2 1/2 LF757DCDA-OSY-GPM

Item Number: 0122714
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$9,005.30
Special Order
When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Size: 2 1/2 inch
  • Weight: 189.0 lb
  • Lead Free* construction
  • Housing & Sleeve Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 psi
  • Temperature Range: 33°F - 140°F
  • Includes Gallons per Minute (GPM) meter
  • OSY (Outside Stem and Yoke) shutoff valves
  • FM Approved and NSF Certified to NSF/ANSI 372

Description

This 2 1/2 inch Watts LF757DCDA-OSY-GPM Lead Free Double Check Detector Backflow Preventer Assembly is designed for non-health hazard applications, primarily in fire sprinkler systems, to monitor water use and prevent pollutant backflow into potable water. Featuring durable 304 stainless steel construction, OSY shutoff valves, and a gallons per minute meter, it offers a compact and lightweight design. The assembly is rated for a maximum working pressure of 175 psi and operates between 33°F and 140°F, ensuring reliable protection against backpressure and backsiphonage. Item number 0122714.

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Connections and Installation

  • This 2 1/2 inch backflow preventer features grooved end connections, allowing for integral pipeline adjustment and ease of installation.
  • The assembly is designed to be installed under continuous pressure service.
  • It is suitable for horizontal, vertical, or N pattern installations.
  • Equipped with two drip-tight OSY (Outside Stem and Yoke) shutoff valves and four test cocks for maintenance.
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Additional Details

This 2 1/2 inch Lead Free Double Check Detector Backflow Preventer Assembly with OSY shutoff valves is designed to prevent the backflow of non-health hazard pollutants into potable water supply systems. It is primarily used on fire line sprinkler systems where monitoring of unauthorized water use is necessary.

The assembly is suitable for continuous pressure service and protects against both backpressure and backsiphonage.

Key Features

  • Lead Free* construction with wetted surfaces containing less than 0.25% lead by weight.
  • Extremely compact design, approximately 70% lighter than traditional models.
  • Durable 304 Schedule 40 stainless steel housing and sleeve.
  • Equipped with two independent tri-link check modules for lowest pressure loss and unmatched ease of serviceability.
  • Includes a gallons per minute meter in the bypass assembly for monitoring.
  • Features grooved butterfly valve shutoffs or outside stem and yoke (OSY) gate valves.
  • Can be installed in horizontal, vertical, or N pattern orientations.
  • Incorporates reversible elastomer check discs and replaceable check disc rubber.
  • Includes four test cocks and two drip-tight shutoff valves.

Specifications

  • Size: 2 1/2 inch
  • Construction: Lead Free*
  • Housing & Sleeve Material: 304 (Schedule 40) Stainless Steel
  • Elastomers: EPDM, Silicone, Buna-N
  • Tri-link Checks Material: Noryl®, Stainless Steel
  • Check Discs: Reversible Silicone or EPDM
  • Test Cocks Body Material: Lead Free* Bronze
  • Pins & Fasteners Material: 300 Series Stainless Steel
  • Springs Material: Stainless Steel
  • Shutoff Valves: Outside Stem and Yoke (OSY) Gate Valves
  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F – 140°F (0.5°C – 60°C)
  • Meter: Gallons per Minute (GPM)

Certificates & Approvals

  • Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
  • AWWA C510-97
  • ASSE 1048
  • CSA B64.5
  • cULus Classified
  • FM Approved
  • NSF Certified to NSF/ANSI 372

FAQs

What is the primary application for this backflow preventer?

This backflow preventer is primarily used on fire line sprinkler systems where it is necessary to monitor unauthorized use of water, preventing non-health hazard pollutants from entering the potable water supply.

What does "Lead Free" construction mean for this product?

Lead Free construction means that the wetted surface of this product, which comes into contact with consumable water, contains less than 0.25% of lead by weight, meeting current safety standards.

What is the maximum working pressure and temperature range?

This assembly has a maximum working pressure of 175 psi (12.1 bar) and operates efficiently within a temperature range of 33°F to 140°F (0.5°C to 60°C).

What type of shutoff valves are included with this model?

This specific model, LF757DCDA-OSY-GPM, is equipped with UL/FM approved Outside Stem and Yoke (OSY) resilient seated gate valves.

Can this backflow preventer be installed in any orientation?

Yes, the Series LF757DCDA, LF757NDCDA assemblies may be used for horizontal, vertical, or N pattern installations, offering flexibility for various piping configurations.

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