3 957N-QT

Item Number: 0111669
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$10,148.55
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Weight: 120.0 lb
  • Housing and Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Shutoff Valves: Quarter-Turn Ball Valves
  • Maximum Working Pressure: 175 PSI
  • Lead Content: Less than 0.25% by weight
  • Temperature Range: 33°F - 140°F
  • Compact, lightweight design
  • Approved for Horizontal N-pattern installation

Description

This Watts Series 957 Reduced Pressure Zone (RPZ) backflow preventer is a 3-inch assembly designed to protect potable water systems from contamination due to backsiphonage and backpressure. It features a durable 304 stainless steel housing, quarter-turn ball valve shutoffs, and a compact design that is 70% lighter than traditional models. This Lead Free* assembly is suitable for continuous pressure piping applications and health hazard cross-connections, with a maximum working pressure of 175 PSI. It is approved for horizontal N-pattern installation, ensuring reliable water system integrity.

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Installation & Orientation

  • This assembly is approved for horizontal N-pattern installation. Ensure the backflow assembly is installed in accordance with the direction of the flow arrow for proper function.
  • The use of groove couplings facilitates integral pipeline adjustment and simplifies installation.
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Additional Details

This 3 inch reduced pressure zone assembly backflow preventer provides essential protection for potable water systems, preventing the reverse flow of fire protection substances and non-potable water due to backsiphonage or backpressure. It is designed to meet national plumbing codes and water authority requirements.

This assembly is approved for horizontal N-pattern installation and is suitable for continuous pressure piping applications and cross-connections identified as health hazards.

Construction & Features

  • Features a 304 (Schedule 40) stainless steel housing and sleeve.
  • Includes quarter-turn ball valve shutoffs for reliable operation.
  • Equipped with replaceable check disc rubber for easy maintenance.
  • Designed for unmatched ease of serviceability with patented torsion spring check modules.
  • Extremely compact design, allowing for smaller enclosure usage, and is 70% lighter than traditional designs.
  • Utilizes groove fittings for integral pipeline adjustment and ease of installation.
  • Features a bottom mounted cast stainless steel relief valve.
  • Wetted surfaces contain less than 0.25% lead by weight, making it a Lead Free* product.

Specifications

  • Size: 3 inch
  • Connection Type: Grooved couplings
  • Shutoff Valves: Quarter-turn ball valves
  • Orientation: N-Pattern (Horizontal)
  • Housing and Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Elastomers: EPDM, Silicone, Buna-N
  • Torsion Spring Checks Material: Noryl, Stainless Steel
  • Check Discs Material: Reversible Silicone or EPDM
  • Test Cocks Material: Lead Free Bronze Body
  • Pins and Fasteners Material: 300 Series Stainless Steel
  • Springs Material: Stainless Steel
  • Lead Content: Less than 0.25% by weight (wetted surface)
  • Temperature Range: 33°F – 140°F (0.5°C – 60°C)
  • Maximum Working Pressure: 175 PSI (12.1 bar)

Certificates & Approvals

  • Approved by FCCCHR-USC
  • AWWA C511-97
  • ASSE 1013
  • CSA B64.4
  • NSF Certified to NSF/ANSI 61-G

FAQs

What is the primary function of this backflow preventer?

This 3-inch reduced pressure zone assembly backflow preventer is designed to protect potable water systems by preventing the reverse flow of non-potable water or contaminants due to backsiphonage or backpressure, in accordance with national plumbing codes.

What are the key materials used in its construction?

The housing and sleeve are made from 304 (Schedule 40) stainless steel. It features EPDM, silicone, and Buna-N elastomers, and the test cocks are made from Lead Free bronze body.

What is the maximum operating pressure and temperature?

This backflow preventer has a maximum working pressure of 175 PSI (12.1 bar) and can operate within a temperature range of 33°F to 140°F (0.5°C to 60°C).

Is this product suitable for potable water applications?

Yes, the wetted surfaces of this product contain less than 0.25% lead by weight, making it a "Lead Free*" product suitable for potable water system protection in accordance with national plumbing codes.

What certifications does this backflow preventer hold?

It is approved by FCCCHR-USC, AWWA C511-97, ASSE 1013, CSA B64.4, and NSF Certified to NSF/ANSI 61-G, demonstrating compliance with industry standards.

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