1 LF919-QT-S-FS

Item Number: F065379
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$1,781.26
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • 1 inch Lead-Free Reduced Pressure Zone Backflow Preventer
  • SentryPlus Alert flood sensor detects relief valve discharge
  • Integrates with Sensor Control Monitor for maintenance alerts
  • Lead-free bronze body with NPT end connections
  • Quarter turn ball valve shutoffs with tee handles
  • Two poppet style check valves with replaceable seats
  • Compact design with separate access covers
  • Top-mounted, screwdriver-slotted test cocks

Description

The Watts 1 inch Lead Free Reduced Pressure Zone Backflow Preventer assembly features SentryPlus Alert technology to detect continuous relief valve discharge. Designed to protect potable water from pollution due to backsiphonage or backpressure, this unit is ideal for continuous pressure piping applications. It integrates with an add-on sensor connection kit and a Sensor Control Monitor to deliver alerts to a Building Automation System (BAS) via RS-485 Modbus or the Nexa platform via Wi-Fi. Constructed with a lead-free bronze body, it includes NPT end connections, quarter-turn ball valves, and two poppet-style check valves. Item number F065379.

Help Me Connect

This Watts 1 inch Lead Free Reduced Pressure Zone Backflow Preventer includes a flood sensor with SentryPlus Alert technology. It is designed for enhanced monitoring by connecting to an add-on sensor connection kit to extend flood detection capabilities.

The entire system integrates with a Sensor Control Monitor (available separately) for advanced alert delivery and data management. The Sensor Control Monitor can collect data and transmit alerts to a Building Automation System (BAS) via RS-485 Modbus or directly to the Nexa platform via Wi-Fi connectivity, providing remote maintenance alerts and data streaming.

Installation of electrical connections for the Sensor Control Monitor and associated equipment should only be performed by a certified technician following all applicable local, state, federal, and governmental requirements, building and construction codes and standards.

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Additional Details

This 1 inch lead free reduced pressure zone backflow preventer assembly includes a flood sensor with SentryPlus Alert® technology to detect water discharges from the relief valve. It is designed to prevent the flow of polluted water from entering the potable water supply due to backsiphonage and/or backpressure, making it ideal for protection in continuous pressure piping applications and at health hazard cross-connections.

Features

  • SentryPlus Alert® flood sensor to detect continuous discharge from the relief valve
  • Add-on sensor connection kit capability to extend flood monitoring on compatible assemblies
  • Integrates with the Sensor Control Monitor to deliver maintenance alerts to a Building Automation System (BAS) via RS-485 Modbus or to the Nexa platform by Wi-Fi connectivity
  • Lead-free bronze body construction with NPT end connections
  • Includes a strainer
  • Quarter turn ball valve shutoffs with tee handles
  • Two poppet style check valves with replaceable check seats
  • Integrated air gap fitting
  • Compact, space-saving design with separate access covers for the check valves and relief valve
  • Top-mounted, screwdriver-slotted test cocks for easy testing and use in reduced clearance installations
  • EZ twist relief valve cover with quarter turn locking joint to capture the spring load during repair to facilitate disassembly
  • Bottom-mounted relief valve for reduced space requirements

Sensor Control Monitor Integration Details (Connection Kit Sold Separately)

  • Collects data from up to three pressure sensors and monitors relief valve discharges
  • Data displayed on the control screen are transmitted through RS-485 Modbus to a BAS, or by Wi-Fi to the Nexa® platform
  • Automatically generates alerts when maintenance or service is needed
  • Features a color touchscreen graphical user interface, configurable by Setup Wizard or manually through menus
  • Supports BAS Modbus (RS 485) alerts and data polling as well as Nexa Wi-Fi alerts and data streaming
  • Two relay output closures provide medium- and high-level alerts in custom configurations
  • 24 Vdc, 1 A power output available for equipment control
  • Unit can be mounted on a wall or DIN rail

WARNING: Only a certified technician should make the electrical connections to install the Sensor Control Monitor and connect equipment to the unit. Follow all local, state, federal and other governmental requirements, and all building and construction codes and standards.

Specifications

  • Nominal Size: 1 inch
  • Body Material: Lead-free bronze
  • End Connections: NPT
  • Valve Type: Reduced Pressure Zone (RPZ)
  • Shutoff Valves: Quarter turn ball valves with tee handles
  • Check Valves: Two poppet style
  • Relief Valve: Bottom-mounted
  • Test Cocks: Top-mounted, screwdriver-slotted
  • Sensor Technology: SentryPlus Alert flood sensor

FAQs

What is the primary function of the Watts 1 inch LF919-QT-S-FS backflow preventer?

This backflow preventer assembly is designed to prevent the flow of polluted water from entering the potable water supply due to backsiphonage and/or backpressure, ensuring water safety in continuous pressure piping applications.

What is SentryPlus Alert technology and what does it do?

SentryPlus Alert technology refers to the integrated flood sensor that detects continuous water discharge from the relief valve. When paired with a connection kit, it can relay alerts for potential flooding events.

How does this backflow preventer integrate with monitoring systems?

The assembly integrates with an add-on sensor connection kit and the Sensor Control Monitor (sold separately). This allows maintenance alerts to be delivered to a Building Automation System (BAS) via RS-485 Modbus or to the Nexa platform through Wi-Fi connectivity.

What materials are used in the construction of this backflow preventer?

The backflow preventer features a lead-free bronze body construction. It also includes poppet style check valves and a bronze strainer.

What type of end connections does this assembly have?

This backflow preventer assembly is equipped with NPT (National Pipe Taper) end connections for installation into a piping system.

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