6 4000SS-NRS-FS

Item Number: F0690507
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$15,628.40
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Ames
  • Nominal Size: 6 inch
  • Weight: 470.0 lb
  • Body Material: 300 Series Stainless Steel
  • Shutoff Valves: Non-Rising Stem (NRS)
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F - 110°F
  • Features SentryPlus Alert® flood sensor
  • Lead Free construction (less than 0.25% lead by weight)
  • Lightweight design for reduced installation costs

Description

This 6-inch Ames Fire & Waterworks 4000SS reduced pressure zone backflow preventer assembly safeguards potable water from contamination. Designed for health-hazard cross-connections, it prevents backsiphonage and backpressure with its stainless steel body, non-rising stem shutoff valves, and patented cam-check assembly. The lightweight, short lay-length design simplifies installation and retrofitting. A key feature is the integrated SentryPlus Alert® flood sensor, which detects excessive relief valve discharge and can activate alerts with an optional connection kit. This lead-free unit operates up to 175 PSI across a 33°F to 110°F temperature range. Item number F0690507.

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Connectivity & Alerts

  • This backflow preventer includes a flood sensor with SentryPlus Alert® technology to detect excessive relief valve discharge.
  • To activate the flood sensor's alert features, an add-on connection kit is required.
  • Connection kit options include interfaces for Building Management Systems (BMS), cellular communication, or 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.
  • Without an add-on connection kit, the flood sensor functions as a passive component without external communication.
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Additional Details

This 6 inch lead free reduced pressure zone backflow preventer assembly is engineered to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply, protecting against backsiphonage and backpressure.

It features a compact, modular design with a single access cover for streamlined in-line maintenance.

Key Features

  • Lead Free construction compliant with national codes (wetted surface contains less than 0.25% lead).
  • Lightweight stainless steel body, approximately half the weight of competitive designs, which reduces installation and shipping costs.
  • Short end-to-end dimensions facilitate easy retrofitting.
  • Patented cam-check assembly ensures maximum flow with low pressure drop.
  • Stainless steel relief valve with a balanced rolling diaphragm eliminates sliding seals and lowers maintenance costs.
  • Integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve.
  • Flood alert feature is activated with an add-on sensor connection kit, compatible with BMS, cellular communication, and the Sensor Control Monitor for integration with BAS via RS-485 Modbus or Nexa® platform via Wi-Fi.
  • No special tools required for servicing.
  • Compact construction allows for installation in smaller enclosures.

Components

  • The assembly includes two resilient seated non-rising stem (NRS) shutoff valves.
  • Four ball type test cocks are provided for comprehensive testing.
  • A corrosive-resistant stainless steel relief valve is bottom-mounted.
  • All internal metal parts are constructed from 300 Series stainless steel for corrosion resistance.
  • The check assembly is made of Noryl® thermoplastic with stainless steel hinge pins and cam arms.

Important Safety Notice: An add-on connection kit is required to activate the flood sensor's alert features; without it, the sensor is passive. Watts® is not responsible for alert failures due to connectivity issues, power outages, or improper installation. Always read all installation instructions and consult governing authorities for local requirements before installation.

Specifications

General

  • Product Type: Reduced Pressure Zone Backflow Preventer
  • Nominal Size: 6 inch
  • Body Material: 300 Series Stainless Steel
  • Check Assembly Material: Noryl® with stainless steel components
  • Shutoff Valves: Non-Rising Stem (NRS) Resilient Seated Gate Valves
  • Lead Content: Wetted surface contacted by consumable water contains less than 0.25% lead by weight
  • Flange Dimension: AWWA Class D

Performance

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

Dimensions (Approximate)

  • Length (A): 48 1/2 inches (1232 mm)
  • Length (C, NRS): 30 1/8 inches (765 mm)
  • Width (D): 16 inches (406 mm)
  • Height (G): 11 1/2 inches (292 mm)
  • Length (L): 15 inches (381 mm)
  • Width (M): 27 1/2 inches (699 mm)
  • Height (N): 18 1/2 inches (470 mm)
  • Width (P): 13 1/2 inches (343 mm)
  • Weight (with gates): 380 lbs (172 kg)

Certificates & Approvals

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

FAQs

What type of backflow prevention does this assembly provide?

This is a Reduced Pressure Zone (RPZ) backflow preventer, designed to protect potable water supplies from both backsiphonage and backpressure of hazardous materials or non-potable water.

Does this backflow preventer include a flood sensor?

Yes, it includes an integrated flood sensor with SentryPlus Alert® technology to detect excessive water discharge from the relief valve. An add-on connection kit is required to enable active alerts.

What are the shutoff valves on this 6-inch assembly?

This 6-inch assembly is equipped with non-rising stem (NRS) resilient seated gate valves, providing reliable shutoff control.

What is the maximum operating pressure and temperature range for this unit?

The maximum working pressure for this backflow preventer is 175 PSI, and it operates effectively within a temperature range of 33°F to 110°F (0.5°C to 43°C).

Is this product lead-free?

Yes, the wetted surface of this product that contacts consumable water contains less than 0.25% lead by weight, making it compliant with lead-free installation requirements.

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