2.5 4000SS-NRS-FS

Item Number: F0690479
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$6,839.24
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Ames
  • 2 1/2 inch Reduced Pressure Zone Backflow Preventer
  • Weight: 210.0 lb
  • Lead Free: Yes (wetted surface less than 0.25% lead)
  • Body Material: 300 Series Stainless Steel
  • Shutoff Valves: Non-Rising Stem (NRS)
  • Flood Sensor: SentryPlus Alert® technology for discharge detection
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 110°F
  • Approvals: ASSE 1013, CSA B64.5

Description

The Ames 2 1/2 inch 4000SS-NRS-FS is a lead-free reduced pressure zone backflow preventer assembly designed to protect potable water supplies from hazardous cross-connections, preventing reverse flow due to backsiphonage or backpressure. It features a durable 300 Series stainless steel body for corrosion resistance and includes Non-Rising Stem (NRS) shutoff valves. An integrated SentryPlus Alert® flood sensor detects continuous relief valve discharge, enhancing system safety. With a maximum working pressure of 175 psi and compact design, it offers reliable performance and easy maintenance. Approved by ASSE 1013 and CSA B64.5. Item number F0690479.

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Flood Sensor Connectivity

  • To activate the integrated flood sensor, an add-on connection kit is required.
  • Without a connection kit, the flood sensor operates as a passive component with no external communication.
  • Compatible connection kit options include Building Management Systems (BMS), cellular communication, and the Sensor Control Monitor.
  • The Sensor Control Monitor enables integration with Building Automation Systems (BAS) via RS-485 Modbus or with the Nexa® platform through Wi-Fi connectivity.
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Additional Details

This 2 1/2 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and/or backpressure. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards.

Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. This assembly includes resilient seated shutoff valves with a non-rising stem (NRS) and a patented cam-check assembly for maximum flow at low pressure drop.

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 retrofitting easy.
  • Cam-check assembly provides maximum flow at low pressure drop.
  • No special tools required for servicing.
  • Compact construction allows for smaller enclosures and easy in-line repairs.
  • Stainless steel relief valve features a balanced rolling diaphragm to eliminate sliding seals and lower maintenance costs.
  • Integrated flood sensor with SentryPlus Alert® technology to detect continuous discharge from the relief valve.
  • Flood alert feature 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.

Materials

  • All internal metal parts: 300 Series stainless steel
  • Main valve body: 300 Series stainless steel
  • Check assembly: Noryl®

Use of the flood sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including the need to provide proper drainage in the event of a discharge. The information contained herein is not intended to replace the full product installation and safety information available or the experience of a trained product installer. You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this product.

Specifications

  • Valve Size: 2 1/2 inch
  • Body Material: 300 Series Stainless Steel
  • Check Assembly Material: Noryl®
  • Shutoff Valves: Non-Rising Stem (NRS)
  • Lead Free: Yes (wetted surface contains less than 0.25% lead by weight)

Performance

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

Dimensions (approximate)

  • Dimension A (End-to-End): 37 inches (940 mm)
  • Dimension C (NRS): 9 3/8 inches (238 mm)
  • Dimension D: 10 1/2 inches (267 mm)
  • Dimension G: 10 inches (254 mm)
  • Dimension L: 22 inches (559 mm)
  • Dimension M: 10 inches (254 mm)
  • Dimension N: 6 1/2 inches (165 mm)
  • Dimension P: 7 inches (178 mm)

Weight (approximate)

  • Weight with Gates: 148 lbs (67 kg)
  • Weight without Gates: 60 lbs (27 kg)

Certificates & Approvals

  • ASSE: 1013
  • CSA: B64.5
  • AWWA: C511-92

FAQs

What is the primary function of the 2 1/2 inch 4000SS-NRS-FS backflow preventer?

This reduced pressure zone backflow preventer protects potable water supplies by preventing the reverse flow of hazardous materials due to backsiphonage or backpressure. It is suitable for health-hazard cross-connections in continuous pressure piping applications.

Is this backflow preventer lead-free?

Yes, the wetted surface of this product that contacts consumable water contains less than 0.25% of lead by weight, complying with lead-free requirements for safe water systems.

What type of shutoff valves does this assembly use?

The 4000SS-NRS-FS model features Non-Rising Stem (NRS) resilient seated shutoff valves. These valves offer a compact profile, ideal for installations where space is a consideration.

How does the integrated flood sensor work?

The integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. When paired with an add-on connection kit, it can relay alerts to facility personnel or building management systems for proactive response.

What are the key materials 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 superior corrosion resistance and strength. The cam-check assembly is made from Noryl®.

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