6 957ZRPDA-OSY-GPM

Item Number: 0111653
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$20,554.53
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Nominal Size: 6 inch
  • Weight: 463.0 lb
  • Body Material: 304 (Schedule 40) Stainless Steel
  • Maximum Working Pressure: 175 PSI
  • Installation: Horizontal Z-Pattern
  • Shutoff Valves: OSY Resilient Seated Gate Valves
  • Bypass Meter: Gallon per Minute (GPM)
  • Approvals: ASSE 1047, CSA B64.4, UL Classified, FM Approved
  • Design: Extremely compact and 70% lighter

Description

The Watts 6 inch 957RPDA Reduced Pressure Detector Assembly Backflow Preventer is engineered to safeguard potable water systems from contamination due to back-siphonage or backpressure, commonly found in fire protection systems. Constructed with 304 stainless steel housing, it features a compact and lightweight design approved for horizontal Z pattern installations. Key components include OSY resilient seated gate valves, a bottom-mounted relief valve, and a gallon per minute bypass meter for leak detection. It also includes a flood sensor for discharge monitoring. This assembly is ASSE 1047, CSA B64.4, UL Classified, and FM Approved, ensuring reliable performance up to 175 PSI.

Help Me Connect

Connections and Installation

  • This assembly features groove fittings designed for integral pipeline adjustment and ease of installation.
  • The product is approved for horizontal Z pattern installation.
  • Shutoff valves are grooved butterfly valve shutoffs, designed to integrate seamlessly into grooved piping systems.
  • The built-in flood sensor requires an add-on connection kit for activation and communication with Building Management Systems (BMS) or cellular networks. Without this kit, the sensor functions as a passive component.
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Additional Details

The Watts 6 inch Series 957RPDA Reduced Pressure Detector Assembly Backflow Preventer is designed to protect potable water systems from contamination due to back-siphonage or backpressure from fire protection substances and non-potable water.

This assembly prevents the reverse flow of water in accordance with national plumbing codes and water authority requirements, making it ideal for health hazard cross-connections.

Primary Use

  • Prevents contamination in potable water systems.
  • Protects against back-siphonage and backpressure.
  • Monitors unauthorized water use in fire protection systems.
  • Ideal for cross-connections identified as health hazards, such as fire sprinkler systems.

Features

  • Extremely compact design and 70% lighter than traditional designs.
  • Approved for horizontal Z pattern installation.
  • 304 (Schedule 40) stainless steel housing and sleeve for durability.
  • Groove fittings allow integral pipeline adjustment and ease of installation.
  • Patented torsion spring check modules provide lowest pressure loss and unmatched ease of serviceability.
  • Replaceable check disc rubber.
  • Available with grooved butterfly valve shutoffs (OSY).
  • Bottom mounted cast stainless steel relief valve.
  • Metered bypass with a gallon per minute meter detects leakage or theft of water.
  • Includes a flood sensor on the relief valve to detect excessive water discharges.
  • Flood alert feature activated with an add-on sensor connection kit, compatible with BMS and cellular network communication.

Components

  • Stainless steel body with quick access sleeve.
  • Torsion spring check valves.
  • Resilient seated gate valves with outside stem and yoke (OSY).
  • Test cocks.
  • Corrosive resistant bottom mounted pressure relief valve.
  • Gallon per minute meter.
  • Flood sensor on relief valve.

A 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 standard material product, consult your local water authority, building and plumbing codes.

Specifications

General

  • Brand: Watts
  • Series: 957RPDA
  • Product Type: Reduced Pressure Detector Assembly
  • Nominal Size: 6 inch
  • Installation Pattern: Horizontal Z-Pattern
  • Meter Type: Gallon per Minute (GPM)

Materials

  • Housing & Sleeve: 304 (Schedule 40) Stainless Steel
  • Elastomers: EPDM, Silicone, Buna 'N'
  • Relief Valve Body: Noryl®
  • Relief Valve Components: Stainless Steel
  • Shutoff Valves: Resilient Seated Gate Valves (OSY)
  • Check Discs: EPDM
  • Test Cocks: Lead Free* Bronze
  • Pins & Fasteners: 300 Series Stainless Steel
  • Springs: Stainless Steel

Performance

  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Temperature Range: 33°F – 140°F (0.5°C – 60°C)

Certificates & Approvals

  • ASSE: 1047
  • CSA: CSA B64.4
  • UL: Classified
  • FM: Approved (BFG & OSY Only)
  • AWWA: C511-97

FAQs

What is the primary function of the Watts 957RPDA assembly?

The primary function is to protect potable water systems from contamination caused by back-siphonage or backpressure, especially in health hazard cross-connections like fire sprinkler systems. It prevents the reverse flow of non-potable substances.

What type of installation is this backflow preventer suitable for?

This Watts 957RPDA assembly is approved for horizontal Z pattern installations. Its compact design also allows for use in smaller enclosures.

What materials are used in the construction of the Watts 957RPDA?

The housing and sleeve are made from 304 (Schedule 40) stainless steel. It features EPDM, silicone, and Buna 'N' elastomers, Noryl® relief valve components, and 300 Series stainless steel pins, fasteners, and springs.

How does the assembly help detect water leakage or unauthorized use?

The assembly is equipped with a metered bypass, including a gallon per minute (GPM) meter. This allows for the detection of underground leaks or unauthorized water usage from the fire sprinkler system.

What is the purpose of the flood sensor on the relief valve?

The flood sensor detects excessive water discharges from the relief valve, signaling facility personnel for corrective action to limit flooding and damage. An add-on connection kit is required to activate its communication features with BMS or cellular networks.

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