backflow Assembly
  • Protects against backsiphonage and backpressure
  • Metered bypass detects leaks and unauthorized water use
  • Epoxy-coated ductile iron body resists corrosion
  • Stainless steel internals for durability
  • Low headloss Zurn Wilkins Compound Check
  • ASSE® Listed 1047, UL® Classified, FM® Approved

Description

The Zurn Wilkins 6-inch 375DA Reduced Pressure Principle Detector Backflow Assembly safeguards high-hazard fire protection systems from contaminated water. Its epoxy-coated ductile iron body and stainless steel internals provide excellent corrosion resistance. A metered bypass actively detects leaks and unauthorized water use, optimizing water management. This flanged (FLG x FLG) model is supplied without integrated gate valves, offering installation flexibility. Key certifications include ASSE 1047, UL, FM, and AWWA C550 compliance. Designed for durability and easy in-line maintenance, it ensures reliable backflow prevention for critical applications. Item number 6-375DAL.

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Connections and Installation

This Zurn Wilkins 375DA backflow assembly features flanged (FLG X FLG) end connections designed for direct installation into a piping system. Since this specific model is supplied without integral OS&Y gate valves, external isolation valves must be provided and installed upstream and downstream to allow for testing and maintenance. The flanged connections conform to ASME B16.42 Class 150 standards for compatibility with similarly rated flanged piping.

Installation must comply with local codes, manufacturer's instructions, and the latest edition of the Uniform Plumbing Code. Ensure the assembly is mounted between 12" and 30" above adequate drains, with sufficient side clearance for testing and maintenance.

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Additional Details

The Zurn Wilkins 375DA Reduced Pressure Principle Detector Backflow Assembly protects against backsiphonage and backpressure of contaminated water in high-hazard fire protection applications. This 6-inch model features a metered bypass to effectively detect leaks and unauthorized water use, helping to decrease costs over time. It is supplied without integral gate valves, offering flexibility for installation where separate isolation valves are preferred or already in place.

Construction & Features

  • Epoxy-coated ductile iron body and access cover provide superior corrosion resistance for long-term durability.
  • Stainless steel internals, fasteners, springs, and sensing line ensure robust performance and resist corrosion.
  • The Zurn Wilkins Compound Check design offers low headloss and superior hydraulic performance.
  • Accessible relief valve and checks allow for easy in-line maintenance without removing the device from the pipeline.
  • Designed for installations where connections are flanged (FLG X FLG).

Specifications

  • Product Type: Reduced Pressure Principle Detector Backflow Assembly
  • Model: 375DA
  • Size: 6 inch
  • Body Material: Epoxy-coated Ductile Iron (ASTM A 536)
  • Access Covers: Ductile Iron (ASTM A 536)
  • Coatings: NSF Approved Fusion Epoxy Finish
  • Internals: Stainless Steel, 300 Series, NORYL™
  • Fasteners: Stainless Steel, 300 Series
  • Elastomers: EPDM (FDA Approved), Buna Nitrile (FDA Approved), NORYL™
  • Springs: Stainless Steel, 300 Series
  • Sensing Line: Stainless Steel, Braided Hose
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 140 °F
  • Hydrostatic Test Pressure: 350 PSI
  • End Connections: Flanged (FLG x FLG), ASME B16.42 Class 150

Certificates & Approvals

  • ASSE® Listed 1047
  • UL® Classified
  • FM® Approved
  • AWWA Compliant C550
  • CSA B64.4 (4" & 6")
  • IAPMO Listed
  • NYC MEA 218-01-M Vol 3
  • 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 purpose of the Zurn Wilkins 375DA backflow assembly?

The Zurn Wilkins 375DA is a Reduced Pressure Principle Detector Backflow Assembly designed to protect potable water supplies from contamination due to backsiphonage and backpressure in high-hazard fire protection applications.

What does "Less Gate Valves" mean for this specific 375DA model?

"Less Gate Valves" indicates that this particular model is supplied without the integral OS&Y gate valves that typically come with the Zurn Wilkins 375DA. Users will need to install their own isolation gate valves upstream and downstream of the assembly.

How does the metered bypass function on this device?

The metered bypass on the 375DA continuously monitors low flow rates. This allows for the detection of leaks within the fire protection system or unauthorized water use, providing valuable information for water management.

What are the main materials used in the construction of the 375DA backflow preventer?

The main body and access covers are made of epoxy-coated ductile iron for corrosion resistance. Internals, fasteners, and springs are stainless steel, with elastomers made of EPDM and Buna Nitrile.

What certifications does the Zurn Wilkins 375DA hold?

The Zurn Wilkins 375DA is certified to multiple standards, including ASSE® Listed 1047, UL® Classified, FM® Approved, AWWA Compliant C550, and CSA B64.4. It also meets NSF/ANSI/CAN 61 requirements for lead content.

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