Corrosion Resistance: Microbial-induced (MIC) and electrochemical
Shutoff Valves: OSY resilient seated gate valves
Bypass Meter: 5/8" x 3/4" bronze GPM meter
Maximum Working Pressure: 175 psi
Application: Non-health hazard cross-connections
Description
The Watts 3 inch 709DCDA Double Check Detector Assembly prevents backflow of non-potable water and fire protection substances into potable water lines. Featuring a durable fused epoxy coated cast iron body with patented ArmorTek® coating, it offers superior resistance to microbial-induced corrosion. This assembly includes UL Classified and FM Approved OSY shutoff valves and a gallons per minute bypass meter for leak detection. Ideal for non-health hazard cross-connections, it provides reliable protection with easy maintenance.
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Installation Guidelines
This 3 inch double check detector assembly is designed for horizontal installation only.
It is mandatory for installation on fire protection systems when connected to a potable water supply.
The unit is designed to protect potable water lines from the reverse flow of non-potable substances such as glycerin wetting agents or stagnant water.
Consult local authorities for specific installation requirements and degree of hazard determination.
This 3 inch double check detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality into the potable water supply.
It is ideal for protection at cross-connections identified as non-health hazards, such as on fire protection systems and from other contaminants found at the service line entrance.
Construction & Design
Features a fused epoxy coated cast iron body.
Equipped with domestic outside stem and yoke (OSY) resilient seated gate valves.
Includes captured spring check valves.
Incorporates a gallons per minute (GPM) metered bypass to detect underground leaks and unauthorized water use.
Modular check design concept facilitates complete maintenance and assembly access.
No special tools required for servicing.
Corrosion Protection
Utilizes ArmorTek® coating technology, a patented three-part advanced epoxy system engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrate.
Coating applied to both internal and external surfaces.
Approved by the Foundation for Cross-Connection Control and Hydraulic Research at the University of Southern California
CSA B64.4
FAQs
What is the primary function of the Watts 709DCDA Double Check Detector Assembly?
Its primary function is to prevent the reverse flow of fire protection system substances and non-potable water into the potable water supply, protecting against both backsiphonage and backpressure.
What is ArmorTek® coating and what are its benefits?
ArmorTek® is a patented three-part advanced epoxy system applied to the internal and external surfaces of the cast iron components. It is engineered to reduce microbial-induced corrosion (MIC) and protect exposed metal substrates, enhancing the longevity of the assembly.
What type of applications is this backflow preventer suitable for?
This assembly is ideal for cross-connections identified as non-health hazards, such as those found on fire protection systems and at service line entrances where contaminants could be present.
Does this 3 inch model have any specific installation requirements regarding orientation?
Yes, the 3 inch model of the 709DCDA Double Check Detector Assembly is approved and designed for horizontal installation only.
What is the purpose of the bypass meter included with this assembly?
The 5/8" x 3/4" bronze gallons per minute (GPM) bypass meter is designed to detect underground leaks that could lead to unaccountable water loss and to identify unauthorized water use.
