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 Double Check Detector Assemblies.
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Watts Series 007/709DCDA
Double check valve assembly
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007DCDA
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709DCDA
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 Series 007DCDA Double Check Detector Assembly
SIZE RANGE: 2" through 3".
Series 007DCDA Double Check Detector Assemblies are designed exclusively for use in accordance with water utility authority containment requirements on non-health hazard applications. It is mandatory to prevent the reverse flow of fire protection system substances, i.e., glycerin wetting agents, stagnant water and water of non-potable quality, from being pumped or siphoned into the potable water line.
Series709DCDA Double Check Detector Assembly
SIZE RANGE: 3" through 10".
Series 709 Double Check Valve Assemblies are designed to prevent the reverse flow of polluted water from entering into the potable water system. This Series can be applied, where approved by the local authority having jurisdiction, on non-health hazard installations. Series 709 features a modular check design concept to facilitate easy maintenance.
Pressure — Temperature
Temperature Range: 33°F – 110°F (5°C – 43°C) continuous, 140°F (60°C) intermittent.
Maximum Working Pressure: 175psi (12.06 bars)
 007DCDA Data Sheet (pdf), - 709DCDA Data Sheet (pdf)
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Watts Series 774DCDA
Double check Detector assembly
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774DCDA
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774xDCDA
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 Series 774 Double Check Detector Assembly
SIZE RANGE: 2½" through 12" 774DCDA, 6" & 8" 774XDCDA
Series 774DCDA, 774XDCDA Double Check Detector Assemblies are designed for use in accordance with water utility containment requirements. It is mandatory to prevent the reverse flow of fire protection system substances, i.e., glycerin wetting agents, stagnant water and water of non-potable quality from being pumped or siphoned into the potable water supply. These models can be applied where approved by the local authority having jurisdiction on non-health hazard installations.
Pressure / Temperature
Suitable for supply pressure up to 175psi (12 bars) and water temperature
up to 180°F (82°C) continuous.
774DCDA Data Sheet (pdf), - 774xDCDA Data Sheet (pdf)
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Silver Eagle Series 757DCDA
Double check Detector assembly
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SIZE RANGE: 2½" through 10".
Watts SilverEagle Series are the lightest and most compact backflow prevention assemblies in the industry. Series 757DCDA/757NDCDA Double Check Detector Assemblies are used to prevent backflow of non-health hazard pollutants that are objectionable but not toxic, from entering the potable water supply system. The 757DCDA/757NDCDA may be installed under continuous pressure service and may be subjected to backpressure and backsiphonage. Series 757DCDA/ 757NDCDA is used primarily on fire line sprinkler systems when it is necessary to monitor unauthorized use of water.
Pressure / Temperature
Temperature Range: 33°F – 140°F (5°C – 60°C)
Maximum Working Pressure: 175psi (12.06 bars)
757DCDA Data Sheet (pdf)
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DCDA
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2½"
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3"
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4"
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6"
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8"
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10"
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757DCDA OSY
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757DCDA BFG
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E-mail: nni_inc@hotmail.com
Phone: 305-687-3330
Copyright © 2001 NNI INC. All rights reserved.
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