Jump to Section

LF866

Lead Free* MasterSeries In-Line Reduced Pressure Zone Detector Assembly Backflow Preventers (Type-II) with Flood Sensor - Large Diameter

Lead Free MasterSeries In-Line Reduced Pressure Zone Detector Assembly Backflow Preventer, OSY Gates, Meter and Flood Sensor
Product Image - LF866 -OSY-GPM (Angle)
Lead Free MasterSeries In-Line Reduced Pressure Zone Detector Assembly Backflow Preventer, Less Shutoff Valve, Meter and Flood Sensor
Adding activation kit to flood sensor
×

LF866

Lead Free* MasterSeries In-Line Reduced Pressure Zone Detector Assembly Backflow Preventers (Type-II) with Flood Sensor - Large Diameter

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 Wi-Fi connectivity
  • Utilizes advanced ArmorTek coating technology to build in electrochemical corrosion inhibitor and microbial inhibitor to resist corrosion of internal parts
  • 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
View More

“nexaplatform

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.
Learn more about Nexa

Jump to Section

MasterSeries LF866 Lead Free* reduced pressure detector 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 help stop the reverse flow of fire protection system substances being pumped or siphoned into the potable water supply. A meter incorporated to detect ground leaks and unauthorized illegal taps greatly reduces annual water expenses. Check with local water authorities for installation requirements.

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

The ductile iron body is fused with ArmorTek®, 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

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 - MasterSeries LF866 Maintenance and Repair

Runtime : Watch 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 - MasterSeries Revief Valve Maintenance and Repair

Runtime : Watch Now

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

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific LF866

Model
Description
Load More

Model Used On - Series or Model Kit Contents
BMS Sensor Connection Kit, For Series LF860-FS Large, LF866-FS, LF880V-FS, LF886V-FS, Sizes 2 1/2 to 10 IN
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>
Cellular Sensor Connection Kit, For Series LF860-FS Large, LF866-FS, LF880V-FS, LF886V-FS, Sizes 2 1/2 to 10 IN
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>
Product Image - Stand alone flood Sensors for 860, 866, 880
FP-FBF-SA-FMS-2 1/2-10

Upgrade/Repair Kit

</br>860 Large, 866, 880V</br>

Flood Sensors, Nuts, Bolts</br>
Product Image - LFFRK 850-860V-D 8-100
LFFRK 850-866V-D 8-10 870-886 8

Disc Kit

</br>850, 856ST, 886V</br>

</br>
Product Image - LFFRK 860-80V-RVS21-2-10
LFFRK 860-80V-RVS

Relief Valve Seat Kit

</br>LF860, LF866, LF880V, LF886V</br>

Relief Valve Seat, O-ring</br>
Product Image - LFFRK 860-80V-RVS21-2-10
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>
Product Image - RK-LF860/LF880V
LFFRK 860-80V-VT 2 1/2-10

Total Relief Valve Kit

</br>LF860, LF866, LF880V, LF886V</br>

</br>
Product Image - LFFRK 860-80V-VT 21/2-10
LFFRK 860-80V-VT 2 1/2-10 RV

Relief Valve Internal Module Kit

</br>LF860, LF866, LF880V, LF886V</br>

</br>
SCM_BF_1000000788_nexa badge
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>
Product Image - RK-850/856/860/856/870V/876V/LF850/LF886V/860
LFFRK 850-886V-D 2 1/2-3

Disc Kit

</br>850, 856ST, 886V</br>

</br>
Product Image - RK-LF850-LF886V
LFFRK 850-886V-D 4

Disc Kit

</br>850, 856ST, 886V</br>

</br>
Product Image - RK-850/856/860/856/870V/876V/LF850/LF886V/860
LFFRK 850-886V-D 6

Disc Kit

</br>850, 856ST, 886V</br>

</br>
Product Image - RK-LF8X6/8X6V
8X6/8X6V-SM 21/2-3

Check Spring Kit

</br>856ST, 876VST, LF860, LF886V</br>

</br>
Product Image - RK-LF8X6
8X6-CK2 21/2-3

Check Kit

</br>856ST, 876VST, LF860, LF886V</br>

</br>
850/860 Product Image
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>
Product Image - RK-850/856/870v/876/LF850/LF870V
LFFRK 85X/87X-RT 2 1/2-3

Complete Rubber Parts Kit

</br>856ST, 876VST, LF860, LF886V</br>

</br>
Product Image - RK-850/870V;RK-LF850-LF886V
LFFRK 850-886V-S 2 1/2-3

Seat Ring/Arm Kit

</br>856ST, 876VST, LF860, LF886</br>

</br>
Product Image - LFFRK 856/66 BPG 21/2-4
LFFRK 856/66 BPG 21/2-4

</br>LF856, LF866</br>

</br>
Product Image - RK-LF860/LF880
LFFRK 860/880-CK1 2 1/2-3

First Check Kit

</br>LF860, LF880</br>

</br>
Product Image - RK-LF860/LF880V
LFFRK 860-80V-RV 2 1/2-10

Relief Valve Rubber Parts Kit

</br>LF860, LF880V</br>

</br>
Product Image - LFFRK 860-80V-SM1 21-2-3
LFFRK 860-80V-SM1 21/2-3

Check Spring Kit

</br>LF860, LF880</br>

</br>
Product Image - LFFRK 860-VT 2 1/2-8
LFFRK 860-VT 2 1/2-8

Relief Valve Kit

</br>860</br>

</br>
Product Image - RK-LF860/LF880V
LFFRK 86X/88X-RT 2 1/2-3

Complete Rubber Parts Kit

</br>LF860, LF866</br>

</br>
Product Image - LFFRK BP HOSE 6-10
LFFRK BP HOSE 2 1/2 - 4

</br>LF856, LF866, LF876, LF886V</br>

</br>
Product Image - RK-LF856/66/76/86
856/66/76/86-SM 4

Check Spring Kit

</br>LF856, LF866, LF876, LF886</br>

</br>
Product Image - RK-LF8X6/8X6V
8X6/8X6V-CK2 4

Second Check Kit

</br>856ST, 876VST, LF860, LF886V</br>

Second Check</br>
850/860,71AH-N Product Image
FRK 850/860-C-T 4

Cover Kit

</br>850, 856, 860, 870, 880</br>

Cover, Expansion Pin, Socket Bearing, O-ring</br>
Product Image - RK-850/856/870v/876/LF850/LF870V
LFFRK 85X/87X-RT 4

Complete Rubber Parts Kit

</br>856ST, 876VST, LF860, LF886V</br>

</br>
Product Image - LFFARK 619 ASSEMBLY
LFFRK 619 ASSEMBLY

</br>856, 866, 876V, 886V</br>

</br>
Product Image - LFFRK 619 CK1
LFFRK 619 CK1

</br>856, 866, 876V, 886V</br>

</br>
Product Image - RK-850/870V;RK-LF850-LF886V
LFFRK 850-886V-S 4

Seat Ring/Arm Kit

</br>856ST, 876VST, LF860, LF886</br>

</br>
Product Image - RK-LF860/LF880
LFFRK 860/880-CK1 4

First Check Kit

</br>LF860, LF880</br>

</br>
Product Image - RK-LF860/LF880V
LFFRK 860-80V-SM1 RP/RPDA 4

Check Spring Kit

</br>LF860, LF880</br>

</br>
Product Image - LFFRK 86X-88X-RT 4
LFFRK 86X/88X-RT 4

Complete Rubber Parts Kit

</br>LF860, LF866</br>

O-rings, Gaskets, Diaphragms, Seat Disc, Screws, Washers</br>
Product Image - RK-LF856/66/76/86
856/66/76/86-SM 6

Check Spring Kit

</br>LF856, LF866, LF876, LF886</br>

</br>
Product Image - RK-LF8X6/8X6
8X6/8X6-CK2 6

Second Check Kit

</br>856ST, 876VST, LF860, LF886V</br>

Second Check</br>
850/860,71AH-N Product Image
FRK 850/860-C-T 6

Cover Kit

</br>850, 860</br>

Cover, Expansion Pin, Socket Bearing, O-ring</br>
Product Image - RK-850/856/870v/876/LF850/LF870V
LFFRK 85X/87X-RT 6

Complete Rubber Parts Kit

</br>856ST, 876VST, LF860, LF886V</br>

</br>
Product Image - RK-850/870V;RK-LF850-LF886V
LFFRK 850-886V-S 6

Seat Ring/Arm Kit

</br>856ST, 876VST, LF860, LF886</br>

</br>
Product Image - RK-LF860/LF880
LFFRK 860/880-CK1 6

First Check Kit

</br>LF860, LF880</br>

</br>
Product Image - LFFRK 860-80V-SM1 6
LFFRK 860-80V-SM1 6

Check Spring Kit

</br>LF860, LF880</br>

</br>
Product Image - LFFRK 86X-88X-RT 6
LFFRK 86X/88X-RT 6

Complete Rubber Parts Kit

</br>LF860, LF866</br>

</br>
Product Image - LFFRK 876/86 BPG 6
LFFRK 876/86 BPG 6

</br>LF876V, LF886V</br>

</br>
Product Image - LFFRK BP HOSE 6-10
LFFRK BP HOSE 6 - 10

</br>LF856, LF866, LF876, LF886V</br>

</br>
Product Image - RK-LF856/66/76/86
856/66/76/86-SM 8

Check Spring Kit

</br>LF856, LF866, LF876, LF886</br>

</br>
Product Image - RK-LF8X6/8X6
8X6-CK2 8-10

Second Check Kit

</br>856ST, 876VST, LF860, LF886V</br>

Second Check</br>
Product Image - RK-850/856/870v/876/LF850/LF870V
LFFRK 85X/87X-RT 8-10

Complete Rubber Parts Kit

</br>856ST, 876VST, LF860, LF886V</br>

</br>
Product Image - RK-850/870V;RK-LF850-LF886V
LFFRK 850-886V-S 8-10

Seat Ring/Arm Kit

</br>856ST, 876VST, LF860, LF886</br>

</br>
Product Image - LFFRK 856/66 BPG 6-10
LFFRK 856/66 BPG 6-10

</br>LF856, LF866</br>

</br>
Product Image - RK-LF860/LF880
LFFRK 860/880V-RT 8-10

Complete Rubber Parts Kit

</br>LF860, LF880V</br>

</br>
Product Image - LFFRK 860-80V-SM1 8-10
LFFRK 860-80V-SM1 RP/RPDA 8-10

Check Spring Kit

</br>LF860, LF880</br>

</br>
Product Image - RK-LF860/LF880
LFFRK 860-CK1 8-10 880 CK1 8

First Check Kit

</br>860</br>

</br>
Product Image - LFFRK 876-86 BPG 8
LFFRK 876/86 BPG 8

</br>LF876V, LF886V</br>

</br>
Customer Support
Find a Sales Representative

Share this Product

 
View Warranty Download MasterSpec Access BIM Drawings