Suitable for Horizontal, Vertical, or N-Pattern Installation
Approved by ASSE, AWWA, CSA, cULus, FM, NSF, FCCCHR-USC
Description
The Watts 8 inch LF757DCDA Lead Free Double Check Detector Backflow Preventer Assembly is designed to protect potable water systems from non-health hazard pollutants. This compact unit features a durable 304 stainless steel housing and sleeve, with OSY shutoff valves. It includes a gallons per minute metered bypass for detecting leaks and unauthorized water use, making it ideal for fire line sprinkler systems. Approved for horizontal, vertical, or N-pattern installations, it offers easy serviceability without special tools. The assembly has a maximum working pressure of 175 PSI and is approved by multiple agencies including ASSE, AWWA, CSA, cULus, FM, NSF, and FCCCHR-USC.
Help Me Connect
Connections
This assembly features groove end connections for easy installation and integral pipeline adjustment.
Equipped with Domestic OSY (Outside Stem and Yoke) resilient seated gate valves for reliable shutoff.
This 8 inch Watts LF757DCDA Lead Free Double Check Detector Backflow Preventer Assembly is designed to prevent the reverse flow of non-health hazard pollutants from entering the potable water supply system.
It is primarily used on fire line sprinkler systems where it is necessary to monitor unauthorized water use and is ideal for protection at cross-connections identified as non-health hazards.
Features
Lead Free* construction with wetted surfaces containing less than 0.25% lead by weight
Extremely compact design, 70% lighter than traditional designs
Groove fittings allow integral pipeline adjustment
Unique tri-link spring check provides lowest pressure loss
Unmatched ease of serviceability without special tools
Available with domestic OSY (Outside Stem and Yoke) resilient seated gate valves
May be used for horizontal, vertical or N pattern installations
Replaceable check disc rubber
Includes a gallons per minute metered bypass to detect underground leaks and unauthorized water use
NOTICE: The information contained herein is not intended to replace the full product installation and safety information available or the experience of a trained product installer. You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this product.
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 (BFG & OSY Only)
FM Approved (BFG & OSY Only)
NSF Certified to NSF/ANSI 372
FAQs
What is the primary use of the Watts LF757DCDA backflow preventer?
It is used to prevent the backflow of non-health hazard pollutants into potable water supply systems, primarily for fire line sprinkler systems to monitor unauthorized water use.
What material is the housing and sleeve made from?
The housing and sleeve are constructed from durable 304 Schedule 40 stainless steel, providing robust protection and longevity for the assembly.
What is the maximum operating pressure and temperature range for this assembly?
The Watts LF757DCDA has a maximum working pressure of 175 PSI (12.1 bar), and it operates efficiently within a temperature range of 33°F to 140°F (0.5°C to 60°C).
What are the benefits of the metered bypass included with this assembly?
The gallons per minute metered bypass assembly helps detect underground leaks and unauthorized water usage. This feature is crucial for maintaining system integrity and monitoring fire line sprinkler systems.
Are special tools required for servicing the check modules?
No, the unique tri-link check modules are designed to be removable and serviceable without the use of special tools, which simplifies maintenance and reduces downtime.
