4 LF957NRPDA-BFG-GPM

Item Number: 0124759
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$14,435.70
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Lead Free* construction (wetted surface < 0.25% lead)
  • Weight: 97.0 lb
  • Nominal Size: 4 inch
  • Maximum Working Pressure: 175 PSI
  • Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Equipped with UL Classified and FM Approved grooved gear operated butterfly valves
  • Includes Gallons per Minute (GPM) meter for bypass flow monitoring
  • Approved for horizontal N pattern installation
  • Flood sensor on relief valve for discharge detection

Description

The 4 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly, model LF957NRPDA-BFG-GPM, protects potable water systems from contamination due to backsiphonage and backpressure, meeting national plumbing codes. This assembly prevents reverse flow of non-potable water and fire protection substances, making it suitable for fire sprinkler systems and other health hazard cross-connections. Key features include a durable 304 stainless steel housing, UL Classified and FM Approved grooved gear operated butterfly valves, and a gallon per minute meter for leak detection. Its compact, lightweight design allows for horizontal N pattern installation. Item number 0124759.

Help Me Connect

Installation Orientation

  • This assembly is approved for horizontal N pattern installation.

Connections

  • The assembly utilizes groove fittings for integral pipeline adjustment and connections.
  • It is equipped with grooved gear operated butterfly valves with tamper switch for shutoff.

Flood Sensor Activation

  • An add-on sensor connection kit is required to activate the flood sensor's communication capabilities.
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Additional Details

This 4 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly, model LF957NRPDA-BFG-GPM, is designed to protect potable water systems from contamination due to backsiphonage and backpressure.

It is specifically engineered to prevent the reverse flow of fire protection substances and non-potable water, suitable for health hazard cross-connections like fire sprinkler systems, and includes a gallon per minute meter for detecting leaks and unauthorized water use.

Key Features

  • Lead Free* construction (*wetted surface contacted by consumable water contains less than 0.25% of lead by weight)
  • Extremely compact design, 70% lighter than traditional designs
  • 304 (Schedule 40) stainless steel housing & sleeve
  • Groove fittings allow integral pipeline adjustment
  • Patented torsion spring check provides lowest pressure loss
  • Unmatched ease of serviceability with replaceable check disc rubber
  • Equipped with UL Classified and FM Approved grooved gear operated butterfly valves with tamper switch
  • Includes a gallon per minute meter for bypass flow monitoring
  • Approved for horizontal N pattern installation
  • Features a flood sensor on the relief valve to detect excessive water discharges

An add-on connection kit is required to activate the flood sensor. Without the connection kit, the sensor is a passive component that has no communication with any any other device.

Specifications

  • Product Type: Reduced Pressure Detector Backflow Preventer Assembly
  • Nominal Size: 4 inch
  • Model: LF957NRPDA-BFG-GPM
  • Installation Pattern: Horizontal N-Pattern
  • Meter Type: Gallons per Minute (GPM)

Materials

  • Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Elastomers: EPDM, Silicone, Buna 'N'
  • Torsion Spring Checks Material: Noryl®, Stainless Steel
  • Check Discs Material: Reversible Silicone or EPDM
  • Test Cocks Material: Lead Free* Bronze Body
  • Pins & Fasteners Material: 300 Series Stainless Steel
  • Springs Material: Stainless Steel

Performance

  • Temperature Range: 33°F - 110°F (0.5°C - 43°C)
  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Wetted Surface Lead Content: Less than 0.25%

Certificates & Approvals

  • Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC) (excluding 6", 8", and 10" N- and Z-pattern installations)
  • AWWA C511-97
  • ASSE 1047
  • CSA B64.4
  • UL Classified
  • FM Approved
  • NSF/ANSI 372 Certified
  • UL Classified and FM Approved grooved gear operated butterfly valves with tamper switch

FAQs

What is the main function of the Watts LF957NRPDA-BFG-GPM assembly?

This 4 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly is designed to prevent the reverse flow of non-potable water and fire protection substances into the potable water supply, protecting against backsiphonage and backpressure.

What are the key components of this backflow preventer?

The assembly consists of a 304 stainless steel body with a quick access sleeve, two independent torsion spring check valves, grooved gear operated butterfly valves with tamper switch, test cocks, a bottom mounted pressure relief valve, and a gallon per minute meter. It also includes a flood sensor on the relief valve.

What does "Lead Free" mean for this product?

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

What are the maximum operating pressure and temperature limits for this assembly?

This assembly has a maximum working pressure of 175 PSI (12.1 bar) and an operating temperature range of 33°F to 110°F (0.5°C to 43°C).

How does the flood sensor function on this model?

The flood sensor detects excessive water discharges from the relief valve and relays a signal for notification. To activate its communication capabilities with other devices, an add-on sensor connection kit is required.

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