4 957ZRPDA-OSY-GPM

Item Number: 0111652
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$13,786.76
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Nominal Pipe Size: 4 inch
  • Weight: 266.0 lb
  • Model: 957ZRPDA-OSY-GPM
  • Orientation: Horizontal Z-Pattern Installation
  • Maximum Working Pressure: 175 psi
  • Housing & Sleeve Material: 304 Stainless Steel
  • Shutoff Valves: UL/FM Approved OSY Resilient Seated Gate Valves
  • Features Gallons per Minute (GPM) meter
  • Includes flood sensor on relief valve

Description

This 4-inch Watts Series 957ZRPDA Reduced Pressure Detector Assembly is a backflow preventer designed to safeguard potable water supplies from contamination in fire protection systems. It prevents reverse flow due to backsiphonage or backpressure, complying with national plumbing codes. Key features include a durable 304 stainless steel housing, UL/FM Approved OSY resilient seated gate valves, and grooved fittings for easy installation. This compact, Z-pattern oriented unit is 70% lighter than traditional designs and includes a gallon per minute meter for leak detection and a flood sensor for discharge alerts. Item number 0111652.

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Connections

  • This assembly features grooved end connections, allowing for easy installation and integral pipeline adjustment with compatible grooved piping systems.
  • The outside stem and yoke (OSY) gate valves are designed for reliable operation and are UL Classified and FM Approved.
  • The Z-pattern orientation indicates how the unit is configured for horizontal installation in the piping system.
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Additional Details

This Watts Series 957ZRPDA Reduced Pressure Detector Assembly is a 4-inch backflow preventer designed to protect potable water systems from contamination due to backsiphonage and backpressure, specifically in fire protection systems.

It prevents the reverse flow of non-potable substances into the water supply, meeting national plumbing codes and water authority requirements. This assembly is approved for horizontal Z-pattern installation.

WARNING: It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Before installing, consult your local water authority, building, and plumbing codes.

Key Features

  • Extremely compact design that is 70% lighter than traditional models, allowing for smaller enclosures.
  • Constructed with a 304 (Schedule 40) stainless steel housing and sleeve for durability.
  • Features UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves.
  • Groove fittings facilitate integral pipeline adjustment and ease of installation.
  • Patented torsion spring check modules provide lowest pressure loss and unmatched ease of serviceability.
  • Includes a metered bypass with a gallon per minute meter to detect underground leaks and unauthorized water use from the fire sprinkler system.
  • Bottom-mounted cast stainless steel relief valve.
  • Equipped with a flood sensor on the relief valve to detect excessive water discharges and alert facility personnel.
  • Reversible silicone or EPDM check disc rubber for extended life.

Specifications

  • Nominal Pipe Size: 4 inch
  • Product Type: Reduced Pressure Detector Assembly
  • Model: 957ZRPDA-OSY-GPM
  • Orientation: Z-Pattern
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F - 140°F (0.5°C - 60°C)

Materials

  • Housing & Sleeve: 304 (Schedule 40) Stainless Steel
  • Elastomers: EPDM, Silicone, Buna 'N'
  • Torsion Spring Checks: Noryl®, Stainless Steel
  • Check Discs: Reversible Silicone or EPDM
  • Test Cocks Body: Lead Free* Bronze
  • Pins & Fasteners: 300 Series Stainless Steel
  • Springs: Stainless Steel

Certificates & Approvals

  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • AWWA C511-97
  • ASSE 1047
  • CSA B64.4
  • UL Classified (**OSY Only)
  • FM Approved (**OSY Only)

FAQs

What is the primary purpose of the Watts 957ZRPDA Reduced Pressure Detector Assembly?

The primary purpose is to protect potable water systems from contamination caused by back-siphonage and backpressure, especially in fire protection systems, ensuring compliance with national plumbing codes.

What type of installation is this backflow preventer suitable for?

This backflow preventer is approved for horizontal Z-pattern installation. Its compact design also allows for use in smaller enclosures.

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

The housing and sleeve are constructed from 304 (Schedule 40) stainless steel. Internal components feature EPDM, silicone, and Buna 'N' elastomers, Noryl® torsion spring checks, and Lead Free* bronze test cocks.

Does this model include a water meter for monitoring?

Yes, this assembly is furnished with a metered bypass that includes a gallon per minute (GPM) meter to detect underground leaks and unauthorized water usage from the fire sprinkler system.

What shutoff valves are included with this assembly?

This model includes UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves for reliable isolation.

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