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Product Image - Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Ball Valves, Backflow Flood Sensor
Product Image - Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Ball Valves, Backflow Flood Sensor
Product Image - LF919
Product Image - Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Ball Valves, Backflow Flood Sensor
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LF919

Lead Free* Reduced Pressure Zone Assembly Backflow Preventers with Flood Sensor, Sizes 1/2 to 2 IN

Features

  • Sensor on the relief valve for flood detection
  • Lead Free* cast copper silicon alloy body construction, two poppet-style check valves, replaceable check seats, and an intermediate relief valve
  • Maximum working pressure: 175 psi (12.06 bar)
  • Separate access covers for the check valves and relief valve
  • Bottom-mounted relief valve for reduced space requirements
  • Top-mounted test cocks reduce installation clearances and make testing easier
  • Innovative plastic seat guides and check valve plastic cover bushings for trouble-free guiding
  • Flood alert feature activated with add-on connection kit, compatible with BMS and cellular communication
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Series LF919 Lead Free* Reduced Pressure Zone assemblies feature a flood sensor with SentryPlus Alert® technology to detect excessive water discharges from the relief valve. Activated through an add-on connection kit, the sensor can trigger the alert system sending notification of flood detection to facility personnel. Connection kits are available for BMS and cellular communication.

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/

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF919

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Model Product Used On - Series or Model Kit Contents
88009418 Product Image
FP-BF-BMS 2 1/2-10

Activation Kit

</br></br>

Sensor Activation Module with Cable, Ground Wire, Power Adapter</br>
88009420 Product Image
FP-BF-CFS 2 1/2-10

Activation Kit

</br></br>

Sensor Activation Module with Cable, Cellular Gateway with Mounting Kit, Ground Wire, Power Adapter</br>
Product Image - Stand alone flood Sensors
FP-BF-SA-919-1/2-1

Upgrade/Repair Kit

</br></br>

Flood Sensor with 1 Screw</br>
0794146 Product Image
LFRK 919C 1

Cover Kit

</br></br>

Cover, Cover O-ring</br>
0794145 Product Image
LFRK 919-C 3/4-1

Cover Kit

</br></br>

Cover, Cover O-ring</br>
0794142 Product Image
LFRK 919VC 3/4-1

Relief Valve Cover Kit

</br></br>

Relief Valve Cover, Cover O-ring</br>
919 Product Image
RK 919-CK1 1

First Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
RK 919-CK2 1_0888117
RK 919-CK2 1

Second Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
Product Image - RK 919-RC4 1
RK 919-RC4 1

Check Rubber Parts Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
919 Product Image
RK 919-RT 1

Complete Rubber Parts Kit

</br></br>

2 Check Seat O-rings, 2 Check Cover O-rings, Relief Valve O-ring, Relief Valve Cover O-ring, Relief Valve Stem O-ring, Check Rubber, Relief Valve Diaphragm, Quad Ring, Relief Valve Disc</br>
0888135 Product Image
RK 919-RV 3/4-1

Relief Valve Rubber Parts Kit

</br></br>

Relief Valve Disc, RV Diaphragm, RV Seat O-ring, Cover O-ring</br>
Product Image - RK 919-S 1
RK 919-S 1

Seat Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
Product Image - RK 919-SV 3-4-1
RK 919-SV 3/4-1

Relief Valve Seat Kit

</br></br>

Relief Valve Seat, RV Seat O-ring, RV Cover O-ring</br>
919 Product Image
RK 919-T 1

Total Repair Kit

</br></br>

Relief Valve Repair Kit, First Check Repair Kit, Second Check Repair Kit</br>
Product Image - RK 919-VT 3-4-1
RK 919-VT 3/4-1

Total Relief Valve Kit

</br></br>

Relief Valve Assembly, RV Spring, RV Cover O-ring</br>
Product Image - Stand alone flood Sensors
FP-BF-SA-919-1 1/4-2

Upgrade/Repair Kit

</br></br>

Flood Sensor with 1 Screw</br>
0794147 Product Image
LFRK 919C 1 1/4-1 1/2

Cover Kit

</br></br>

Cover, Cover O-ring</br>
0794143 Product Image
LFRK 919VC 1 1/4-2

Relief Valve Cover Kit

</br></br>

Relief Valve Cover, Cover O-ring</br>
Product Image - RK 919-CK1 1-4-1-1-2
RK 919-CK1 1 1/4-1 1/2

First Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
RK 919-CK2 1 1-4 1-2_0888118_alt2
RK 919-CK2 1 1/4-1 1/2

Second Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
Product Image - RK 919-RC4 1 1-4 1-2
RK 919-RC4 1 1/4-1 1/2

Check Rubber Parts Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
0888143 Product Image
RK 919-RT 1 1/4-1 1/2

Complete Rubber Parts Kit

</br></br>

2 Check Seat O-rings, 2 Check Cover O-rings, Relief Valve O-ring, Relief Valve Cover O-ring, Relief Valve Stem O-ring, Check Rubber, Relief Valve Diaphragm, Quad Ring, Relief Valve Disc</br>
0888135 Product Image
RK 919-RV 1 1/4-2

Relief Valve Rubber Parts Kit

</br></br>

Relief Valve Disc, RV Diaphragm, RV Seat O-ring, Cover O-ring</br>
Product Image - RK 919-S 1 1-4-1 1-2
RK 919-S 1 1/4-1 1/2

Seat Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
Product Image - RK 919-S V 1 1-4-2
RK 919-SV 1 1/4-2

Relief Valve Seat Kit

</br></br>

Relief Valve Seat, RV Seat O-ring, RV Cover O-ring</br>
919 Product Image
RK 919-T 1 1/4-1 1/2

Total Repair Kit

</br></br>

Relief Valve Repair Kit, First Check Repair Kit, Second Check Repair Kit</br>
Product Image - RK 919-VT 1 1-4-2
RK 919-VT 1 1/4-2

Total Relief Valve Kit

</br></br>

Relief Valve Assembly, RV Spring, RV Cover O-ring</br>
0794144 Product Image
LFRK 919C 1/4-1/2

Cover Kit

</br></br>

Cover, Cover O-ring</br>
0888164 Product Image
LFRK 919-VC 1/4-1/2

Relief Valve Cover Kit

</br></br>

Relief Valve Cover, Cover O-ring</br>
Product Image - RK 919-CK1 1-4-1-2
RK 919-CK1 1/4-1/2

First Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
0888115 Product Image
RK 919-CK2 1/4-1/2

Second Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
Product Image - RK 919-RC4 1-4-1-2
RK 919-RC4 1/4-1/2

Check Rubber Parts Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
919 Product Image
RK 919-RT 1/4-1/2

Complete Rubber Parts Kit

</br></br>

2 Check Seat O-rings, 2 Check Cover O-rings, Relief Valve O-ring, Relief Valve Cover O-ring, Relief Valve Stem O-ring, Check Rubber, Relief Valve Diaphragm, Quad Ring, Relief Valve Disc</br>
0888135 Product Image
RK 919-RV 1/4-1/2

Relief Valve Rubber Parts Kit

</br></br>

Relief Valve Disc, RV Diaphragm, RV Seat O-ring, Cover O-ring</br>
Product Image - RK 919-S 1-4-1-2
RK 919-S 1/4-1/2

Seat Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
Product Image - RK 919-SV 1-4-1-2
RK 919-SV 1/4-1/2

Relief Valve Seat Kit

</br></br>

Relief Valve Seat, RV Seat O-ring, RV Cover O-ring</br>
Product Image - RK 919-T 1-4-1-2
RK 919-T 1/4-1/2

Total Repair Kit

</br></br>

Relief Valve Repair Kit, First Check Repair Kit, Second Check Repair Kit</br>
Product Image - RK 919-VT 1-4-1-2
RK 919-VT 1/4-1/2

Total Relief Valve Kit

</br></br>

Relief Valve Assembly, RV Spring, RV Cover O-ring</br>
0794148 Product Image
LFRK 919C 2

Cover Kit

</br></br>

Cover, Cover O-ring</br>
919 Product Image
RK 919-CK1 2

First Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
919 Product Image
RK 919-CK2 2

Second Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
Product Image - RK 919-RC4 2
RK 919-RC4 2

Check Rubber Parts Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
Product Image - RK 919-RT 2
RK 919-RT 2

Complete Rubber Parts Kit

</br></br>

2 Check Seat O-rings, 2 Check Cover O-rings, Relief Valve O-ring, Relief Valve Cover O-ring, Relief Valve Stem O-ring, Check Rubber, Relief Valve Diaphragm, Quad Ring, Relief Valve Disc</br>
Product Image - RK 919-S 2
RK 919-S 2

Seat Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
919 Product Image
RK 919-T 2

Total Repair Kit

</br></br>

Relief Valve Repair Kit, First Check Repair Kit, Second Check Repair Kit</br>
919 Product Image
RK 919-CK1 3/4

First Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
Product Image - RK 919-CK2 3-4
RK 919-CK2 3/4

Second Check Kit

</br></br>

Check Assembly, Spring, Cover O-ring</br>
Product Image - RT 919-RC4 3-4
RK 919-RC4 3/4

Check Rubber Parts Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
Product Image - RK 919-RT 3-4
RK 919-RT 3/4

Complete Rubber Parts Kit

</br></br>

2 Check Seat O-rings, 2 Check Cover O-rings, Relief Valve O-ring, Relief Valve Cover O-ring, Relief Valve Stem O-ring, Check Rubber, Relief Valve Diaphragm, Quad Ring, Relief Valve Disc</br>
Product Image - RK 919-S 3-4
RK 919-S 3/4

Seat Kit

</br></br>

Disc, Seat O-ring, Cover O-ring</br>
919 Product Image
RK 919-T 3/4

Total Repair Kit

</br></br>

Relief Valve Repair Kit, First Check Repair Kit, Second Check Repair Kit</br>
Kit Image - LF919-FS BMS retro Fit Kit
FP-RFK-BF-BMS-CFS-1/2-2

Activation Kit

</br></br>

2 Flood Sensors, Sensor Activation Module with Cable, Ground Wire, Power Adapter</br>
Kit Image - LF919-FS Cell retro Fit Kit
FP-RFK-BF-CFS-1/2-2

Activation Kit

</br></br>

2 Flood Sensors, Sensor Activation Module with Cable, Cellular Gateway with Mounting Kit, Ground Wire, Power Adapter</br>
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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.