909 Large
Discontinued - Replaced By: LF909 Large
Reduced Pressure Valve Assembly Backflow Preventers, Cast Iron, Large Diameter 2 1/2 - 10 Inch Sizes
Series 909 Large prevents the reverse flow of liquids in a plumbing system due to backpressure or backsiphonage where there is a potential health hazard. An exclusive relief valve design provides substantially improved relief valve discharge performance during emergency conditions of combined backsiphonage and backpressure. The seats are replaceable for economical repair. It consists of a cast iron body construction, bronze ball valve shutoffs, and bronze test cocks Large diameter 2 1/2 to 10 inch sizes.
The coating on this backflow assembly uses ArmorTek® technology, a patented 3-part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion.
To learn more visit: https://www.watts.com/armortek
Features
- Health hazard protection level
- Exclusive relief valve design provides maximum capacity during emergency conditions
- Industrial strength sensing hose on larger size models
- Can be used in a variety of installations, including containment at the service line entrance
- No special tools required for servicing
- The valve body shall utilize a coating system with built in electrochemical corrosion inhibitor and microbial inhibitor
- Utilizes advanced ArmorTek coating technology to resist corrosion of internals
Literature
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- Installation Instructions - 909 Large, LF909 Large, 909RPDA
- Installation Instructions - BMS Sensor Connection Kit - 909, LF909 Large, 909RPDA
- Installation Instructions - Cellular Sensor Connection Kit - 909, LF909 Large, 909RPDA
- Specification Sheet - Flood Sensor Connection Kit - Watts
- Specification Sheet - Flood Sensor Connection Kit - Watts (French)
- Specification Sheet - Flood Sensor Connection Kit - Watts (Spanish)
- Specification Sheet - Watts Air Gaps, Elbows and Test Cocks
- White Paper - ArmorTek Advanced Coating System
Select a Model
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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 |