LF860 Large
Lead Free* MasterSeries In-Line Reduced Pressure Zone Assembly Backflow Preventers with Flood Sensor - Large Diameter
LF860 Large
Lead Free* MasterSeries In-Line Reduced Pressure Zone Assembly Backflow Preventers with Flood Sensor - Large Diameter
Features
- Sensor on the relief valve for flood detection
- Flood alert feature activated with add-on connection kit, compatible with BMS and cellular communication
- ArmorTek coating technology to resist corrosion of internals
- Combines the use of a stainless-steel relief valve seat and stainless-steel check components for maximum performance and durability
- Requires no special tools for inline service
- Is highly suitable for potable drinking water systems where code mandates protection from backpressure and backsiphonage conditions
- Protects potable water against cross-connection contamination of high hazard (toxic) fluids in water services
- Sizes 2 1/2 to 10 Inch
- Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity
MasterSeries LF860 Large 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
The valve’s internals are protected by ArmorTek®, a multilayer corrosion‑resistant coating engineered to extend service life in demanding environments.
To learn more visit: https://www.watts.com/armortek
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
Video - Connected Backflow Flood Detection
Learn how Watts flood sensors integrated with backflow prevention assemblies provide real-time alerts for excessive relief valve discharge, helping prevent water damage and facility downtime.
Runtime : 00:01:10Watch Now
Video - ArmorTek Advanced Coating System Overview
Armortek’s patented triple-layer coating protects valves from corrosion and microbiologically induced damage, extending their lifespan and enabling repair and recycling for sustainable water management.
Runtime : 00:01:13Watch Now
Video - ArmorTek in Las Vegas Five Years After Install
See how Armortek’s advanced coating system has successfully protected valves from corrosion and microbiological damage over five years in a real-world Las Vegas installation.
Runtime : 00:01:44Watch Now
Video - How to Activate Your Flood Detection System
Learn how to quickly register, activate, and test your SentryPlus Flood Sensor Upgrade Kit using the Syncta platform for seamless automated flood protection and customizable alerts.
Runtime : 00:02:18Watch Now
Select a Model
Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF860 Large
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| Model | Used On - Series or Model | Kit Contents |
|---|---|---|
|
8X6/8X6V-SM 21/2-3
Check Spring Kit |
</br>856ST, 876VST, LF860, LF886V</br> |
</br> |
|
FRK 850/860-C-T 2 1/2-3
Cover Kit |
</br>850, 860</br> |
Epoxy Coated Cover, Expansion Pin, O-ring, Bearing Socket</br> |
|
FRK 860/880V-VT 2 1/2-10 INT ASSY
Relief Valve Internal Module Kit |
</br>8860, 880V</br> |
Module Assembly, Outer Diaphragm</br> |
|
FRK 860/880V-VT 2 1/2-10 TOTAL
Relief Valve Kit |
</br>860, 880V</br> |
Seat Ring, 2 O-rings, Outer/Inner Diaphragm, Sensing Line Gasket, Retainer, Main Guide, Flow Screw, Slip Ring, Seat Disc, Aux Guide, Flow Washer, Stem and Spring</br> |
|
FRK 860-RT 2 1/2-3
Complete Rubber Parts Kit |
</br>860</br> |
6 O-rings, 2 Jam Nuts, 2 Washers, Outer/ Inner Diaphragm, RV Seat Disc, 2 Check Discs, 2 Seat Ring Gaskets, Sensing Line Gasket, 4 Bulk Head Gaskets, 2 Bearing Sockets, RV Extension</br> |
|
FRK 860-VT
Relief Valve Kit |
</br>860</br> |
Main Assembly with Internals, Seat Ring, Elbow, 3 O-rings, Sensing Line Gasket, Extension, 8 Bolts, 8 Nuts, 4 Washers</br> |
|
FRK 870/876V-RT 2 1/2-3
Complete Rubber Parts Kit |
</br>870, 876V</br> |
2 Seat Discs, 2 Seat Gaskets, 2 Cover O-rings, 2 Cover Bushings, Cover Plate Gasket and O-ring, 4 Bulk Head Gaskets</br> |
|
FRK 880V
Relief Valve Rubber Parts Kit |
</br>8860, 880V</br> |
2 O-rings, Outer/Inner Diaphragm, Seat Disc, Sensing Line Gasket</br> |
|
LFFRK 85X/87X-RT 2 1/2-3
Complete Rubber Parts Kit |
</br>856ST, 876VST, LF860, LF886V</br> |
</br> |
|
LFFRK 850/870-CK4 856/876 CK1 860/880 CK2 2 1/2-3
Check Replacement Kit-Inlet |
</br>850, 870</br> |
</br> |
|
LFFRK 850-880-SM2 DCDA 2 1/2-3
Check Spring Kit |
</br>850, 880</br> |
</br> |
|
LFFRK 850-886V-D 2 1/2-3
Disc Kit |
</br>850, 856ST, 886V</br> |
</br> |
|
LFFRK 850-886V-S 2 1/2-3
Seat Ring/Arm Kit |
</br>856ST, 876VST, LF860, LF886</br> |
</br> |
|
LFFRK 860/880-CK1 2 1/2-3
First Check Kit |
</br>LF860, LF880</br> |
</br> |
|
LFFRK 860-80V-RVS
Relief Valve Seat Kit |
</br>LF860, LF866, LF880V, LF886V</br> |
Relief Valve Seat, O-ring</br> |
|
LFFRK 860-80V-RVS 2 1/2-10
Relief Valve Seat Kit |
</br>LF860, LF866, LF880V, LF886V</br> |
Relief Valve Seat, Relief Valve Seat O-ring</br> |
|
LFFRK 860-80V-SM1 21/2-3
Check Spring Kit |
</br>LF860, LF880</br> |
</br> |
|
LFFRK 860-80V-VT 2 1/2-10
Total Relief Valve Kit |
</br>LF860, LF866, LF880V, LF886V</br> |
</br> |
|
LFFRK 860-80V-VT 2 1/2-10 RV
Relief Valve Internal Module Kit |
</br>LF860, LF866, LF880V, LF886V</br> |
</br> |
|
LFFRK 86X/88X-RT 2 1/2-3
Complete Rubber Parts Kit |
</br>LF860, LF866</br> |
</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> |
|
FRK 850/860-C-T 4
Cover Kit |
</br>850, 856, 860, 870, 880</br> |
Cover, Expansion Pin, Socket Bearing, O-ring</br> |
|
LFFRK 85X/87X-RT 4
Complete Rubber Parts Kit |
</br>856ST, 876VST, LF860, LF886V</br> |
</br> |
|
LFFRK 850/870-CK4 856/876 CK1 860/880 CK2 4
Check Replacement Kit-Inlet |
</br>850, 870</br> |
</br> |
|
LFFRK 850-880-SM2 DCDA 4
Check Spring Kit |
</br>850, 880</br> |
</br> |
|
LFFRK 850-886V-D 4
Disc Kit |
</br>850, 856ST, 886V</br> |
</br> |
|
LFFRK 850-886V-S 4
Seat Ring/Arm Kit |
</br>856ST, 876VST, LF860, LF886</br> |
</br> |
|
LFFRK 860/880-CK1 4
First Check Kit |
</br>LF860, LF880</br> |
</br> |
|
LFFRK 860-80V-RV 2 1/2-10
Relief Valve Rubber Parts Kit |
</br>LF860, LF880V</br> |
</br> |
|
LFFRK 860-80V-SM1 RP/RPDA 4
Check Spring Kit |
</br>LF860, LF880</br> |
</br> |
|
LFFRK 86X/88X-RT 4
Complete Rubber Parts Kit |
</br>LF860, LF866</br> |
O-rings, Gaskets, Diaphragms, Seat Disc, Screws, Washers</br> |
|
FP-FBF-BMS 2 1/2-10
Activation Kit |
</br>LF860 Large, LF866, LF880V, LF886V</br> |
Sensor Activation Module with Cable, Ground Wire, Power Adapter</br> |
|
FP-FBF-CFS 2 1/2-10
Activation Kit |
</br>LF860 Large, LF866, LF880V, LF886V</br> |
Sensor Activation Module with Cable, Cellular Gateway with Mounting Kit, Ground Wire, Power Adapter</br> |
|
FP-FBF-SA-FMS-2 1/2-10
Upgrade/Repair Kit |
</br>860 Large, 866, 880V</br> |
Flood Sensors, Nuts, Bolts</br> |
|
FRK 860/880-RT 8-10
Complete Rubber Parts Kit |
</br>860, 880</br> |
2 Seat Discs, 2 Seat Gaskets, 2 Cover O-rings, 2 Cover Bushings, Cover Plate Gasket and O-ring, 4 Bulk Head Gaskets, Relief Valve Rubber Components</br> |
|
FRK850-56/870-76-RT 8-10
Complete Rubber Parts Kit |
</br>850, 856</br> |
2 Seat Discs, 2 Seat Gaskets, 2 Cover O-rings, 2 Cover Bushings, Cover Plate Gasket and O-ring, 4 Bulk Head Gaskets</br> |
|
LFFRK 85X/87X-RT 8-10
Complete Rubber Parts Kit |
</br>856ST, 876VST, LF860, LF886V</br> |
</br> |
|
LFFRK 850-866V-D 8-10 870-886 8
Disc Kit |
</br>850, 856ST, 886V</br> |
</br> |
|
LFFRK 850-880-SM2 DCDA 8-10
Check Spring Kit |
</br>850, 880</br> |
</br> |
|
LFFRK 850-886V-S 8-10
Seat Ring/Arm Kit |
</br>856ST, 876VST, LF860, LF886</br> |
</br> |
|
LFFRK 850-CK4 8-10 870 CK4 8
Check Kit |
</br>856ST, 876VST, LF860, LF880V</br> |
</br> |
|
LFFRK 860/880V-RT 8-10
Complete Rubber Parts Kit |
</br>LF860, LF880V</br> |
</br> |
|
LFFRK 860-80V-SM1 RP/RPDA 8-10
Check Spring Kit |
</br>LF860, LF880</br> |
</br> |
|
LFFRK 860-CK1 8-10 880 CK1 8
First Check Kit |
</br>860</br> |
</br> |
|
LFFRK 880X-VT ALL/86X 10
Relief Valve Kit |
</br>LF880V, LF886V, LF860, LF866 </br> |
</br> |
|
FRK 850/856/870/876-RT 6
Complete Rubber Parts Kit |
</br>850, 856, 870, 876</br> |
2 Seat Discs, 2 Seat Gaskets, 2 Cover O-rings, 2 Cover Bushings, Cover Plate Gasket and O-ring, 4 Bulk Head Gaskets</br> |
|
FRK 850/856/870V/876V-D 6
Disc Kit |
</br>850, 856, 807V, 876V</br> |
Seat Disc Assembly, Cover O-ring, Nut, Washer, Lube</br> |
|
FRK 850/860-C-T 6
Cover Kit |
</br>850, 860</br> |
Cover, Expansion Pin, Socket Bearing, O-ring</br> |
|
FRK 860-RT 6
Complete Rubber Parts Kit |
</br>860</br> |
6 O-rings, 2 Jam Nuts, 2 Washers, Outer/ Inner Diaphragm, RV Seat Disc, 2 Check Discs, 2 Seat Ring Gaskets, Sensing Line Gasket, 4 Bulk Head Gaskets, 2 Bearing Sockets, RV Extension</br> |
|
FRK 880/880V-D 6
Disc Kit |
</br>880, 880V</br> |
Seat Disc Assembly, Cover O-ring, Nut, Washer, Lube</br> |
|
LFFRK 85X/87X-RT 6
Complete Rubber Parts Kit |
</br>856ST, 876VST, LF860, LF886V</br> |
</br> |
|
LFFRK 850-880-SM2 DCDA 6
Check Spring Kit |
</br>850, 880</br> |
</br> |
|
LFFRK 850-886V-D 6
Disc Kit |
</br>850, 856ST, 886V</br> |
</br> |
|
LFFRK 850-886V-S 6
Seat Ring/Arm Kit |
</br>856ST, 876VST, LF860, LF886</br> |
</br> |
|
LFFRK 860-VT 2 1/2-8
Relief Valve Kit |
</br>860</br> |
</br> |
|
FRK 850/856/870V/876V-D 8-10
Disc Kit |
</br>850, 856, 807V, 876V</br> |
10 IN Seat Disc Assembly, Cover O-ring, Nut, Washer, Lube</br> |