1 800M4-QT-FZ

Item Number: T388002
1 1
$489.00
Limited Stock (3)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • Size: 1 inch
  • Body Material: Bronze
  • Maximum Operating Pressure: 150 PSI
  • Minimum Operating Pressure: 15 PSI
  • Temperature Range: 33°F to 140°F
  • Features SentryPlus Alert® freeze sensor
  • Connections: 1 inch Female NPT
  • Equipped with tee handle shutoffs

Description

The Watts 1 inch 800M4QT-FZ Antisiphon Pressure Vacuum Breaker is designed to prevent backsiphonage of contaminated water into potable supplies. Featuring a durable bronze body and an acetal bonnet, it includes a SentryPlus Alert® compatible freeze sensor to warn of freezing conditions, though user action is required for prevention. With a 1 inch female NPT inlet/outlet and tee handle shutoffs, it's suitable for continuous pressure irrigation and industrial process water systems. It operates between 15-150 PSI and 33-140°F, ensuring reliable performance and easy maintenance with accessible internal parts and test cocks for winterization.

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Installation & Compatibility

  • This valve is designed for installation in a continuous pressure potable water supply system 12 inches above the highest point of the downstream piping, in a vertical position with supply connected to the bottom.
  • Ideal for health hazard continuous pressure applications like **irrigation systems** and **industrial process water systems** where water enters equipment at or below its flood rim.
  • Vacuum breakers are not designed, tested, or approved to protect against **backpressure backflow** or **water hammer shock**. For protection against backpressure backflow, install a Watts 909/009 Reduced Pressure Zone backflow preventer. For water hammer shock, install a Watts Series 15 Water Hammer Arrestor.
  • The integrated freeze sensor requires an **add-on connection kit (sold separately)** to enable communication with Wi-Fi networks, Building Management Systems (BMS), or Irrigation Management Systems (IMS).
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Additional Details

The Watts 1 inch 800M4QT-FZ **Antisiphon Pressure Vacuum Breaker** with **freeze sensor** prevents backsiphonage of contaminated water into a potable water supply, making it ideal for irrigation and industrial process water systems.

Key Features

  • **Freeze Sensor**: Includes a freeze sensor for use with **SentryPlus Alert® technology** to signal facility personnel when temperatures approach freezing. An add-on connection kit (sold separately) is required to activate the sensor for Wi-Fi, BMS, or IMS integration.
  • **Durable Construction**: Features a **bronze body** for longevity and an **acetal bonnet** that acts as a "freeze plug" to help prevent body damage.
  • **Easy Maintenance**: Designed for easy maintenance of internal parts with a **replaceable plastic seat** and **silicone seat disc** for durability. Test cocks are positioned for simple testing and winterization.
  • **Connections**: Equipped with **1 inch female NPT inlet and outlet** and **tee handle quarter turn ball valve shutoffs** for convenient operation.

WARNING: The freeze sensor provides alerts only and does not prevent freezing. User action is required to prevent freeze conditions from causing product and/or property damage.

Specifications

General

  • Product Type: Antisiphon Pressure Vacuum Breaker
  • Size: 1 inch
  • Model: 800M4QT-FZ
  • Connections: 1 inch Female NPT (Union)
  • Shutoffs: Tee handle quarter turn ball valves
  • Freeze Sensor: Included, SentryPlus Alert® compatible

Materials

  • Body Material: Bronze
  • Bonnet Material: Celcon® (Acetal)
  • 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

Performance

  • Maximum Operating Pressure: 150 PSI (10.3 bar)
  • Minimum Operating Pressure: 15 PSI
  • Temperature Range: 33°F to 140°F (0.5°C to 60°C)

Certificates & Approvals

  • ANSI
  • USC
  • ASSE 1020
  • UPC
  • CSA
  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

Dimensions & Weight (1 inch Model)

  • Height (A): 7 1/2 inches (191 mm)
  • Width (B): 7 1/2 inches (191 mm)
  • Depth (C): 2 3/4 inches (70 mm)
  • Weight: 6 lbs (2.7 kg)

FAQs

What is the primary purpose of the Watts 800M4QT-FZ Pressure Vacuum Breaker?

Its primary purpose is to prevent backsiphonage of contaminated water from entering a potable water supply, protecting the drinking water system from pollution.

How does the integrated freeze sensor work, and what is its limitation?

The freeze sensor, compatible with SentryPlus Alert® technology, signals facility personnel when temperatures approach freezing. However, it only provides alerts and does not actively prevent freezing; user action is required to prevent damage.

What are the suitable applications for this 1 inch pressure vacuum breaker?

This valve is ideally suited for health hazard continuous pressure applications, such as irrigation systems and industrial process water systems, where water enters the equipment at or below its flood rim.

What are the pressure and temperature limits for this device?

The device has a maximum operating pressure of 150 PSI (10.3 bar), a minimum operating pressure of 15 PSI, and operates within a temperature range of 33°F to 140°F (0.5°C to 60°C).

Can this backflow preventer protect against backpressure or water hammer?

No, vacuum breakers are not designed to protect against backpressure backflow or water hammer shock. For these protections, specific devices like a Watts 909/009 Reduced Pressure Zone backflow preventer or a Watts Series 15 Water Hammer Arrestor should be installed.