1 LF909-QT-FS

Item Number: F391009
1 2
$3,083.81
Limited Stock (7)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • 1 inch Lead Free Reduced Pressure Zone Backflow Preventer
  • Body Material: Lead Free* cast copper silicon alloy
  • Connection Type: 1 inch Female NPT threaded
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F continuous
  • Flood Sensor: SentryPlus Alert® technology
  • Shutoff Valves: Quarter-turn ball with tee handles
  • Approved: ASSE 1013, AWWA C-511-92, CSA B64.4, NSF

Description

The Watts 1 inch Lead Free Reduced Pressure Zone Backflow Preventer (LF909-QT-FS) provides superior protection for potable water supplies against hazardous cross-connections. Featuring Lead Free* cast copper silicon alloy construction and a patented air-in/water-out relief valve, this assembly offers reliable backsiphonage and backpressure prevention. It includes a SentryPlus Alert® flood sensor for discharge detection, with optional connectivity for remote alerts. Designed for easy installation, it supports horizontal or vertical mounting and has a maximum working pressure of 175 psi. Item number F391009.

Help Me Connect

Connections

  • The 1 inch female NPT threaded body connection is designed to accept a 1 inch male NPT threaded pipe or fitting.

Flood Sensor Connectivity

The integrated flood sensor requires an add-on connection kit (sold separately) for activated communication features. These kits enable compatibility with Building Management Systems (BMS) or cellular communication. For advanced integration, a Sensor Control Monitor (also sold separately) can connect to your BAS via RS-485 Modbus or to the Nexa® platform through Wi-Fi.

View full details

Additional Details

This 1 inch lead free reduced pressure zone backflow preventer assembly protects the potable water supply from contamination due to backsiphonage and backpressure. It is ideal for continuous pressure piping applications and cross-connections identified as health hazards.

Features

  • Lead Free* construction throughout, including the cast copper silicon alloy body and ball valve shutoffs, to comply with national plumbing codes and reduce lead content.
  • Unique patented air-in and water-out principle provides high capacity relief valve discharge during emergency conditions of combined backsiphonage and backpressure with both checks fouled.
  • Includes a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve, helping prevent costly damage.
  • Flood alerts can be activated with an add-on sensor connection kit (sold separately), compatible with BMS and cellular communication, or integrated with BAS via RS-485 Modbus or Nexa® platform through Wi-Fi.
  • Modular, compact design easing installation and servicing.
  • Features quarter-turn ball valve shutoffs with tee handles.
  • Replaceable seats for simplified maintenance.
  • Can be installed horizontal or vertical (up or down).
  • Equipped with top mounted test cocks.
Note: An add-on connection kit is required to activate the flood sensor's communication features. Without the kit, the flood sensor is a passive component. Watts is not responsible for alert failures due to connectivity or power issues.

Specifications

General

  • Product Type: Reduced Pressure Zone Backflow Preventer
  • Size: 1 inch
  • Flood Sensor: Yes, with SentryPlus Alert® technology
  • Installation Orientation: Horizontal or vertical (up or down)

Materials

  • Body Material: Lead Free* cast copper silicon alloy
  • Shutoff Valve Material: Lead Free* cast copper silicon alloy
  • Check Seats: 909 Celcon®
  • Relief Valve Seats: Stainless Steel 909
  • Test Cocks: Lead Free* cast copper silicon alloy

Performance Ratings

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range (Continuous): 33°F - 140°F (0.5°C ~ 60°C)
  • Temperature Range (Intermittent): 180°F (82°C)

Connections

  • Connection Type: 1 inch Female NPT threaded body connection

Certificates & Approvals

  • ASSE 1013
  • AWWA C-511-92
  • CSA B64.4
  • FCCCHR of USC Manual Section 10
  • IAPMO (UPC)
  • SBCCI (Standard Plumbing code)
  • NSF International (Certified to NSF/ANSI 61-G&372)
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at University of Southern California

FAQs

What does "Lead Free" mean for this backflow preventer?

"Lead Free" means that the wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight, complying with national lead-free installation requirements.

What type of connections does this 1-inch model use?

This 1-inch model features 1 inch Female NPT (National Pipe Taper) threaded body connections, designed to connect to male NPT threaded pipes or fittings.

What is the purpose of the flood sensor on this assembly?

The integrated flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. When activated with an add-on connection kit, it can relay signals to facility personnel to prevent potential flooding and costly damage.

What is the maximum operating temperature for this backflow preventer?

This backflow preventer has a continuous operating temperature range of 33°F to 140°F (0.5°C to 60°C). It can also handle intermittent temperatures up to 180°F (82°C).

Can this backflow preventer be installed in any orientation?

Yes, this assembly features a modular, compact design that allows for installation in either a horizontal or vertical (up or down) orientation on limited sizes.

Related Products

1 2