Watts 1 1/2" LF800M4FR

Item Number: 0792020
1 1
$1,715.25
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 1 1/2 inch
  • Weight: 13.4 lb
  • Connection Type: Female NPT Inlet and Outlet
  • Body Material: Lead Free* Cast Copper Silicon Alloy
  • Freeze-resistant design with built-in relief valve
  • Integrated freeze sensor with Wi-Fi alert capability
  • Maximum Working Pressure: 150 PSI
  • Easy internal maintenance, no special tools required
  • Certified to ASSE 1020 / CSA B64.12

Description

The Watts 1 1/2" LF800M4FR is a Lead Free freeze-resistant pressure vacuum breaker designed to prevent backsiphonage of contaminated water into a potable supply. Constructed from durable cast copper silicon alloy, this backflow preventer is ideal for continuous pressure applications like irrigation systems. It features a unique built-in relief valve for freeze protection and includes an integrated freeze sensor with Wi-Fi alerts for temperature monitoring. The valve offers easy maintenance with replaceable parts and quarter-turn lever handle shutoffs. It operates up to 150 PSI and is certified to ASSE 1020 / CSA B64.12 and NSF/ANSI 372 standards. Item number 0792020.

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Installation & Compatibility

  • This pressure vacuum breaker is designed for installation in a continuous pressure potable water supply system.
  • It must be installed in a vertical position with the supply connected to the bottom.
  • Maintain the valve at least 12 inches above the highest point of the downstream piping.
  • Ensure adequate space is available for periodic inspection, servicing, or testing.
  • Do not install in areas prone to freezing or spillage.
  • This device is designed to prevent backsiphonage; it is not designed, tested, or approved to protect against backpressure backflow or water hammer shock. For protection against backpressure backflow, consider a Watts LF009 Reduced Pressure Zone backflow preventer. For water hammer shock, install a Watts Series LF15 Water Hammer Arrestor.

Warranty Information

Limited Warranty:
Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge. THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.
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Additional Details

This 1 1/2 inch Watts Series LF800M4FR is a Lead Free freeze-resistant pressure vacuum breaker backflow preventer designed to prevent the reverse flow of polluted water from entering into a potable water supply due to backsiphonage. It is commonly used in continuous pressure applications such as irrigation systems and industrial process water systems, particularly where water enters equipment at or below its flood rim.

Freeze Resistance & Protection

  • Features a unique built-in relief valve that relieves pressure caused by ice formation, protecting internal components and the backflow body during sudden freeze conditions.
  • An acetal bonnet acts as a "freeze plug" to prevent body damage.
  • Includes a freeze sensor for use with SentryPlus Alert® technology to monitor temperature and alert facility personnel when freeze conditions could cause damage.
  • The sensor offers built-in Wi-Fi function to communicate freeze alerts directly to the user, eliminating the need for a third-party controller.
  • The standalone sensor provides flexibility for locating a measuring tool near water-carrying outdoor installations vulnerable to freezing.
  • 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. The use of the freeze sensor does not replace the need to comply with all required instructions, codes, and regulations related to installation, operation, and maintenance of this product, including the need to provide protection against a freeze event.

Design & Connections

  • Constructed with a Lead Free* cast copper silicon alloy body for durability.
  • Features a replaceable plastic seat and a silicone seat disc for durability.
  • Easy maintenance of internal parts with no special tools required for servicing.
  • An O-ring bonnet seal reduces the possibility of fouling.
  • Test cocks are positioned for easy testing and winterization.
  • Compact space saving design.
  • Equipped with lever handle quarter turn ball valve shutoffs on both inlet and outlet.
  • The device is reusable with the relief valve designed to automatically reseat.
  • Designed for bottom NPT inlet and side NPT outlet connections.

Specifications

  • Product Type: Freeze-Resistant Pressure Vacuum Breaker
  • Model: LF800M4FR
  • Size: 1 1/2 inch
  • Connection Type: Female NPT Inlet and Outlet

Materials

  • Body Material: Lead Free* Cast Copper Silicon Alloy
  • Springs: Stainless Steel
  • Bonnet: Celcon®
  • Vent Disc: Silicone Rubber
  • Disc Holder Float: Polypropylene
  • Check Valve Disc: Silicone Rubber
  • Check Valve Seat: Noryl® Plastic

Performance

  • Temperature Range: 33°F to 140°F (0.5°C to 60°C)
  • Maximum Working Pressure: 150 PSI (10.3 bar)
  • Minimum Operating Pressure: 15 PSI (55 kPa)

Certificates & Approvals

  • Standard: ASSE 1020 / CSA B64.12
  • Standard: NSF/ANSI 372
  • Standard: IAPMO
  • Approved By: Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California, Manual Section 10

FAQs

What is the primary function of the Watts LF800M4FR?

The primary function of the Watts LF800M4FR is to prevent the backsiphonage of contaminated water from entering the potable water supply, typically in continuous pressure applications like irrigation systems.

How does the LF800M4FR offer freeze protection?

This device incorporates a unique built-in relief valve that automatically relieves pressure caused by ice formation, protecting internal components. It also includes an acetal bonnet that acts as a "freeze plug" to prevent body damage.

What is the purpose of the freeze sensor included with this unit?

The freeze sensor monitors temperature and alerts facility personnel via built-in Wi-Fi when freeze conditions might cause damage. However, it's important to note that the sensor provides alerts only and does not prevent freezing; user action is still required.

What are the recommended installation requirements for this pressure vacuum breaker?

The valve must be installed in a vertical position with the supply connected to the bottom, at least 12 inches above the highest point of the downstream piping. It is crucial to allow adequate space for servicing and to avoid installation in areas prone to freezing.

What is the maximum operating pressure for the Watts LF800M4FR?

The Watts LF800M4FR has a maximum operating pressure of 150 PSI (10.3 bar). It also has a minimum operating pressure of 15 PSI (55 kPa).