10 957NRPDA-OSY-GPM

Item Number: 0111643
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$35,483.93
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 10 inch
  • Weight: 1164.0 lb
  • Housing Material: 304 Stainless Steel
  • Shutoff Valves: OSY Resilient Seated Gate Valves
  • Maximum Working Pressure: 175 psi
  • Installation: Horizontal N-pattern
  • Flood Sensor: Included, requires add-on kit
  • Bypass: Metered, Gallon Per Minute
  • Approvals: ASSE 1047, CSA B64.4, UL, FM

Description

The Watts 10 inch Series 957RPDA Reduced Pressure Detector Assembly Backflow Preventer is engineered to protect potable water systems from contamination due to back-siphonage and backpressure. Featuring a compact and lightweight 304 stainless steel housing, it includes UL and FM Approved OSY resilient seated gate valves and a metered bypass for leak detection. This unit is approved for horizontal N-pattern installation and incorporates a flood sensor for discharge monitoring. With a maximum working pressure of 175 psi and a temperature range of 33°F to 140°F, it is ideal for health hazard applications and fire protection systems, complying with national plumbing codes and several certifications.

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Connections and Installation

  • This Watts 957RPDA backflow preventer features grooved inlet and outlet connections for ease of installation and integral pipeline adjustment.
  • It is designed for horizontal N-pattern installation.
  • The integrated flood sensor requires an add-on sensor connection kit to activate its flood alert capabilities, enabling compatibility with BMS and cellular network communication systems.
  • Always consult local water authority, building, and plumbing codes before installation to ensure compliance.
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Additional Details

The Watts 10 inch Series 957RPDA Reduced Pressure Detector Assembly Backflow Preventer provides protection against contamination of potable water systems from back-siphonage and backpressure, commonly used in health hazard applications and for monitoring unauthorized water use in fire protection systems.

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, consult your local water authority, building, and plumbing codes.

Features

  • Extremely compact design, significantly lighter than traditional backflow preventers.
  • Housing and sleeve constructed from 304 (Schedule 40) stainless steel for durability.
  • Groove fittings for easy integral pipeline adjustment during installation.
  • Patented torsion spring check modules ensure the lowest pressure loss and unmatched ease of serviceability.
  • Includes UL Classified and FM Approved outside stem and yoke (OSY) resilient seated gate valves.
  • Bottom mounted cast stainless steel relief valve.
  • Metered bypass system detects leakage or unauthorized water use from the fire sprinkler system.
  • Integrated flood sensor on the relief valve to detect excessive water discharges.
  • Flood alert feature can be activated with an add-on sensor connection kit for BMS and cellular network communication.
  • Replaceable check disc rubber for easy maintenance.

Design and Performance

  • Designed for horizontal N-pattern installation.
  • Ensures drip-tight closure against reverse flow.
  • Includes a gallon per minute meter for bypass monitoring.

Specifications

General

  • Product Type: Reduced Pressure Detector Assembly Backflow Preventer
  • Model: 957RPDA
  • Size: 10 inch
  • Installation Pattern: N-pattern (Horizontal)
  • Valve Type: Outside Stem and Yoke (OSY) Gate Valves
  • Bypass: Metered with Gallon Per Minute (GPM) meter
  • Flood Sensor: Yes, requires add-on connection kit for activation

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: Lead Free* Bronze Body
  • 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
  • AWWA C511-97
  • CSA B64.4
  • UL Classified (**BFG & OSY Only)
  • FM Approved (**BFG & OSY Only)
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at USC (FCCCHR-USC)

FAQs

What is the primary purpose of the Watts 957RPDA backflow preventer?

The primary purpose is to protect potable water systems from contamination caused by back-siphonage and backpressure, especially in health hazard applications and to monitor water usage in fire protection systems.

What are the key materials used in the construction of this backflow preventer?

The housing and sleeve are constructed from 304 (Schedule 40) stainless steel. Elastomers include EPDM, silicone, and Buna 'N', while torsion spring checks are Noryl® and stainless steel.

Does this model include a flood sensor, and how is it activated?

Yes, this model includes a flood sensor on the relief valve to detect excessive water discharges. To activate its flood alert capabilities for BMS or cellular network communication, an add-on sensor connection kit is required.

What certifications and approvals does the Watts 957RPDA hold?

The Watts 957RPDA is ASSE 1047, AWWA C511-97, and CSA B64.4 approved. It is also UL Classified and FM Approved for models with BFG & OSY shutoff valves.

What are the maximum operating pressure and temperature range for this device?

This backflow preventer has a maximum working pressure of 175 psi (12.1 bar) and an operating temperature range of 33°F to 140°F (0.5°C to 60°C).

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