2 800M4FR-FZ

Item Number: T388018
1 1
$1,347.00
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 2 inch
  • Body Material: Bronze
  • Maximum Working Pressure: 150 psi
  • Includes freeze sensor for SentryPlus Alert® technology
  • Built-in relief valve protects against ice formation
  • Female NPT inlet and outlet with lever handle shutoffs
  • Easy maintenance of internal parts
  • ASSE 1020 Approved

Description

The Watts 800M4FR is a 2 inch freeze-resistant pressure vacuum breaker designed to prevent backsiphonage of contaminated water into potable water supplies. Constructed with a durable bronze body, it features a unique built-in relief valve that protects internal components from freezing by mitigating pressure caused by ice formation. This backflow preventer includes a freeze sensor compatible with SentryPlus Alert® technology, signaling low temperatures and potential freeze events. It's equipped with 2 inch female NPT inlet and outlet connections with lever handle shutoffs, and test cocks for easy winterization. Ideal for irrigation and industrial process water systems, it operates up to 150 psi. Item number T388018.

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Connections and Installation

The Watts 800M4FR Pressure Vacuum Breaker features 2 inch Female NPT inlet and outlet connections. It must be installed in a continuous pressure potable water supply system, positioned 12 inches above the highest point of the downstream piping. Ensure the valve is installed vertically with the supply connected to the bottom. For optimal performance and safety, allow adequate space for inspection, servicing, or testing.

Freeze Sensor Functionality

  • The integrated freeze sensor monitors temperature and signals when conditions approach freezing.
  • To activate a full monitoring system with alerts for low and freezing temperatures, an add-on connection kit (sold separately) is required.
  • This kit enables freeze alerts through Wi-Fi networks, building management systems (BMS), or irrigation management systems (IMS).
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Additional Details

The Watts 800M4FR Freeze-Resistant Pressure Vacuum Breaker is a 2 inch backflow preventer designed to prevent backsiphonage of contaminated water into the potable water supply. It is ideal for continuous pressure health hazard applications, especially where sudden freezing conditions may occur, such as in irrigation systems and industrial process water systems.

This device features a bronze body and a unique built-in relief valve that protects internal components and the body from freezing by relieving pressure caused by ice formation. The integrated freeze sensor works with SentryPlus Alert® technology to notify personnel when temperatures approach freezing, requiring an add-on connection kit for full functionality.

A WARNING: It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Always consult local water authority, building, and plumbing codes before installation.

A WARNING: The freeze sensor only provides alerts about possible freeze events 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

  • Built-in relief valve automatically relieves pressure caused by ice formation to protect internal components.
  • Includes a freeze sensor for use with SentryPlus Alert® technology to signal low or freezing temperatures.
  • Compatible with add-on connection kits for Wi-Fi networks, BMS, and IMS to provide freeze alerts.
  • Durable bronze body construction ensures longevity.
  • Features female NPT inlet and outlet with convenient lever handle quarter turn shutoffs.
  • Test cocks are positioned for easy testing and winterization draining.
  • Designed for easy maintenance of internal parts with accessible components.
  • Compact, space-saving design for versatile installation.

Specifications

  • Size: 2 inch
  • Body Material: Bronze
  • Maximum Working Pressure: 150 psi (10.3 bar)
  • Minimum Working Pressure: 15 psi (55 kPa)
  • Temperature Range: 33°F to 140°F (1°C to 60°C)
  • Connection Type: Female NPT inlet and outlet
  • Shutoffs: Lever handle quarter turn ball valve
  • Check Valve Disc Material: Silicone rubber
  • Check Valve Seat Material: Noryl® plastic
  • Spring Material: Stainless steel
  • Bonnet Material: Celcon® with silicone rubber O-ring seal
  • Vent Disc Material: Silicone rubber
  • Disc Holder Float Material: Polypropylene

Certificates & Approvals

  • ANSI
  • IAPMO
  • USC Manual Section 10
  • ASSE 1020
  • USC-FCCCHR

FAQs

What is the primary function of the Watts 800M4FR?

The primary function of the Watts 800M4FR is to prevent backsiphonage, which is the reverse flow of polluted water into the potable water supply, especially in continuous pressure systems.

How does this pressure vacuum breaker protect against freezing?

The 800M4FR features a unique built-in relief valve that automatically relieves pressure caused by ice formation within the valve body, protecting internal components and the body itself from damage.

Does the freeze sensor prevent freezing?

No, the freeze sensor does not prevent freezing. It solely provides alerts about possible freeze events to facility personnel, allowing them to take action to prevent freeze conditions from causing product or property damage.

What type of connections does the 2 inch 800M4FR have?

This 2 inch model features Female NPT inlet and outlet connections. It also includes quarter-turn shutoffs with lever handles for easy operation.

What is the maximum operating pressure and temperature range?

The maximum operating pressure for the 800M4FR is 150 psi (10.3 bar). It is designed to operate within a temperature range of 33°F to 140°F (1°C to 60°C).