1 975XL RP, FNTP OSY X FNPT OSY

Item Number: 1-975XLOSY
1 1
$2,934.76
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Nominal Size: 1 inch
  • Maximum Working Pressure: 175 PSI
  • Maximum Working Temperature: 180°F
  • Main Body Material: Cast Bronze ASTM B 584
  • Includes OS&Y Shut-off Valves
  • ASSE® Listed 1013
  • CSA B64.4 Certified
  • Designed for non-potable applications only

Description

The Zurn Wilkins 975XL 1-inch Reduced Pressure Principle Backflow Preventer is engineered to protect non-potable water supplies from contamination due to backsiphonage and backpressure. Featuring a durable cast bronze body and integral OS&Y shut-off valves, this assembly is designed for reliable performance in applications where a health hazard exists. Its wye pattern and short lay length allow for easier installation in confined spaces, with all internal components accessible for in-line servicing. Approved to ASSE 1013 and CSA B64.4 standards, it safely handles up to 175 PSI at 180°F.

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Connections

  • This 1-inch backflow preventer features female NPT threaded end connections, suitable for connecting directly to corresponding 1-inch male NPT threaded pipes.
  • It is supplied with integral OS&Y (Outside Stem and Yoke) shut-off valves on both the inlet and outlet, allowing for isolation during maintenance or testing.

Installation Notes

  • Local codes govern installation requirements; refer to manufacturer's instructions and the latest edition of the Uniform Plumbing Code.
  • Mount the assembly a minimum of 12 inches (305mm) and a maximum of 30 inches (762mm) above adequate drains.
  • Ensure sufficient side clearance for testing and maintenance.
  • No part of the unit should be submerged during installation.
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Additional Details

The Zurn Wilkins 975XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for non-potable water applications, designed to prevent backsiphonage and backpressure of contaminated water into the potable water supply. This specific 1-inch model is furnished with OS&Y valve shutoffs for enhanced control and isolation.

Application

  • Designed for installation on water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water supply.
  • Provides protection where a potential health hazard exists.
  • For non-potable applications only.

Design & Features

  • Wye pattern design with short lay length eases installation in compact spaces.
  • Cast bronze body and access covers.
  • Separate access to the relief valve and each check valve for reduced labor costs and repair time.
  • Entire unit is serviceable in line.
  • Supplied with full port ball valves.
  • Includes OS&Y valve shutoffs.

Specifications

  • Nominal Size: 1 inch
  • End Connections: Threaded ANSI B1.20.1
  • Maximum Working Water Pressure: 175 PSI
  • Maximum Working Water Temperature: 180°F
  • Hydrostatic Test Pressure: 350 PSI
  • Relief Valve Discharge Port (3/4" - 1" models): 0.63 sq. in.

Materials

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

Certificates & Approvals

  • ASSE® Listed 1013
  • CUPC® Listed
  • UL® Classified (with OS&Y valves)
  • C-UL® 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-M VOL 3

FAQs

What is the primary purpose of the Zurn Wilkins 975XL?

Its primary purpose is to protect water lines from contamination caused by backsiphonage and backpressure of polluted water into the potable water supply. It is specifically designed for non-potable water applications.

What are the maximum operating pressure and temperature ratings for this backflow preventer?

The Zurn Wilkins 975XL has a maximum working water pressure of 175 PSI and a maximum working water temperature of 180°F.

What materials are used for the main components of this device?

The main valve body and access covers are made from Cast Bronze ASTM B 584. Fasteners and springs are Stainless Steel, 300 Series, while elastomers are Silicone and Buna Nitrile, and polymers are Noryl™.

Does this 975XL model include shut-off valves?

Yes, this specific 975XL model comes equipped with full port OS&Y (Outside Stem and Yoke) shut-off valves on both the inlet and outlet for complete isolation.

What certifications and approvals does the 975XL hold?

The 975XL is ASSE® Listed 1013, CUPC® Listed, UL® Classified (with OS&Y valves), C-UL® Classified, CSA B64.4 Certified, and AWWA compliant C511.

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