3/4 LF919-QT-FS

Item Number: F065372
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$1,283.91
Limited Stock (7)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • Size: 3/4 inch
  • Body Material: Lead-free bronze
  • Connections: NPT
  • Includes flood sensor with SentryPlus Alert technology
  • Features two poppet style check valves
  • Quarter turn ball valve shutoffs with tee handles
  • Maximum Operating Pressure: 175 PSI
  • Maximum Operating Temperature: 180 F

Description

This 3/4 inch Lead Free Reduced Pressure Zone Backflow Preventer Assembly, model LF919-QT-FS, prevents polluted water from entering potable water supplies due to backsiphonage or backpressure. Constructed from lead-free bronze with NPT end connections, it is ideal for continuous pressure piping applications and health hazard cross-connections. Key features include quarter turn ball valve shutoffs, two poppet style check valves with replaceable seats, and top-mounted test cocks for easy maintenance. An integrated flood sensor with SentryPlus Alert technology detects relief valve discharge, with optional connectivity to BAS via RS-485 Modbus or Nexa via Wi-Fi for remote alerts. It offers a compact design for space-saving installations.

Help Me Connect

This 3/4 inch Lead Free Reduced Pressure Zone Backflow Preventer Assembly features NPT end connections for straightforward installation into your piping system. The assembly's integrated flood sensor with SentryPlus Alert technology is designed to connect with an optional add-on sensor connection kit. This kit can then integrate with a Building Automation System (BAS) via RS-485 Modbus or the Nexa platform through Wi-Fi, enabling remote monitoring and alerts for continuous relief valve discharge.

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Additional Details

This 3/4 inch Lead Free Reduced Pressure Zone Backflow Preventer Assembly, model LF919-QT-FS, is designed to prevent the flow of polluted water from entering 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, including those at the service line entrance.

The assembly includes a built-in flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve, providing an early warning for potential flooding events.

Features

  • Lead-free bronze body construction ensures safe water contact.
  • Equipped with quarter turn ball valve shutoffs with tee handles for easy operation.
  • Features two poppet style check valves and replaceable check seats for reliable performance and easy maintenance.
  • Compact, space-saving design with separate access covers for check valves and relief valve.
  • Top-mounted, screwdriver-slotted test cocks facilitate easy testing, even in reduced clearance installations.
  • EZ twist relief valve cover with quarter turn locking joint captures the spring load during repair to simplify disassembly.
  • Bottom-mounted relief valve further contributes to reduced space requirements.

SentryPlus Alert Technology

  • Includes a flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve.
  • When paired with an add-on sensor connection kit, the sensor is activated to relay alerts for potential flooding events.
  • Connection kit options (BMS, cellular communication, and the Sensor Control Monitor) enable integration with Building Automation Systems (BAS) via RS-485 Modbus or the Nexa platform through Wi-Fi, delivering critical maintenance alerts.

Installation of backflow prevention assemblies and connection to monitoring equipment should only be performed by a certified technician following all local, state, federal, and governmental requirements, and all building and construction codes and standards.

Specifications

  • Product Type: Reduced Pressure Zone Backflow Preventer Assembly
  • Nominal Size: 3/4 inch
  • Model: LF919-QT-FS
  • Body Material: Lead-free bronze
  • End Connections: NPT
  • Shutoffs: Quarter turn ball valves with tee handles
  • Check Valves: Two poppet style
  • Check Seats: Replaceable
  • Flood Sensor: Integrated with SentryPlus Alert technology
  • Test Cocks: Top-mounted, screwdriver-slotted
  • Relief Valve Cover: EZ twist with quarter turn locking joint
  • Relief Valve Mounting: Bottom-mounted

Performance

  • Maximum Operating Pressure: 175 PSI
  • Maximum Operating Temperature: 180 F

Certificates & Approvals

  • ASSE 1013

FAQs

What is the primary purpose of this backflow preventer assembly?

Its primary purpose is to prevent the flow of polluted water from entering the potable water supply due to backsiphonage, backpressure, or both, ensuring the safety of your drinking water.

What kind of connections does this assembly have?

This 3/4 inch backflow preventer assembly features NPT (National Pipe Taper) end connections, which are standard for many plumbing systems.

How does the flood sensor feature work?

The integrated flood sensor with SentryPlus Alert technology detects continuous discharge from the relief valve. When paired with an optional add-on connection kit, it can transmit alerts to a Building Automation System (BAS) via RS-485 Modbus or to the Nexa platform via Wi-Fi.

What materials is this backflow preventer made from?

The body of this assembly is constructed from lead-free bronze, ensuring durability and safe contact with potable water.

Can this backflow preventer be serviced easily?

Yes, it features replaceable check seats, separate access covers for the check valves and relief valve, and an EZ twist relief valve cover to facilitate disassembly and maintenance.

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