1.5 975 RP, FNTP OSY X FNPT OSY

Item Number: 112-975XLOSY
1 1
$3,409.52
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Size: 1-1/2 inch
  • Maximum Working Water Pressure: 175 PSI
  • Main Valve Body: Cast Bronze (ASTM B 584)
  • Elastomers: Silicone
  • Polymers: Noryl™
  • End Connections: FNPT OSY x FNPT OSY Threaded
  • ASSE® Listed 1013, UPC® Listed, CSA B64.4
  • Designed for non-potable water applications

Description

The Zurn Wilkins 975XLOSY Reduced Pressure Principle Backflow Preventer is a 1-1/2 inch assembly designed for high hazard non-potable water applications. It protects potable water supplies from contamination caused by backsiphonage and backpressure. Featuring a cast bronze body and OS&Y shut-off valves, its wye pattern allows for easy installation and in-line serviceability. The unit provides separate access to the relief valve and check valves, simplifying maintenance. It is ASSE® Listed 1013, UPC® Listed, and CSA B64.4 Classified, ensuring reliable performance and compliance.

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Connections

  • The Zurn Wilkins 975XLOSY features 1-1/2 inch FNPT (Female National Pipe Thread) connections on both the inlet and outlet.
  • It includes integrated OS&Y (Outside Stem and Yoke) shut-off valves, which provide a visual indication of whether the valve is open or closed.
  • These threaded connections are designed to connect to 1-1/2 inch MNPT (Male National Pipe Thread) piping.

Installation

For proper operation and code compliance, the assembly must be installed according to the manufacturer's instructions and local codes, such as the Uniform Plumbing Code. The unit should be mounted a minimum of 12 inches (305mm) and a maximum of 30 inches (762mm) above adequate drains, ensuring sufficient side clearance for testing and maintenance. It is crucial that no part of the unit can be submerged during installation or operation.

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Additional Details

The Zurn Wilkins Model 975XLOSY Reduced Pressure Principle Backflow Preventer is designed to provide high hazard protection for non-potable water applications, safeguarding potable water supplies from backsiphonage and backpressure of contaminated water.

This assembly is furnished with OS&Y (Outside Stem and Yoke) shut-off valves and features a wye pattern design that simplifies installation and maintenance in compact spaces, while the cast bronze body allows separate access to the relief valve and each check valve for reduced labor and repair time. For use in non-potable applications only.

Key Features

  • Wye pattern design for reduced installation time and costs
  • Separate access to relief valve and each check valve for easier maintenance
  • Entire unit is serviceable in line without removing the device
  • Provided with OS&Y valve shutoffs for reliable control
  • Tried and true design favored by installers worldwide

Construction Materials

  • Main Valve Body: Cast Bronze (ASTM B 584)
  • Access Covers: Cast Bronze (ASTM B 584)
  • Fasteners: Stainless Steel, 300 Series
  • Elastomers: Silicone
  • Polymers: Noryl™
  • Springs: Stainless Steel, 300 Series

Specifications

  • Size: 1-1/2 inch
  • Main Valve Body: Cast Bronze (ASTM B 584)
  • Access Covers: Cast Bronze (ASTM B 584)
  • Fasteners: Stainless Steel, 300 Series
  • Elastomers: Silicone
  • Polymers: Noryl™
  • Springs: Stainless Steel, 300 Series

Performance

  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 180°F
  • Hydrostatic Test Pressure: 350 PSI
  • End Connections: Threaded (FNPT OSY x FNPT OSY)

Certificates & Approvals

  • ASSE® Listed 1013
  • UPC® Listed
  • IAPMO® Listed
  • UL Classified (less shut-off valves or with OS&Y valves)
  • C-UL® Classified
  • CSA® Classified
  • CSA B64.4
  • AWWA Compliant C511
  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • NYC MEA 425-89-VOL 3

FAQs

What is the primary use of the Zurn Wilkins 975XLOSY Backflow Preventer?

This backflow preventer is designed for high health hazard non-potable water applications to protect potable water systems from contamination due to backsiphonage and backpressure of dirty water.

What are the end connections for this 1-1/2 inch model?

This model features 1-1/2 inch FNPT (Female National Pipe Thread) connections on both ends, and it includes OS&Y (Outside Stem and Yoke) shut-off valves.

What materials are used in the construction of the Zurn Wilkins 975XLOSY?

The main valve body and access covers are made of cast bronze (ASTM B 584). Fasteners and springs are stainless steel, elastomers are silicone, and internal polymers are Noryl™.

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

The backflow preventer has a maximum working water pressure of 175 PSI and a maximum working water temperature of 180°F.

Are there specific installation requirements for the 975XLOSY?

Yes, local codes govern installation. The assembly should be mounted at a minimum of 12 inches (305mm) and a maximum of 30 inches (762mm) above adequate drains with sufficient side clearance for testing and maintenance. No part of the unit can be submerged.

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