Corrosion resistance for internal and external surfaces
Description
This 8 inch Watts 709DCDA-LF-GPM Double Check Detector Backflow Preventer Assembly is engineered to prevent the backflow of non-health hazard substances into potable water supplies from fire protection systems. Its robust cast iron body features ArmorTek® epoxy coating for superior resistance to microbial-induced corrosion and rust. The integrated gallons per minute (GPM) meter allows for precise leak detection and monitoring of unauthorized water usage, helping to reduce water waste. Designed for easy maintenance with modular checks, it is approved for horizontal and vertical flow-up installations, meeting AWWA C510, ASSE 1048, UL, FM, and CSA B64.4 standards with a maximum working pressure of 175 psi.
Help Me Connect
Installation Orientation
This 8 inch assembly is approved for installation in both horizontal and vertical flow-up orientations.
Primary Use
Designed for installation on fire protection systems when connected to a potable water supply to prevent backflow of non-health hazard substances.
This 8 inch Double Check Detector Backflow Preventer Assembly is designed to prevent the reverse flow of non-health hazard fire protection system substances into a potable water supply. It incorporates a gallons per minute meter for detecting ground leaks and unauthorized water usage.
Key Features
Cast iron body construction with fused epoxy coating.
Features ArmorTek® coating technology, a patented 3-part advanced epoxy system, to resist microbial-induced corrosion (MIC) and protect exposed metal surfaces.
Modular check design facilitates simple installation and easy maintenance.
Detects ground leaks and unauthorized taps, helping to reduce water expenses.
Designed for maximum flow at low pressure drop.
No special tools required for servicing.
Always thoroughly read all installation instructions and product safety information before beginning installation. Inquire with governing authorities for local installation requirements.
Coating: ArmorTek® Powder Coating (internal and external surfaces)
Seat Material: Bronze
Disc Holder Material: Bronze
Trim Material: Stainless Steel
Check Valve Disc Material: Rubber
Test Cock Material: Bronze
Meter Type: Gallons per Minute (GPM)
Performance
Maximum Working Pressure: 175 psi (12.1 bar)
Continuous Temperature Range: 33°F – 110°F (0.5°C – 43°C)
Intermittent Temperature Range: 140°F (60°C)
Dimensions
Overall Length (A): 75 in (1905 mm)
Center-to-Center (C): 37 3/4 in (959 mm)
Overall Height (E): 26 in (660 mm)
Certificates & Approvals
AWWA Standard: C510
ASSE Standard: 1048
UL Classified
FM Approved
CSA B64.4
Approved by Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
FAQs
What is the primary function of the Watts 8 inch 709DCDA-LF-GPM backflow preventer?
Its primary function is to prevent the reverse flow of non-health hazard substances, typically from fire protection systems, into the potable drinking water supply.
How does the ArmorTek® coating benefit this backflow preventer?
The ArmorTek® coating is a patented three-part advanced epoxy system applied to the cast iron body. It is engineered to resist microbial-induced corrosion (MIC) and protect exposed metal substrate from rust.
Does this model include shutoff valves?
No, this specific 8 inch 709DCDA-LF-GPM model is supplied without shutoff valves, as indicated by the "LF" designation for sizes 4"-10".
What is the purpose of the gallons per minute (GPM) meter?
The integrated gallons per minute meter is used to detect underground leaks and identify unauthorized water usage or illegal taps. This feature helps utilities and property owners monitor and reduce unaccountable water loss.
What are the approved installation orientations for this 8 inch backflow preventer?
This 8 inch assembly is approved for installation in both horizontal and vertical "flow-up" orientations, providing flexibility for different piping configurations.
