LF909 Small

Lead Free* Reduced Pressure Valve Assembly Backflow Preventers with Flood Sensor - Small Diameter 3/4 - 2 IN Sizes

LF909 Small

Lead Free* Reduced Pressure Valve Assembly Backflow Preventers with Flood Sensor - Small Diameter 3/4 - 2 IN Sizes

Features

Sensor on the relief valve for flood detection
Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by W-Fi connectivity
Exclusive relief valve design provides maximum capacity during emergency conditions
Compact modular design facilitates easy maintenance for in-line repairs
Horizontal or vertical (up or down) installation
No special tools required for servicing

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Nexa pairs integrated sensing hardware with free, upgradable software to empower facilities with unprecedented visibility and control over their water systems, helping teams protect assets, deliver consistent performance, and drive measurable ROI.
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Series LF909 Small Lead Free* Reduced Pressure Zone assemblies feature a flood sensor using SentryPlus Alert® technology to detect continuous discharge from the relief valve. When paired with an add on connection kit, the sensor is activated to relay alerts for potential flooding events. Connection kit options include BMS, cellular communication, and the Sensor Control Monitor which enables integration with BAS via RS-485 Modbus or the Nexa® platform through Wi-Fi.

This series prevents the reverse flow of contaminated water caused by backsiphonage or backpressure from entering the potable water supply. Ideal for protection at health hazard cross-connections or for containment at the service line entrance. Its compact modular design facilitates maintenance and assembly access. Check with local water authorities for installation requirements.

To learn more visit: https://www.watts.com/floodprotectionsystem

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. Some certification agencies allow you to search by product name and brand.

Literature

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Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF909 Small

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Model	Used On - Series or Model	Kit Contents
FP-BF-BMS 2 1/2-10 Activation Kit	</br>009, LF009, 909, LF909, 909RPDA, LF919, 957, 957RPDA, LF957RPDA, 994, 994RPDA, C400, C500, LFC500, 4000SS, 5000SS, Deringer 40/40G, Deringer 40X/40GX, Deringer 50/50G, Deringer 50X/50GX</br>	Sensor Activation Module with Cable, Ground Wire, Power Adapter</br>
FP-BF-CFS 2 1/2-10 Activation Kit	</br>009, LF009, 909, LF909, 909RPDA, LF919, 957, 957RPDA, LF957RPDA, 994, 994RPDA, C400, C500, LFC500, 4000SS, 5000SS</br>	Sensor Activation Module with Cable, Cellular Gateway with Mounting Kit, Ground Wire, Power Adapter</br>
FP-BF-SA-009-1-11/2 M2 Upgrade/Repair Kit	009</br></br>	Flood Sensor and Mounting Bolts</br>
SCM-BF-CONN KIT Activation Kit	</br>Watts 009/LF009, LF909, LF919, 909RPDA, 957, 957RPDA, 994, 994RPDA; Ames C400, C500, 5000SS, 4000SS, FEBCO LF860, 825Y, LF825Y, LF866, LF880V, LF886V</br>	Sensor Control Monitor, Power Adapter, Mounting Feet, and Quick Start Guide</br>
LFRK 909-PC-CK1 3/4-1 First Check Kit	</br>909</br>	Disc Assembly, Seat, Seat O-ring, Sleeve, Check Spring, PC Cover, Cover O-ring</br>
LFRK 909-VT 3/4-1 Total Relief Valve Kit	</br>LF909, 909</br>	Relief Valve Assembly, Seat, Seat O-ring, 2 Piston O-rings, Lubricant</br>
FP-BF-SA-009/909 2-3 M2 Upgrade/Repair Kit	009, 909, 909RPDA</br></br>	Flood Sensor and 2 Sets of Mounting Bolts</br>
LFRK 909-RC3-HW 1 1/4-2 Check Rubber Parts Kit	</br>909M1</br>	Bronze Disc Assembly, Seat O-ring, Cover O-ring, Lubricant</br>