2 1/2 LF757DCDA-BFG-GPM

Item Number: 0122734
1 1
$7,188.57
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: 924.0 lb
  • Lead Free* construction
  • Housing Material: 304 Stainless Steel
  • Maximum Working Pressure: 175 PSI
  • Temperature Range: 33°F to 140°F
  • Grooved butterfly valve shutoffs
  • Includes gallons/minute meter
  • UL, FM, ASSE, CSA, AWWA, NSF approved

Description

This Watts 2 1/2 inch Series LF757DCDA Lead Free Double Check Detector Backflow Preventer Assembly is designed to protect potable water systems from non-health hazard pollutants. Primarily used in fire line sprinkler systems, it features a 304 stainless steel housing, grooved butterfly valve shutoffs, and a bypass assembly with a gallons/minute meter for monitoring water usage. Its compact, lightweight design ensures easy installation in horizontal, vertical, or N pattern orientations. The assembly offers low pressure loss, unmatched serviceability, and is approved by UL, FM, ASSE, CSA, AWWA, and NSF.

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Connections & Installation

  • The assembly features groove end connections, allowing for integral pipeline adjustment and straightforward installation into existing systems.
  • Designed for versatility, it can be installed in horizontal, vertical, or N pattern orientations to suit various piping configurations.
  • This model includes grooved butterfly valve shutoffs, which facilitate isolation for maintenance or testing.
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Additional Details

The Watts Series LF757DCDA Double Check Detector Assembly is designed to prevent the backflow of non-health hazard pollutants into potable water supply systems.

This 2 1/2 inch lead free assembly is used primarily on fire line sprinkler systems where it is necessary to monitor unauthorized water use.

Construction & Features

  • Features Lead Free* construction, ensuring the wetted surface contains less than 0.25% lead by weight.
  • Extremely compact design, making it 70% lighter than traditional designs for easier installation and handling.
  • Housing and sleeve constructed from durable 304 (Schedule 40) stainless steel.
  • Groove fittings allow for integral pipeline adjustment and simplified installation.
  • Unique tri-link spring check design provides the lowest pressure loss.
  • Offers unmatched ease of serviceability with removable and serviceable tri-link checks that do not require special tools.
  • Equipped with grooved butterfly valve shutoffs and test cocks for easy maintenance and testing.
  • Includes a bypass assembly with a meter that registers in either gallons or cubic measurement, used to monitor water usage.
  • Features replaceable check disc rubber for extended service life.
  • May be used for horizontal, vertical, or N pattern installations.

Specifications

General

  • Size: 2 1/2 inch
  • Series: LF757DCDA
  • Model Suffix: BFG (UL/FM grooved gear operated butterfly valves with tamper switch)
  • Maximum Working Pressure: 175 PSI (12.1 bar)
  • Temperature Range: 33°F to 140°F (0.5°C to 60°C)

Materials

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

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
  • UL Classified
  • FM Approved
  • NSF Certified to NSF/ANSI 372

FAQs

What is the primary purpose of the Watts LF757DCDA Double Check Detector Assembly?

The primary purpose of this assembly is to prevent the backflow of non-health hazard pollutants into the potable water supply system. It is specifically used in fire line sprinkler systems to monitor unauthorized water usage.

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

"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. This ensures compliance with modern safety standards.

What materials are used for the main components of this backflow preventer?

The housing and sleeve are constructed from durable 304 (Schedule 40) stainless steel. Key elastomers like EPDM, Silicone, and Buna-N are used for seals, while the tri-link checks are made from Noryl® and stainless steel.

Can this backflow preventer be installed in different orientations?

Yes, the Watts LF757DCDA assembly is designed for versatile installation. It may be used for horizontal, vertical, or N pattern installations, providing flexibility for various piping layouts.

Does this model include a water meter for monitoring?

Yes, this specific LF757DCDA-BFG-GPM model includes a bypass assembly with a meter. This meter registers in either gallons or cubic measurement, allowing for effective monitoring of water usage in the system.

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