10 LF909M1-OSY-FS

Item Number: 88009317
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$67,386.00
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 10 inch
  • Body Material: Cast Iron
  • Coating: ArmorTek 3-part advanced epoxy
  • Flood Sensor: SentryPlus Alert technology
  • Max Working Pressure: 175 psi
  • Shutoff Valves: Outside Stem and Yoke (OSY)
  • Lead Free Construction: Yes
  • Approvals: ASSE 1013, AWWA C511-92, CSA B64.5, UL, IAPMO, NSF 61-G

Description

This 10 inch Watts LF909 Series Reduced Pressure Zone Backflow Preventer Assembly is designed for cross-connection control, safeguarding potable water supplies from pollution due to backsiphonage and backpressure. It features a robust cast iron body with ArmorTek 3-part advanced epoxy coating for superior corrosion resistance. Equipped with a SentryPlus Alert flood sensor, it detects excessive relief valve discharge and can provide alerts when paired with an add-on connection kit. The assembly includes OSY gate valves, replaceable stainless steel seats, and an air-in/water-out relief valve design for high discharge capacity. It is approved by ASSE, AWWA, CSA, UL, IAPMO, and NSF 61-G. Item number 88009317.

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Installation Notes

  • The installation of a drain line is recommended for this backflow preventer. An air gap is necessary when installing a drain line.
  • An add-on connection kit is required to activate the flood sensor's alert features. Without this kit, the sensor operates passively with no external communication.
  • Optional connection kits can provide communication with BMS (Building Management Systems), cellular networks, or integrate with BAS (Building Automation Systems) via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity.
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Additional Details

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

Features

  • Equipped with a flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve.
  • Add-on sensor connection kit required for flood alerts and extended monitoring.
  • Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity.
  • Utilizes advanced ArmorTek coating technology to resist microbial-induced corrosion (MIC) and protect exposed metal substrate.
  • Cast iron body construction with patented 3-part advanced epoxy coating system.
  • Unique patented air-in and water-out relief valve design provides high capacity relief valve discharge performance during emergency conditions.
  • Includes outside stem and yoke (OSY) resilient seated gate valves.
  • Features replaceable seats and stainless steel internal parts for ease of maintenance.
  • Captured spring check assemblies and fused epoxy coated and lined checks.
  • Field reversible pressure differential relief valve.
  • An add-on connection kit is required to activate the flood sensor's alert features; without it, the sensor operates as a passive component.

Specifications

  • Size: 10 inch
  • Body Material: Cast Iron
  • Coating: ArmorTek Powder Coating (3-part advanced epoxy)
  • Seat Material: Stainless Steel
  • Trim Material: Stainless Steel
  • Relief Valve Body Material: Cast Iron
  • Test Cock Material: Lead Free* Copper Silicon Alloy
  • Shutoff Valves: Outside Stem and Yoke (OSY)
  • Maximum Working Pressure: 175 psi (12.06 bar)
  • Continuous Temperature Range: 33°F to 110°F (0.5°C to 43°C)
  • Intermittent Temperature Range: 140°F (60°C)
  • Lead Content: Wetted surface contains less than 0.25% lead by weight

Certificates & Approvals

  • ASSE Std. 1013
  • AWWA C511-92
  • CSA B64.5
  • UL Classified File No. EX3185
  • IAPMO (UPC)
  • SBCCI (Standard Plumbing Code)
  • USC Manual for Cross-Connection Control, 8th Edition
  • NSF Certified to NSF/ANSI 61-G

FAQs

What is the primary function of the Watts LF909 backflow preventer?

This backflow preventer is designed to protect potable water supplies from contamination caused by backsiphonage and backpressure, making it suitable for health hazard cross-connections and continuous pressure applications.

What is ArmorTek coating and why is it important?

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

How does the flood sensor work and what does it require?

The integrated flood sensor with SentryPlus Alert technology detects continuous water discharge from the relief valve. To activate its alert features and enable communication to facility personnel or building management systems, an add-on connection kit is required.

Is this backflow preventer compliant with lead-free regulations?

Yes, the Watts LF909 Series features Lead Free* construction. The wetted surfaces of this product that contact consumable water contain less than 0.25% lead by weight, complying with Lead Free installation requirements.

What types of shutoff valves are included with this assembly?

This 10-inch assembly includes Outside Stem and Yoke (OSY) resilient seated gate valves, which are commonly used to provide a visual indication of whether the valve is open or closed.

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