3/4 800M4FR-FZ

Item Number: T388014
1 1
$520.50
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Connection Size: 3/4 inch Female NPT
  • Body Material: Durable Bronze
  • Freeze Protection: Built-in relief valve
  • Monitoring: Integrated freeze sensor for SentryPlus Alert®
  • Maximum Working Pressure: 150 psi
  • Temperature Range: 33°F to 140°F
  • Shutoffs: Quarter-turn tee handle ball valves
  • Approval: ASSE 1020

Description

This 3/4 inch Watts 800M4FR-FZ is a freeze-resistant pressure vacuum breaker designed to prevent backsiphonage of contaminated water into potable water supplies. It features a durable bronze body and a unique built-in relief valve to protect against freezing conditions, ideal for irrigation or industrial process water systems. An integrated freeze sensor utilizes SentryPlus Alert® technology to warn of potential freeze events, though an add-on connection kit is required for activation. It has 3/4 inch Female NPT inlet/outlet connections with quarter-turn tee handle shutoffs, supporting a maximum working pressure of 150 psi and temperatures from 33°F to 140°F.

Help Me Connect

Connections

  • The 3/4 inch Female NPT inlet and outlet connections allow for secure integration into your plumbing system.
  • Equipped with quarter-turn tee handle shutoffs for easy control of water flow.

Installation Guidelines

  • Install this pressure vacuum breaker in a continuous pressure potable water supply system 12 inches above the highest point of the downstream piping.
  • The valve must be installed with the supply connected to the bottom and in a vertical position.
  • Ensure adequate space is available for periodic inspection, servicing, or testing.
  • Test cocks are conveniently positioned at the lowest point of the valve for winterization draining.

Sensor Activation

  • An add-on connection kit (sold separately) is required to activate the integrated freeze sensor for communication with monitoring systems (Wi-Fi, BMS, IMS).

Important Compatibility Note

This product is a pressure vacuum breaker and is not designed, tested, or approved to protect against backpressure backflow or water hammer shock. For these applications, consider a Watts 909/009 Reduced Pressure Zone backflow preventer for backpressure or a Watts Series 15 Water Hammer Arrestor for water hammer shock.

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Additional Details

This 3/4 inch freeze-resistant pressure vacuum breaker backflow preventer (PVB) prevents the reverse flow of polluted water into the potable water supply due to backsiphonage, making it ideal for continuous pressure health hazard applications.

Its superior design includes a built-in relief valve to protect internal components and the durable bronze body from freezing conditions, ensuring reliable performance in environments like irrigation systems and industrial process water systems.

Key Features

  • Features a freeze sensor for use with SentryPlus Alert® technology to signal facility personnel when temperatures near and reach the freezing point.
  • A unique built-in relief valve relieves pressure caused by ice formation within the assembly.
  • Constructed with a durable bronze body for long-lasting use.
  • Equipped with female NPT inlet and outlet connections and quarter-turn tee handle shutoffs.
  • Includes test cocks positioned for easy testing and winterization draining.
  • Designed for easy maintenance of internal parts, featuring a replaceable plastic seat and silicone seat disc.
  • An O-ring bonnet seal reduces the possibility of fouling.
  • Offers a compact, space-saving design that requires no special tools for servicing.

Important Warnings

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. Before installing standard material product, consult your local water authority, building and plumbing codes.

A WARNING: The 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.

NOTICE: An add-on connection kit (sold separately) is required to activate the freeze sensor. Without this kit, the sensor is a passive component that has no communication with any other device.

Specifications

  • Model: 800M4FR-FZ
  • Connection Size: 3/4 inch
  • Connection Type: Female NPT inlet and outlet
  • Body Material: Bronze
  • Check Valve Disc Material: Silicone rubber
  • Check Valve Seat Material: Noryl® plastic
  • Vent Disc Material: Silicone rubber
  • Disc Holder Float Material: Polypropylene
  • Bonnet Material: Celcon®
  • Springs Material: Stainless steel
  • Shutoff Type: Tee handle quarter turn ball valve
  • Minimum Working Pressure: 15 psi (55 kPa)
  • Maximum Working Pressure: 150 psi (10.3 bar)
  • Temperature Range: 33°F to 140°F (1°C to 60°C)
  • Includes: Freeze sensor

Dimensions & Weight (Approximate)

  • Overall Height (A): 6 1/2 in (165 mm)
  • Width (B): 6 1/2 in (165 mm)
  • Depth (E): 4 1/8 in (105 mm)
  • Weight: 4 lb (1.8 kg)

Certificates & Approvals

  • ANSI
  • IAPMO
  • USC Manual Section 10
  • ASSE 1020
  • USC-FCCCHR
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at USC

FAQs

What is the primary function of the Watts 800M4FR-FZ?

The Watts 800M4FR-FZ is a freeze-resistant pressure vacuum breaker designed to prevent backsiphonage of contaminated water into potable water supplies. It is ideal for continuous pressure health hazard applications such as irrigation systems.

How does the 800M4FR-FZ protect against freezing conditions?

This model features a unique built-in relief valve that automatically relieves pressure caused by ice formation within the valve body. This protects the internal components and the durable bronze body from damage during sudden freeze conditions.

Does the included freeze sensor actively prevent freezing?

No, the freeze sensor's primary role is to provide alerts to facility personnel when temperatures approach the freezing point. It signals potential freeze events, but user action is required to prevent actual freezing and potential product or property damage.

What type of connections does this pressure vacuum breaker have?

The 800M4FR-FZ is equipped with 3/4 inch Female NPT (National Pipe Taper) inlet and outlet connections. It also includes convenient quarter-turn tee handle shutoffs.

Is an additional connection kit necessary to utilize the freeze sensor's alert capabilities?

Yes, an add-on connection kit, which is sold separately, is required to activate the freeze sensor's communication features. This kit enables alerts via Wi-Fi networks, building management systems (BMS), or irrigation management systems (IMS).