957
Discontinued - Replaced By: 957-FS
Reduced Pressure Valve Assembly Backflow Preventers Sizes: 2½ - 10Inch (65 – 250mm)
Series 957, 957N, 957Z Reduced Pressure Valve Assembly Backflow Preventers are designed to prevent the reverse flow of liquids in a plumbing system due to backpressure or backsiphonage where there is a potential health hazard. Compact design and lightweight stainless steel construction (70% lighter than traditional designs) makes installation easier and faster. Groove connections also ease installation and pipe alignment. A variety of shutoff valve options are available.
Series 957 is also available with SentryPlus Alert® technology to detect catastrophic relief valve discharge that could potentially cause flooding, and issue a multi-channel alert (call, email, text) to selected users so they can take action to avoid potentially costly flooding.
Flood alert feature available with add-on retrofit connection kit, compatible with BMS and cellular communication.
Features
- Available with SentryPlus Alert™ Technology for flood detection alert capabilities
- Extremely compact and lightweight design is easy to install and service
- Bottom-mounted cast stainless steel relief valve. Replaceable check disc rubber
- Patented torsion spring checks provide lowest pressure loss
- Health hazard protection level
Literature
-
- 957, 957RPDA, LF957RPDA - Repair Kits Parts Breakdown
- Brochure - Backflow Prevention - Cross-Connection Control Handbook
- Brochure - Backflow Prevention and Flow Control Plumbing
- Brochure - Backflow Protection with Series 957, 957RPDA
- Brochure - Backflow Retrofit Spool Simple Order Form
- Flyer - Flood Detection for RPZ/RPDA Backflow Preventers (French)
- Flyer - Flood Detection for RPZ/RPDA Backflow Preventers with Flood Sensor
- Installation Instructions - BMS Sensor Retrofit Connection Kit - 994, 957, 957RPDA, LF957RPDA, C400, C500, LFC500, 4000SS, 5000SS
- Installation Instructions - Cellular Sensor Retrofit Connection Kit - 994, 957, 957RPDA, LF957RPDA, C400, C500, LFC500, 4000SS, 5000SS
- Installation Instructions - SentryPlus Alert Technology (June 2020 - Present)
- Relief Valve Discharge Rates - 009, 909, 919, 957, 994
- Specification Sheet - 957, 957N, 957Z
- Specification Sheet - PVS-7000
- Specification Sheet - SentryPlus Alert Upgrade Kit
- Specification Sheet - Watts Air Gaps, Elbows and Test Cocks
Archived
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 |