10 LF909M1-DOSY-FS

Item Number: 88009353
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$72,107.54
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • 10 inch reduced pressure zone assembly
  • Weight: 2230.0 lb
  • Lead Free* construction
  • ArmorTek® coating for corrosion resistance
  • Domestic Outside Stem and Yoke (OSY) shutoff valves
  • SentryPlus Alert® flood sensor included
  • Maximum Working Pressure: 175 PSI
  • Replaceable seats for easy maintenance
  • Stainless steel internal parts

Description

The Watts LF909 Series 10 inch Lead Free reduced pressure zone backflow preventer assembly protects potable water supplies from pollution due to backsiphonage and backpressure. It features durable cast iron construction with a patented ArmorTek® three-part epoxy coating to resist corrosion. Equipped with domestic OSY shutoff valves and replaceable stainless steel seats, this assembly ensures long-term reliability. A built-in SentryPlus Alert® flood sensor detects excessive water discharge, offering enhanced monitoring capabilities when paired with an add-on connection kit. Ideal for health hazard cross-connections, it operates at a maximum working pressure of 175 PSI.

Help Me Connect

This Watts LF909 Reduced Pressure Zone Assembly is designed for installation at health hazard cross-connections within plumbing systems or for containment at the service line entrance to protect the potable water supply.

Flood Sensor Connectivity

  • The integrated flood sensor with SentryPlus Alert® technology requires an add-on connection kit (sold separately) for activated alerts and communication.
  • Connection kit options include compatibility with BMS (Building Management Systems), cellular communication, or the Sensor Control Monitor which enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.
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Additional Details

This 10 inch Lead Free reduced pressure zone backflow preventer assembly is designed to prevent the reverse flow of polluted water from entering the potable water supply due to backsiphonage or backpressure. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards.

Construction & Materials

  • Features an epoxy coated cast iron body for durability.
  • Includes domestic outside stem and yoke resilient seated gate valves.
  • Equipped with captured spring check valves, replaceable seats, and top mounted test cocks.
  • The pressure differential relief valve is field reversible for versatile installation.
  • The assembly's coating utilizes ArmorTek®, a patented three-part advanced epoxy system engineered to limit both microbial induced (MIC) and exposed metal substrate corrosion.

Flood Sensor Technology

  • Contains a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve.
  • When paired with an add-on connection kit (sold separately), the sensor is activated to relay alerts for potential flooding events.
  • Connection kit options include BMS, cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

Specifications

  • Size: 10 inch
  • Body Material: Cast Iron
  • Coating: ArmorTek® Powder Coating (applied to internal and external surfaces)
  • Seat Material: Stainless Steel
  • Trim Material: Stainless Steel
  • Relief Valve Body Material: Cast Iron (for 4 inch to 10 inch)
  • Test Cock Material: Lead Free* Copper Silicon Alloy
  • Shutoff Valves: Domestic Outside Stem and Yoke (OSY)
  • Pressure Differential Relief Valve: Field Reversible
  • Maximum Working Pressure: 175 PSI (12.06 bar)
  • Temperature Range (Continuous): 33°F to 110°F (0.5°C to 43°C)
  • Temperature Range (Intermittent): 140°F (60°C)
  • Lead Free*: Yes (wetted surface contains less than 0.25% lead by weight)

Certificates & Approvals

  • ASSE 1013
  • AWWA C511-92
  • CSA B64.5
  • UL Classified File No. EX3185
  • FM Approved
  • IAPMO (UPC)
  • NSF Certified to NSF/ANSI 61-G
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California

FAQs

What is the primary function of this 10 inch backflow preventer assembly?

This Watts LF909 series assembly is designed to prevent the reverse flow of polluted water into the potable water supply. It protects against both backsiphonage and backpressure conditions, making it suitable for health hazard cross-connections.

What does 'Lead Free' mean for this product?

The 'Lead Free' designation indicates that the wetted surface of this backflow preventer, which comes into contact with consumable water, contains less than 0.25% of lead by weight, complying with Lead Free installation requirements.

How does the SentryPlus Alert® flood sensor function?

The integrated flood sensor detects excessive water discharges from the relief valve. When used with an optional add-on connection kit, it activates to relay alerts to facility personnel via BMS, cellular communication, or the Nexa® platform, helping prevent potential flooding.

What is ArmorTek® coating and why is it important?

ArmorTek® is a patented three-part advanced epoxy coating system applied to the internal and external surfaces of the cast iron body. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the longevity and durability of the backflow preventer.

What type of shutoff valves are included with this assembly?

This Watts LF909 series assembly includes domestic outside stem and yoke (OSY) resilient seated gate valves. These valves provide reliable shutoff capability and are a common feature in industrial and fire safety applications.

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