LF909 Large
Discontinued
Lead Free* Reduced Pressure Valve Assembly Backflow Preventers - Large Diameter 2-1/2 - 10 Inch Sizes
Series LF909 Large reduced pressure valve assembly backflow preventer is designed to prevent 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. These large diameter backflow preventers are available in 2-1/2 to 10 inch sizes.
Series LF909 Large is also available with SentryPlus™ Alert technology to detect catastrophic relief valve discharge that could potentially cause flooding, and issue a multi-channel alert (e-mail, text, and voice notifications) to selected users so they can take action to avoid potentially costly flooding.
For existing LF909 Large models currently in the field, SentryPlus Alert universal upgrade kits are available to connect to the SentryPlus Alert system and activate for alerts.
The coating on this backflow assembly uses ArmorTek™ technology to resist corrosion due to microbial induced corrosion (MIC) or exposed metal substrate. ArmorTek advanced coating system is made of an anti-corrosion primer, a microbial inhibitor to limit MIC, and a protective epoxy-polyester topcoat.
Features
- Coated with advanced ArmorTek coating technology for 6x less surface rusting
- Available with SentryPlus Alert™ Technology for flood detection alert capabilities
Literature
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- Brochure - Automated Flood Protection
- Installation Instructions - 909 Large, LF909 Large, 909RPDA
- Installation Instructions - SentryPlus Alert Technology (June 2020 - Present)
- Relief Valve Discharge Rates - 009, 909, 919, 957, 994
- Specification Sheet - LF909 (2-1/2 to 10 IN)
- Specification Sheet - NYC Backflow Specialty Items
- Specification Sheet - SentryPlus Alert Upgrade Kit
- Specification Sheet - Watts Air Gaps, Elbows and Test Cocks
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Approval/Certification Information
For product-specific approval information, please refer to the product’s specification sheet 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 |