10 LF757DCDA-OSY-GPM

Item Number: 0124694
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$28,133.82
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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
  • Weight: 936.0 lb
  • Lead Free* Construction
  • Housing Material: 304 Stainless Steel
  • Shutoff Valves: UL/FM OSY Gate
  • Maximum Working Pressure: 175 psi
  • Connection Type: Groove
  • Includes Gallons/Minute Meter
  • Installation: Horizontal, Vertical, or N Pattern

Description

A 10 inch Lead Free Double Check Detector Backflow Preventer Assembly by Watts, model LF757DCDA, prevents non-health hazard pollutants from entering potable water systems. Designed for continuous pressure service and protection against backpressure and backsiphonage, it is commonly used in fire sprinkler systems to monitor unauthorized water use via its integrated gallons per minute meter. Constructed from 304 Schedule 40 stainless steel, it is 70% lighter and more compact than traditional designs. It features UL/FM OSY gate shutoff valves, two tri-link check modules, and groove end connections. Maximum working pressure is 175 psi. Item number 0124694.

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Connections

  • This 10 inch backflow preventer assembly features groove end connections for integral pipeline adjustment and simplified installation.
  • It is equipped with UL/FM outside stem and yoke (OSY) resilient seated gate shutoff valves, compatible with grooved piping systems.
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Additional Details

The Watts Series LF757DCDA 10 inch Lead Free Double Check Detector Backflow Preventer Assembly is designed to prevent the backflow of non-health hazard pollutants from entering potable water supply systems.

This assembly is ideal for fire line sprinkler systems where monitoring unauthorized water use is necessary, operating under continuous pressure service against backpressure and backsiphonage.

Construction & Features

  • Features Lead Free* construction, with wetted surfaces containing less than 0.25% lead by weight.
  • Extremely compact design, up to 70% lighter than traditional models.
  • Housing and sleeve constructed from 304 (Schedule 40) stainless steel for durability and corrosion resistance.
  • Includes UL/FM outside stem and yoke (OSY) resilient seated gate shutoff valves.
  • Two independent tri-link check modules with reversible elastomer discs provide drip-tight closure and lowest pressure loss.
  • Groove fittings allow for integral pipeline adjustment and ease of serviceability without special tools.
  • Bypass assembly includes a gallons per minute meter for monitoring water flow.
  • Equipped with four test cocks.
  • Suitable for horizontal, vertical, or N pattern installations.

Specifications

  • Series: LF757DCDA
  • Size: 10 inch
  • Connection Type: Groove
  • Shutoff Valves: UL/FM OSY Resilient Seated Gate Valves
  • Check Modules: Two independent tri-link checks
  • Bypass Assembly: Includes Gallons/Minute Meter
  • Installation Pattern: Horizontal, Vertical, or N Pattern

Materials

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

Performance

  • Maximum Working Pressure: 175 psi (12.1 bar)
  • Temperature Range: 33°F – 140°F (0.5°C – 60°C)

Dimensions & Weight (Approximate)

  • Overall Length: 66 in
  • Weight: 795 lbs

Certificates & Approvals

  • AWWA C510-97
  • ASSE 1048
  • CSA B64.5
  • UL Classified
  • FM Approved
  • NSF Certified to NSF/ANSI 372
  • FCCCHR-USC Approved

FAQs

What is the primary purpose of the Watts LF757DCDA backflow preventer?

The primary purpose is to prevent the backflow of non-health hazard pollutants, which are objectionable but not toxic, from entering the potable water supply system. It is also used in fire line sprinkler systems to monitor water usage.

Does this backflow preventer include a meter for water monitoring?

Yes, the bypass assembly includes a gallons per minute (GPM) meter that registers water flow, allowing for monitoring of unauthorized water use in fire sprinkler systems.

What type of shutoff valves are included with this assembly?

This assembly comes with UL/FM outside stem and yoke (OSY) resilient seated gate shutoff valves, which are designed for reliable and visible open/closed indication.

What are the connection types for this 10 inch backflow preventer?

This backflow preventer features groove end connections on its 304 Schedule 40 stainless steel housing, which allows for integral pipeline adjustment and easy installation.

What is the maximum operating pressure and temperature range for this device?

The Watts LF757DCDA backflow preventer has a maximum working pressure of 175 psi (12.1 bar) and operates within a temperature range of 33°F to 140°F (0.5°C to 60°C).

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