1/2 LF800M4-QT-FZ

Item Number: T792010
1 1
$623.25
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 1/2 inch
  • Body Material: Lead Free* cast copper silicon alloy
  • Maximum Working Pressure: 150 psi (10.3 bar)
  • Temperature Range: 33°F to 140°F (0.5°C to 60°C)
  • Includes integrated freeze sensor for SentryPlus Alert® technology
  • Female NPT inlet and outlet connections with quarter turn shutoffs
  • Approved to ANSI/ASSE Standard 1020
  • Easy maintenance with replaceable plastic seat

Description

This 1/2 inch Watts LF800M4QT-FZ lead free anti-siphon pressure vacuum breaker backflow preventer is designed for continuous pressure applications, protecting potable water supplies from backsiphonage of contaminated water. It is ideal for irrigation and industrial process water systems. Constructed from lead free cast copper silicon alloy, it features an integrated freeze sensor that works with SentryPlus Alert® technology to provide temperature alerts when activated by a separate connection kit. Key features include a replaceable plastic seat, durable silicone check valve disc, and easy maintenance. With a maximum working pressure of 150 psi and a temperature range of 33°F to 140°F, this unit ensures reliable performance and safety. Item number T792010.

Help Me Connect

Connections

  • The 1/2 inch Female NPT inlet connects to a 1/2 inch Male NPT pipe or fitting supplying water to the system.
  • The 1/2 inch Female NPT outlet connects to a 1/2 inch Male NPT pipe or fitting for downstream distribution.
  • This assembly is equipped with quarter turn shutoffs at both the inlet and outlet for easy isolation during maintenance or winterization.

Freeze Sensor Activation

The integrated freeze sensor is a passive component. To activate its monitoring capabilities and receive freeze alerts, an add-on connection kit is required and sold separately. This kit enables communication with Wi-Fi networks, Building Management Systems (BMS), or Irrigation Management Systems (IMS).

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Additional Details

This 1/2 inch Watts LF800M4QT-FZ lead free anti-siphon pressure vacuum breaker backflow preventer is designed to prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage. It is ideally suited for health hazard continuous pressure applications such as irrigation systems and industrial process water systems where the water enters the equipment at or below its flood rim.

The integrated freeze sensor solely provides alerts about a possible freeze event and cannot prevent a freeze event from occurring. User action is required to prevent freeze conditions from causing product and/or property damage.

Key Features

  • Lead Free* cast copper silicon alloy body construction for compliance with safe drinking water requirements.
  • Includes an integrated freeze sensor for use with SentryPlus Alert® technology to signal facility personnel when temperatures near and reach freezing.
  • Features a replaceable plastic seat for simplified maintenance of internal parts.
  • Acetal bonnet acts as a "freeze plug" to prevent body damage from ice expansion.
  • O-ring bonnet seal reduces the possibility of fouling and enhances reliability.
  • Silicone check valve disc provides superior durability.
  • Equipped with tee handle quarter turn ball valve shutoffs and test cocks for easy testing and winterization draining.
  • Compact design requires no special tools for servicing.

Specifications

  • Body Material: Lead Free* cast copper silicon alloy
  • Size: 1/2 inch
  • Bonnet Material: Celcon®
  • Vent Disc Material: Silicone rubber
  • Disc Holder Float Material: Polypropylene
  • Check Valve Disc Material: Silicone rubber
  • Check Valve Seat Material: Noryl® plastic
  • Springs Material: Stainless steel
  • Maximum Working Pressure: 150 psi (10.3 bar)
  • Minimum Working Pressure: 15 psi
  • Temperature Range: 33°F to 140°F (0.5°C to 60°C)
  • Inlet/Outlet Connections: Female NPT
  • Model: LF800M4QT-FZ

Certificates & Approvals

  • ANSI/ASSE Standard 1020
  • UPC
  • NSF (Certified to NSF/ANSI 372)
  • CSA 1/2" to 2"

FAQs

What is the primary purpose of the Watts LF800M4QT-FZ backflow preventer?

Its primary purpose is to prevent backsiphonage of contaminated water into a potable water supply. It is ideal for irrigation and industrial process water systems where water enters equipment at or below its flood rim.

Is this backflow preventer lead-free?

Yes, it features Lead Free* cast copper silicon alloy construction, meaning the wetted surface contains less than 0.25% lead by weight, complying with safe drinking water requirements.

How does the integrated freeze sensor work?

The integrated freeze sensor works with SentryPlus Alert® technology to signal facility personnel when temperatures approach freezing. To activate its monitoring and alert functions, an add-on connection kit, sold separately, is required.

What are the pressure and temperature limits for this device?

This backflow preventer has a maximum working pressure of 150 psi (10.3 bar) and can operate within a temperature range of 33°F to 140°F (0.5°C to 60°C).

Can this device protect against backpressure backflow or water hammer?

No, vacuum breakers like the LF800M4QT-FZ are not designed, tested, or approved to protect against backpressure backflow or water hammer shock. For such protection, different devices like a Reduced Pressure Zone Backflow Preventer or Water Hammer Arrestor would be needed.