4 LF909LF NYC-FS

Item Number: 88009409
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$15,249.75
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 4 inch
  • Weight: 333.0 lb
  • Assembly Type: Reduced Pressure Zone Backflow Preventer
  • Lead Free: Yes
  • Body Material: Cast Iron with ArmorTek® Coating
  • Flood Sensor: SentryPlus Alert® Technology
  • Maximum Working Pressure: 175 PSI
  • NYC Compliant: Pre-drilled bolts & discharge restrictor plate
  • Relief Valve: Air-in/Water-out design

Description

This 4 inch Lead Free Reduced Pressure Zone Backflow Preventer Assembly (LF909) prevents polluted water from entering potable water supplies due to backsiphonage and backpressure. It features a durable cast iron body with advanced ArmorTek® coating for superior corrosion resistance and a flood sensor with SentryPlus Alert® technology for discharge detection. Designed for installations without shutoff valves, it includes a relief valve flow restrictor and pre-drilled 304 stainless steel bolts for NYC specifications. Operating at up to 175 PSI and 33-110°F continuous, it ensures reliable cross-connection control. Item number 88009409.

Help Me Connect

Flood Sensor Connectivity

  • The integrated flood sensor with SentryPlus Alert® technology requires an add-on sensor connection kit to activate its alert features.
  • The add-on connection kit is compatible with Building Management Systems (BMS) and cellular network communication for remote notifications.

Installation Notes

  • Installation of a drain line is recommended for relief valve discharge.
  • Ensure an air gap is maintained when installing a drain line.
  • This assembly features flanged connections and includes four sets of pre-drilled 304 stainless steel bolts/nuts for secure installation.
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Additional Details

This 4 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 and/or backpressure. It is suitable for cross-connection control in a variety of installations.

Features

  • Lead Free* construction complies with Lead Free* installation requirements.
  • ArmorTek® coating technology protects internal and external surfaces against microbial-induced corrosion (MIC) and exposed metal substrate corrosion.
  • Flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve, with alerts activated via an add-on connection kit (not included).
  • Includes a relief valve flow restrictor plate to limit discharge.
  • Equipped with four sets of 304 stainless steel bolts/nuts, pre-drilled with a 1/4 inch hole axially through the bolts, suitable for NYC specifications.
  • Utilizes a unique air-in/water-out relief valve design for maximum capacity during emergency conditions.
  • Features replaceable seats and stainless steel internal parts for easy servicing.
  • Captured spring check assemblies and fused epoxy coated and lined checks enhance durability.
  • Designed for installations without shutoff valves.

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Specifications

  • Assembly Type: Reduced Pressure Zone Backflow Preventer
  • Size: 4 inch
  • Lead Free: Yes
  • Shutoffs: None (without gate valves)
  • Body Material: Cast Iron
  • Coating: ArmorTek® Powder Coating (internal and external surfaces)
  • Seat Material: Stainless Steel
  • Trim Material: Stainless Steel
  • Relief Valve Body Material: Cast Iron
  • Test Cock Material: Lead Free* Copper Silicon Alloy
  • Temperature Range (Continuous): 33°F to 110°F (0.5°C to 43°C)
  • Temperature Range (Intermittent): Up to 140°F (60°C)
  • Maximum Working Pressure: 175 PSI (12.06 bar)

Certificates & Approvals

  • ASSE Standard 1013
  • AWWA Standard C511-92
  • CSA B64.5
  • IAPMO PS 31
  • SBCCI (Standard Plumbing Code)
  • USC Manual for Cross-Connection Control, 8th Edition
  • UL Classified File No. EX3185
  • NSF Certified to NSF/ANSI 61-G
  • Approved by Foundation for Cross-Connection Control and Hydraulic Research at University of Southern California

FAQs

What is the primary function of this backflow preventer?

This 4 inch Reduced Pressure Zone Backflow Preventer Assembly is designed to prevent the reverse flow of polluted water into the potable water supply, protecting against both backsiphonage and backpressure conditions.

Does this backflow preventer include shutoff valves?

No, this particular model (LF909LF NYC-FS) is supplied without shutoff valves, as indicated by its "No Shutoff" configuration.

What is ArmorTek® coating and what are its benefits?

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

How does the flood sensor work and what is required to activate it?

The flood sensor with SentryPlus Alert® technology detects excessive water discharges from the relief valve. To activate its notification features, an add-on sensor connection kit is required, which is sold separately and is compatible with BMS and cellular networks.

What does "Lead Free" mean for this product?

"Lead Free" means that the wetted surface of this product, which comes into contact with consumable water, contains less than 0.25% of lead by weight, complying with Lead Free installation requirements.

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