The Watts 709DCDA-LF-GPM 4 is a 4" lead-free double check detector assembly (DCDA), approved for low health hazard protection. It features a cast iron body and a rubber seat. Rated to 175 psi and 33°F to 110°F. This model is certified lead-free for potable-water installations.
This 4" double check detector backflow preventer assembly prevents backflow of non-health hazard fire protection system substances from being pumped or siphoned into the potable water supply. It incorporates a gallons per minute meter to detect ground leaks and unauthorized illegal taps, greatly reducing annual water expenses. It consists of a fused epoxy coated cast iron body construction. Its modular check design facilitate simple and easy installation and maintenance. The coating on this backflow assembly uses ArmorTek®, a patented 3-part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion. Maximum working pressure is 175 psi (12.06 bar).
Features
- Utilizes advanced ArmorTek coating technology to resist corrosion of internals
- Cast iron body construction with patented 3-part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion
- Modular check assemblies
- Detector bypass
- No shutoff valves
- Includes: Bypass
Common Questions
- What hazard level is this DCDA approved for?
- It is rated for low health hazard (non-toxic, "pollutant") cross-connections only. Where the substance downstream could be a health hazard, codes require a reduced pressure zone (RPZ) assembly instead. The assembly is listed to ASSE 1048.
- Is this model legal for potable water?
- Yes. It is certified lead-free to NSF/ANSI 372, which is what state plumbing codes require for any device in a drinking-water line.
- Does this assembly have to be tested every year?
- Yes. This is a field-testable assembly. Most water authorities require it to be tested and certified by a licensed backflow tester at installation and annually thereafter. It carries USC FCCCHR approval, which many jurisdictions accept as their sole approval list.
- Does this ship with inlet and outlet shutoff valves?
- No. This is the "less valves" (LF) configuration — the assembly ships without inlet and outlet shutoffs. Most jurisdictions require approved shutoffs on both sides, so order them separately or choose a QT, NRS, OSY or BFG variant of this model.
- Is this suitable for a fire sprinkler line?
- Yes. Detector assemblies are built for fire sprinkler service: the metered bypass registers the low flows that reveal a leak or an unauthorized tap on the fire line. This model is UL Classified and FM Approved. The bypass meter reads in GPM.
Specifications
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Type: Double Check
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Size: 4"
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Inlet Size: 4"
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Outlet Size: 4"
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Body Material: Cast Iron
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Seat / Seal Material: Rubber
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Max Pressure (psi): 175
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Application: Fire Protection
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Backflow Protection: Backpressure
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Operation: Continuous
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Country of Origin: United States
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Warranty: 1 Year Limited
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MPN: 709DCDA-LF-GPM 4
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Temperature: 33°F to 110°F
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Certifications: ASSE-1048, UL, FM, USC
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Lead-Free: Yes
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Assembly Type: DCDA
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Hazard Protection Level: Low Health Hazard
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ASSE Standard: ASSE 1048
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USC FCCCHR Approved: Yes
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Fire Protection Listing: UL Classified;FM Approved
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Field Testable: Yes
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Shutoff Valves: None
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Flood Sensor (SentryPlus Alert): No
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Strainer Included: No
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Air Gap Fitting Included: No
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Bypass Meter: GPM
