8 994-NRS-FS

Item Number: F438064
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$29,161.50
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Product Type: Reduced Pressure Zone Assembly
  • Weight: 571.0 lb
  • Nominal Size: 8 inch
  • Body Material: Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Features: Flood sensor with SentryPlus Alert® technology
  • Valve Type: Non-Rising Stem (NRS) resilient seated gate valves
  • Certification: UL Classified, FM Approved
  • Lead Free: Contains less than 0.25% lead by weight

Description

This 8 inch WATTS Series 994-NRS-FS Reduced Pressure Zone Assembly Backflow Preventer protects potable water supplies from health hazard cross-connections by preventing backpressure and backsiphonage. Featuring a compact, short lay length stainless steel body and non-rising stem resilient seated gate valves, it simplifies installation and maintenance. An integrated flood sensor with SentryPlus Alert® technology detects excessive relief valve discharge, alerting personnel when paired with an add-on connection kit. Rated for 175 psi maximum working pressure and approved by UL, FM, AWWA, and CSA B64.4, this lead-free assembly ensures reliable performance.

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Intended Use

This Reduced Pressure Zone Assembly is designed for health hazard cross-connections, providing protection against backpressure and backsiphonage. Always ensure compliance with local authority having jurisdiction requirements for installation.

Flood Sensor Connectivity

  • The integrated flood sensor requires an add-on connection kit to be activated and communicate alerts.
  • Once activated, the flood sensor is compatible with Building Management Systems (BMS) and cellular network communication.
  • The sensor can integrate with a Sensor Control Monitor to deliver maintenance alerts to Building Automation Systems (BAS) via RS-485 Modbus or the Nexa® platform through Wi-Fi connectivity.
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Additional Details

This 8 inch lead free reduced pressure zone assembly backflow preventer helps stop the reverse flow of liquids due to backpressure or backsiphonage, where a potential health hazard exists. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs.

Key Features

  • Stainless steel construction provides long term corrosion resistance and maximum strength.
  • Stainless steel body is half the weight of competitive designs, reducing installation and shipping costs.
  • Short end-to-end dimensions make retrofit easy.
  • Bottom mounted relief valve reduces clearance requirements when installed against an outside wall.
  • Torsion spring check valves provide maximum flow at low pressure drop.
  • Thermoplastic and stainless steel check valves ensure trouble-free operation.
  • No special tools required for servicing.
  • Compact construction allows for smaller enclosures.
  • Stainless steel relief valve features a balanced rolling diaphragm to eliminate sliding seals and lower maintenance costs.
  • Includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • Flood alert feature is activated with an add-on sensor connection kit, compatible with BMS and cellular network communication.
  • Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa® platform by Wi-Fi connectivity.
  • Equipped with non-rising stem resilient seated gate valves.

An add-on connection kit is required to activate the flood sensor. Without the connection kit, the flood sensor is a passive component and does not communicate with any other device.

Specifications

  • Product Type: Reduced Pressure Zone Assembly
  • Nominal Size: 8 inch
  • Body Material: 300 Series Stainless Steel
  • Check Assembly Material: Noryl®
  • Gate Valve Type: Non-Rising Stem (NRS) Resilient Seated
  • Flood Sensor: Included with SentryPlus Alert® Technology
  • Lead Content: Less than 0.25% by weight (Lead Free)

Performance

  • Temperature Range: 33°F-110°F (0.5°C - 43°C)
  • Maximum Working Pressure: 175 psi (12.1 bar)

Certificates & Approvals

  • AWWA C511-92
  • CSA B64.4
  • UL Classified
  • FM Approved

FAQs

What is the primary function of the WATTS Series 994-NRS-FS backflow preventer?

Its primary function is to protect potable water supplies from contamination caused by backpressure or backsiphonage in health hazard cross-connection applications.

Is the 994-NRS-FS assembly easy to maintain?

Yes, it features a compact modular design with a single access cover, allowing for easy in-line repairs and simplified maintenance without special tools.

How does the integrated flood sensor work?

The flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. An add-on connection kit is required to activate the sensor for communication and alert delivery.

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

The main valve body and all internal metal parts are constructed from 300 Series stainless steel for long-term corrosion resistance and strength. The check assembly uses Noryl®.

What are the key certifications for this 8 inch backflow preventer?

This assembly is approved by UL Classified, FM Approved, AWWA C511-92, and CSA B64.4, ensuring it meets industry standards for safety and performance.

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