4 4000SS-DNRS-FS

Item Number: F0692726
1 1
$10,263.44
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Ames
  • Nominal Pipe Size: 4 inch
  • Weight: 298.0 lb
  • Valve Type: Reduced Pressure Zone (RPZ)
  • Body Material: 300 Series Stainless Steel
  • Shutoff Valves: Domestic Non-Rising Stem (NRS)
  • Flood Detection: SentryPlus Alert® Sensor
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 110°F
  • Certifications: ASSE 1013, CSA B64.5

Description

This 4 inch Ames Fire & Waterworks Series 4000SS Reduced Pressure Zone (RPZ) backflow preventer safeguards potable water from contamination by preventing backflow from health-hazard cross-connections. Featuring a durable 300 Series stainless steel body and internal parts, it offers superior corrosion resistance and is lighter than comparable units. It includes domestic non-rising stem (NRS) gate valves and an integrated SentryPlus Alert® flood sensor for proactive discharge detection. Rated for 175 psi maximum working pressure and approved by ASSE 1013 and CSA B64.5, this assembly provides reliable, code-compliant water system protection.

Help Me Connect

Flood Sensor Activation & Connectivity

The integrated SentryPlus Alert® flood sensor requires an add-on connection kit (sold separately) to be fully activated and enable communication for alerts.

  • For Building Management Systems (BMS) or cellular network communication, specific connection kits are available.
  • For integration with Building Automation Systems (BAS), the Sensor Control Monitor enables connectivity via RS-485 Modbus or through the Nexa® platform by Wi-Fi connectivity.
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Additional Details

This 4 inch Ames Fire & Waterworks Series 4000SS Reduced Pressure Zone (RPZ) backflow preventer assembly is designed to protect potable water supplies from contamination due to backsiphonage and backpressure.

It is ideal for health-hazard cross-connections, preventing the reverse flow of non-potable water into the drinking water system in accordance with national codes.

Key Features

  • Stainless steel body construction provides long-term corrosion resistance and maximum strength, while being half the weight of competitive designs to reduce installation and shipping costs.
  • Features domestic non-rising stem resilient seated gate valves (NRS).
  • Includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • An add-on connection kit (sold separately) is required to activate the flood sensor, enabling alerts for potential flooding events via BMS, cellular communication, or the Sensor Control Monitor (BAS via RS-485 Modbus or Nexa® platform via Wi-Fi).
  • Patented cam-check assembly provides maximum flow at low pressure drop.
  • Compact construction and short end-to-end dimensions make retrofitting easy and allow for smaller enclosures.
  • Stainless steel relief valve features a balanced rolling diaphragm to eliminate sliding seals and lower maintenance costs.
  • No special tools are required for servicing.
  • Includes a single access cover for internal part accessibility and four ball type test cocks.

Specifications

  • Nominal Pipe Size: 4 inch
  • Valve Type: Reduced Pressure Zone (RPZ) Assembly
  • Main Valve Body Material: 300 Series Stainless Steel
  • Internal Metal Parts: 300 Series Stainless Steel
  • Check Assembly Material: Noryl®
  • Shutoff Valves: Domestic Non-Rising Stem (NRS) Resilient Seated Gate Valves
  • Flood Detection: SentryPlus Alert® Flood Sensor
  • Temperature Range: 33°F - 110°F (0.5°C – 43°C)
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Flange Dimension: AWWA Class D

Certificates & Approvals

  • ASSE 1013
  • CSA B64.5

FAQs

What is the primary function of this backflow preventer?

This 4 inch Ames Fire & Waterworks Series 4000SS Reduced Pressure Zone (RPZ) backflow preventer is designed to protect potable water supplies from contamination caused by backsiphonage and backpressure from health-hazard cross-connections.

What type of gate valves does this assembly include?

This assembly features domestic non-rising stem (NRS) resilient seated gate valves, which are designed for reliable shutoff and a compact footprint.

How does the flood sensor work and what is required to activate it?

The integrated SentryPlus Alert® flood sensor detects excessive water discharges from the relief valve. An add-on connection kit (sold separately) is required to activate the sensor and enable communication for alerts via BMS, cellular, Modbus, or Wi-Fi platforms.

What material is the main body of the backflow preventer made from?

The main valve body and all internal metal parts are constructed from 300 Series stainless steel, providing long-term corrosion resistance and maximum strength.

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

This backflow preventer is rated for a maximum working pressure of 175 psi (12.1 bar) and operates within a temperature range of 33°F to 110°F (0.5°C to 43°C).

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