3 994-NRS-FS

Item Number: F437804
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$9,142.51
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 3 inch
  • Weight: 226.0 lb
  • Body Material: 300 Series stainless steel
  • Shutoff Valves: Non-rising stem (NRS) resilient seated gate valves
  • Maximum Working Pressure: 175 psi
  • Flood Sensor: SentryPlus Alert® technology for discharge detection
  • Lead Content: Less than 0.25% by weight on wetted surfaces
  • Maintenance: No special tools required for servicing
  • Compact modular design for easy installation

Description

This 3 inch Watts Series 994 Reduced Pressure Zone (RPZ) backflow preventer offers robust protection for potable water supplies against health hazard cross-connections. Featuring a durable 300 Series stainless steel body and non-rising stem (NRS) resilient seated gate valves, it ensures reliable operation. An integrated SentryPlus Alert® flood sensor detects excessive relief valve discharge, relaying alerts when paired with an add-on connection kit. Its compact design, short lay length, and tool-free maintenance simplify installation and servicing. Certified by AWWA, CSA, UL, and ASSE, it provides peace of mind for critical water system protection. Item number F437804.

Help Me Connect

Flood Sensor Connectivity

  • The flood sensor on this backflow preventer requires an add-on connection kit to activate and relay alerts for potential flooding events.
  • Connection kit options include those compatible with BMS (Building Management Systems) and cellular communication.
  • The Sensor Control Monitor connection kit enables integration with BAS (Building Automation Systems) via RS-485 Modbus or with the Nexa® platform through Wi-Fi connectivity.

Drainage and Air Gap

  • Watts recommends installing a drain line and the required 994AGK-P air gap for proper drain line installation.
  • When installing an air gap, the air gap brackets attach directly onto the flood sensor.
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Additional Details

This 3 inch lead free reduced pressure zone assembly backflow preventer is designed to help stop the reverse flow of liquids due to backpressure or backsiphonage, especially where potential health hazards exist.

Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs, and it features a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.

Features

  • Flood sensor with SentryPlus Alert® technology detects continuous discharge from the relief valve
  • Add-on sensor connection kit extends flood monitoring on compatible assemblies
  • Integrates with the Sensor Control Monitor to deliver maintenance alerts to BMS via RS-485 Modbus or the Nexa® platform by Wi-Fi connectivity
  • Stainless steel body 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
  • Non-rising stem resilient seated gate valves
  • 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 for 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
  • The wetted surface of this product contacted by consumable water contains less than one quarter of one percent (0.25%) of lead by weight.

Specifications

  • Size: 3 inch
  • Body Material: 300 Series stainless steel
  • Internal Metal Parts: 300 Series stainless steel
  • Check Assembly: Noryl®
  • Shutoff Valves: Non-rising stem (NRS) resilient seated gate valves
  • Relief Valve: Stainless steel, bottom mounted, rolling diaphragm
  • Test Cocks: Four ball-type
  • Temperature Range: 33°F-110°F (0.5°C - 43°C) continuous
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Lead Content: Wetted surface contains less than 0.25% lead by weight

Certificates & Approvals

  • AWWA C511-92
  • CSA B64.5
  • UL Classified
  • ASSE 1013
  • Approved by the Foundation for Cross Connection Control & Hydraulic Research at the University of Southern California, sizes 2 1/2" to 6"

FAQs

What is the primary purpose of this Watts Series 994 Reduced Pressure Zone (RPZ) assembly?

This 3-inch lead-free Watts Series 994 RPZ assembly is designed to protect potable water supplies from health hazard cross-connections, preventing the reverse flow of hazardous liquids due to backpressure or backsiphonage.

How does the integrated flood sensor function?

The flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. When paired with an add-on connection kit, it activates to relay alerts to facility personnel, helping to prevent costly flooding.

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 corrosion resistance. The check assembly is made of Noryl®.

What type of shutoff valves are included with this assembly?

This assembly includes non-rising stem (NRS) resilient seated gate valves, which offer reliable flow control and are suitable for applications where space is a concern.

Does this Watts Series 994 RPZ assembly require special tools for servicing?

No, this assembly is designed for easy maintenance without requiring any special tools for servicing. Its compact modular design allows for in-line repairs via a single access cover.

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