757DCDA
Double Check Detector Assembly Backflow Preventers, Stainless Steel
Series 757DCDA, 757NDCDA Double Check Detector Assemblies prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Compact housings consist of two independently operating tri-link check valves, two shutoff valves, and four test cocks. They feature a stainless steel housing and sleeve and are 70% lighter than traditional designs. Series 757, 757N is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. This Series is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. Maximum Working Pressure: 175psi (12.06 bar).
Features
- Bypass meter monitors unauthorized use of water
- Extremely compact and lightweight design
- Tri-link checks provide lowest pressure loss and produce drip-tight closure against reverse flow
- Grooved fittings allow for integral pipeline adjustment
Literature
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- 757, 757DCDA, LF757DCDA, 757Na, 757aDCDA - Repair Kits Parts Breakdown
- Brochure - Backflow Prevention and Flow Control Plumbing
- Brochure - Backflow Retrofit Spool Simple Order Form
- Installation Instructions - 757, 757DCDA, LF757DCDA
- Specification Sheet - 757DCDA, 757NDCDA
- Specification Sheet - LF757DCDA
Approval/Certification Information
For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:
| ASSE | CSA | FM Approvals | NSF |
| UL | ULC | USC | WQA |