4 375 RPDA, FLG BODY, FLG X FLG, LESS GATE VALVES

Item Number: 4-375DAL
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$9,824.76
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • 4 inch Reduced Pressure Principle Detector Assembly
  • Epoxy-coated ductile iron body for durability
  • Stainless steel internals for corrosion resistance
  • Metered bypass for leak and unauthorized use detection
  • Maximum Working Pressure: 175 PSI
  • Maximum Working Water Temperature: 140 °F
  • ASSE® Listed 1047
  • NSF/ANSI/CAN 61 and CSA B64.4 Certified

Description

The Zurn Wilkins 375DA Reduced Pressure Principle Detector Backflow Assembly provides robust protection against backsiphonage and backpressure in high hazard fire protection systems. This 4-inch flanged unit features a metered bypass to detect leaks and unauthorized water use, ensuring system integrity and preventing water contamination. Constructed with an epoxy-coated ductile iron body and stainless steel internals, it offers excellent durability and corrosion resistance. The 375DA is ASSE® Listed 1047, NSF/ANSI/CAN 61, and CSA B64.4 certified, ensuring compliance and reliable performance with low headloss. Item number 4-375DAL.

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Connections

This Zurn Wilkins 375DA backflow preventer is designed for direct installation into a 4 inch flanged pipe system. The end connections feature a flanged bolt pattern, suitable for connecting to compatible flanged steel pipes. Please note that this model is supplied less gate valves, meaning isolation gate valves for upstream and downstream connections will need to be supplied separately.

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Additional Details

The Zurn Wilkins 375DA Reduced Pressure Principle Detector Backflow Assembly is designed to protect against backsiphonage and backpressure of contaminated water in high hazard, fire protection applications. It features a metered bypass to effectively detect leaks and any unauthorized water use within the system.

Key Features

  • Protects against contaminated water in high hazard fire protection applications
  • Metered bypass detects leaks and unauthorized water use
  • Zurn Wilkins Compound Check for low headloss and superior performance
  • Short lay-length for ideal backflow replacement
  • Lowest lifecycle costs

Construction

  • Epoxy-coated ductile iron body and access covers for corrosion resistance
  • Stainless steel internals, fasteners, springs, and sensing line
  • Seat ring and check valve made of NORYL™
  • Elastomers include EPDM (FDA approved) and Buna Nitrile (FDA approved)

Maintenance

  • Relief valve and checks are easily accessible for in-line maintenance without removing the device from the line

Specifications

General

  • Product Type: Reduced Pressure Principle Detector Backflow Assembly
  • Model: 375DA
  • Size: 4 inch
  • Connection Type: Flanged (for steel pipe)
  • Gate Valves: Less Gate Valves
  • Application: High hazard fire protection systems

Performance

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

Materials

  • Main Body Valve: Ductile Iron ASTM A 536, epoxy coated
  • Access Covers: Ductile Iron ASTM A 536, epoxy coated
  • 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)
  • Springs: Stainless Steel, 300 Series
  • Sensing Line: Stainless Steel, braided hose

Certificates & Approvals

  • ASSE® Listed 1047
  • UL® Classified
  • AWWA Compliant C550
  • CSA B64.4
  • NSF/ANSI/CAN 61
  • FM® Approved
  • NYCC 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 Reduced Pressure Principle Detector Backflow Assembly?

Its primary purpose is to protect against backsiphonage and backpressure of contaminated water in high hazard fire protection applications, ensuring the safety of the potable water supply.

How does the metered bypass function on the 375DA?

The metered bypass allows for the detection of leaks and any unauthorized water use within the system. This feature helps to identify small water flows that might indicate a problem.

What are the main construction materials of the Zurn Wilkins 375DA?

The main body and access covers are made from epoxy-coated ductile iron (ASTM A 536) for durability and corrosion resistance. The internals, fasteners, and springs are stainless steel, with NORYL™ for seat rings/check valves and EPDM/Buna Nitrile elastomers.

Does this 4-inch 375DA model come with gate valves?

No, this specific model (4-375DAL) is supplied "less gate valves." Upstream and downstream isolation gate valves must be procured separately for a complete installation.

What certifications does the Zurn Wilkins 375DA backflow preventer hold?

The 375DA is ASSE® Listed 1047, UL® Classified, AWWA Compliant C550, CSA B64.4, NSF/ANSI/CAN 61, and FM® Approved, among other approvals.

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