4 LF880-W-DNRS-FS

Item Number: F8007364
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$13,209.00
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Febco
  • Nominal Size: 4 inch
  • Weight: 445.0 lb
  • Body Material: Ductile Iron Grade 65-45-12
  • Shutoff Valves: Domestic NRS resilient wedge gate valve
  • Coating: ArmorTek epoxy corrosion resistant
  • Relief Valve Seat: Stainless steel
  • Maximum Working Pressure: 175 psi
  • Flood Detection: SentryPlus Alert® technology
  • Approvals: ASSE 1013, UL, FM, CSA B64.4

Description

This 4 inch Lead Free MasterSeries® Reduced Pressure Zone Backflow Preventer Assembly safeguards industrial water services from high hazard (toxic) fluids. Featuring a ductile iron body with ArmorTek® epoxy coating and domestic Non-Rising Stem shutoff valves, it offers superior corrosion resistance and durability. The design accommodates a longer lay-length for direct drop-in replacement of competitor N-pattern valves and allows vertical up or down installation. Integrated SentryPlus Alert® technology provides flood detection through an add-on connection kit for remote monitoring via BMS, cellular, or Wi-Fi. It is ASSE 1013, UL, FM, and CSA B64.4 approved, ensuring reliability and compliance.

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Installation Flexibility

  • Designed with a longer lay-length for direct drop-in replacement of competitor’s N-pattern valves.
  • Supports both vertical up and vertical down N-pattern installation configurations.

Connectivity for Monitoring

This backflow preventer includes an integrated flood sensor with SentryPlus Alert® technology. To activate and relay flood detection alerts, an add-on connection kit is required. Connection kit options enable integration with:

  • Building Management Systems (BMS)
  • Cellular communication networks
  • Sensor Control Monitor for integration with BAS via RS-485 Modbus or the Nexa® platform via Wi-Fi

End Connections

  • End connections are compliant to ASME B16.1 Class 125 and AWWA Class D Flange standards.
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Additional Details

This 4 inch Lead Free MasterSeries® Reduced Pressure Zone Backflow Preventer Assembly is designed to protect water services to industrial installations and applications from high hazard (toxic) fluids. It features a longer lay-length for direct drop-in replacement of competitor’s N-pattern valves.

Key Features

  • Lead Free construction
  • Domestic Non-Rising Stem (NRS) shutoff valves
  • ArmorTek® epoxy coating technology on ductile iron body for superior corrosion resistance
  • Stainless steel relief valve seat and stainless steel check components for maximum performance and durability
  • Integrated flood sensor with SentryPlus Alert® technology to detect excessive relief valve discharge
  • Compatible with add-on connection kits for BMS, cellular, or Sensor Control Monitor integration for remote alerts via RS-485 Modbus or Wi-Fi
  • Inline serviceable assembly with no special tools required for maintenance
  • Options for vertical up or vertical down N-pattern installation
  • Field reversible relief valve, reversible and replaceable discs, and field replaceable seats

NOTICE: The flood sensor requires an add-on connection kit to activate and relay alerts for potential flooding events. Without the connection kit, the flood sensor is a passive component and does not communicate flood detection information.

NOTICE: Use of the flood sensor does not replace the need to comply with all required instructional codes, regulations, installation, operation, and maintenance procedures for this product, including proper drainage for discharge events.

NOTICE: Watts is not responsible for alert failures caused by connectivity issues, power outages, or improper installation.

Specifications

  • Product Type: Reduced Pressure Zone Backflow Preventer
  • Nominal Size: 4 inch
  • SKU: F8007364

Materials

  • Main Valve Body: Ductile Iron Grade 65-45-12
  • Relief Valve Body: Ductile Iron Grade 65-45-12
  • Coating: ArmorTek epoxy coating
  • Shutoff Valves: Domestic NRS resilient wedge gate valve
  • Check Seats: Stainless steel
  • Relief Valve Seat: Stainless steel
  • Disc Holder: Stainless steel
  • Elastomer Disc: Silicone
  • Spring: Stainless steel
  • Clamp: AWWA C606

Performance Ratings

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Maximum Working Pressure (Relief Valve): 20 psi (1.4 bar)
  • Hydrostatic Test Pressure: 350 psi (24.1 bar)
  • Hydrostatic Safety Pressure: 700 psi (48.3 bar)
  • Temperature Range: 33°F – 140°F (0.5°C – 60°C) continuous

Certificates & Approvals

  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research (FCCCHR-ISC)
  • ASSE 1013 Listed
  • UL Classified (US & Canada)
  • FM Approved
  • IAPMO/cUPC
  • AWWA Standard C511 Compliant
  • CSA B64.4
  • End Connections: Compliant to ASME B16.1 Class 125 & AWWA Class D Flange

FAQs

What is the primary purpose of the 4 inch Lead Free MasterSeries® Reduced Pressure Zone Backflow Preventer Assembly?

This assembly is designed to protect industrial water services from contamination by high hazard (toxic) fluids, preventing backflow into the potable water supply.

What certifications and approvals does this backflow preventer hold?

It is ASSE 1013 Listed, UL Classified for US & Canada, FM Approved, IAPMO/cUPC, AWWA Standard C511 Compliant, and CSA B64.4. It is also approved by the FCCCHR-ISC.

What is the maximum operating pressure for this backflow preventer?

The maximum working pressure for this 4 inch assembly is 175 psi (12.1 bar) for the main valve and 20 psi (1.4 bar) for the relief valve.

How does the SentryPlus Alert® flood sensor function?

The integrated SentryPlus Alert® flood sensor detects excessive water discharge from the relief valve. To activate and relay these alerts, an add-on connection kit is required, which can integrate with BMS, cellular networks, or the Sensor Control Monitor for remote notifications.

What type of shutoff valves are included with this assembly?

This assembly comes with domestic Non-Rising Stem (NRS) resilient wedge gate valves that comply with AWWA C509 standards, and are UL Classified and FM Approved.

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