Watts LFF113FP Wireless Smart Flood Protection Shut Down Valve

Product Overview

The Watts LFF113FP is a wireless smart flood protection shut down valve designed to be installed upstream of Reduced Pressure Zone (RPZ) Backflow Preventers. It automatically closes when continuous discharge from the RPZ Relief Valve is sensed, or by engaging the Solenoid By-Pass. The valve must be manually reset after the condition is resolved.

Key features include:

• Normally Open Valve: Closes upon sensing continuous discharge from the RPZ Relief Valve.
• Manual Reset: Requires manual intervention to reopen after closure.
• Position Indicator: Provides a local visual indication of the valve's closure status.
• Relay Box: Can be mounted remotely in the field.
• Building Management System (BMS) Connectivity: Can be connected to a BMS for integrated monitoring.
• Field Installed Components: Flood Sensor, SentryPlus Alert™ Control Box, and Cellular Gateway are installed in the field.
• Wireless Alerts: SentryPlus Alert™ technology wirelessly notifies users via text, call, or email in case of an abnormality.

Materials

Operation

The Watts Flood Protection Shutdown Valve system is designed to protect against property damage caused by Relief Valve discharge or a blocked/overwhelmed floor drain. Typical conditions leading to continuous relief valve discharge include:

• Fouled First Check Seat due to dirt, debris, or rocks.
• Failed First Check Spring.
• Clogged or blocked Relief Valve Sensing Line.
• Relief Valve Diaphragm failure.

The LFF113FP is a normally open valve installed upstream of an RPZ Backflow Prevention device. It closes when continuous relief valve discharge is sensed by the Flood Sensor, which energizes the Relay Box and Solenoid Pilot. The valve is equipped with a normally closed Solenoid By-Pass valve that manually closes the Main Valve when engaged. The remote Control Box features an adjustable time delay (0-120 seconds) to prevent closure due to intermittent or nuisance discharges. The Position Indicator provides visual confirmation of valve closure. The valve remains closed even if power is interrupted and requires manual reset after the RPZ issue is resolved.

System Components

The system includes:

• Main Valve (Single Chamber)
• Check Valve
• Adjustable Closing Speed
• 2-Way Solenoid
• Pressure Gauge
• Manual Reset Ball Valve
• Relay Box (valve mounted)
• Control Box (field installed)
• Cellular Gateway (field installed, up to 100ft from Control Box)
• Flood Sensor (field installed)
• Position Indicator
• Solenoid By-Pass
• Isolation Cocks
• Flow Clean Strainer

Specifications

The Flood Protection Shutdown Valve is a normally open, diaphragm-actuated, single-diaphragm valve. It closes automatically upon sensing continuous discharge from the RPZ relief valve. A time delay in the Control Box prevents closure on intermittent discharges. If continuous discharge occurs, the Flood Sensor signals the Control Box, which energizes the Relay Box and Solenoid to close the main valve. Manual reset is required after closure.

The Control Box connects to the Cellular Gateway for wireless communication (text, phone, email) via the Watts Syncta Cloud IoT platform. Remote Trip Indication terminals are available for BMS/PLC integration.

The Flood Sensor is installed horizontally in the RPZ Relief Valve discharge piping and must not be installed vertically. The Position Indicator is a stainless steel rod that visually indicates valve stem movement through a Pyrex sight tube.

The main valve body and cover are Ductile Iron (ASTM A536) with NSF 61 Certified Epoxy Coating. Internal components are Ductile Iron or CF8M (316) Stainless Steel. Throttling components (valve seat and disc guide) are Stainless Steel. The disc and diaphragm assembly uses a Buna-N synthetic rubber disc retained by a disc retainer and disc guide. The valve features an under-the-disc flow design and is guided by two bearings for proper alignment.

The Pilot Control System includes a Flo-Clean Strainer, NEMA 4, 120 VAC 60HZ 2-Way Solenoid with Manual Operator, Manual Reset Ball Valve, Pressure Gauge, Visual Position Indicator, Relay Box, Control Box, and Isolation Ball Valves.

The valve is available as Watts 113FP (globe) or 1113FP (angle) models.

Flow Data and Headloss

The following tables and charts provide flow data and headloss information for various valve sizes. Cv factors are provided to calculate flow (Q) and pressure drop (ΔP).

Flow Data Table

Notes:

• Maximum continuous flow is based on a velocity of 20 ft/sec.
• Maximum intermittent flow is based on a velocity of 25 ft/sec.
• Minimum flow rates are based on a 20-40 psi pressure drop.
• The Cv Factor is the flow rate in US GPM at 60°F that causes a 1 psi drop.
• Cv factors are based on a fully open valve.
• Sizing considerations include inlet pressure, outlet pressure, and flow rates. Consult Watts for cavitation analysis.

Headloss Chart

A chart illustrating headloss (Pressure Drop vs. Flow Rate) for Globe and Angle valve patterns is provided, showing curves for various valve sizes.

[Chart showing Pressure Drop in psi versus Flow Rate in Gallons per minute for Globe and Angle valve patterns across different valve sizes.]

Dimensions

Detailed dimensions for Globe and Angle valve patterns are provided in tables, including measurements for threaded and flanged connections, as well as grooved end dimensions. Valve travel information is also included.

Globe and Angle Dimensions

Grooved End Dimensions

Valve Travel

System Components Detailed

Control Box

The Control Box features an adjustable time delay (0-120 seconds) to prevent premature valve closure due to intermittent discharges. Time delay is adjusted via '+' or '-' buttons. It also includes terminals for connecting to a Building Management System or alarm.

[Image of the Watts Control Box with SentryPlus Alert technology, showing connection terminals and adjustment buttons.]

Cellular Gateway

The Watts Cellular Gateway connects to the Control Box and communicates wirelessly via the cellular network with the Watts Syncta® Cloud IoT platform. It alerts users of fault conditions, such as abnormal continuous discharge from the Relief Valve. The Gateway is remotely mounted, electrically powered via the Control Box, and can be located up to 100ft away.

[Image showing the Cellular Gateway connected to the Control Box and a smartphone displaying alerts.]

Flood Sensor

The Flood Sensor is installed in the discharge piping of the RPZ relief valve. When water is detected, it signals the Control Box to send wireless alerts and/or close the LFF113FP valve. It must be installed horizontally.

[Image of the Flood Sensor with a 2" NPT connection.]

Relay Box

The Relay Box contains the relay that operates the LFF113FP Solenoid to close the valve. It receives the signal from the Control Box and is wired directly to the Solenoid.

[Image of the Relay Box with wiring terminals.]

Universal Upgrade Kit

An upgrade kit is available to convert existing LFF113FP ACV and/or Backflow RPZ installations to Smart Connected assemblies without removing existing components. The kit includes the Control Box, Cellular Gateway, Flood Sensor, and a 2" Tee with NPTF connections for mounting the Flood Sensor (EDP 0113209). An additional Relay Box is available for LFF113FP ACV solenoids (EDP 0113210).

[Diagram showing the Universal Upgrade Kit components and their connections to a backflow preventer.]

Relief Valve Discharge Rates

The following charts display relief valve discharge rates for various Reduced Pressure Zone Assemblies (Series 009, 909, 919, 957, and 994). These curves represent catastrophic or worst-case discharge rates and were developed under specific test conditions.

1/4", 3/8", 1/2" 009QT

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 1/4", 3/8", 1/2" 009QT assemblies.]

3/4" 009M3QT

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 3/4" 009M3QT assemblies.]

1" 009M2QT

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 1" 009M2QT assemblies.]

1 1/4" 009M2QT

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 1 1/4" 009M2QT assemblies.]

1 1/2" 009M2QT

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 1 1/2" 009M2QT assemblies.]

2" 009M2QT

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 2" 009M2QT assemblies.]

2 1/2", 3" 009

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 2 1/2" and 3" 009 assemblies.]

3/4", 1" 909

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 3/4" and 1" 909 assemblies.]

1 1/4", 1 1/2", 2" 909

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 1 1/4", 1 1/2", and 2" 909 assemblies.]

2 1/2" - 3" 909

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 2 1/2" - 3" 909 assemblies.]

4", 6", 8", 10" 909

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 4", 6", 8", 10" 909 assemblies.]

1" 919 RV

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 1" 919 RV assemblies.]

2" 919 QT

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 2" 919 QT assemblies.]

2 1/2" – 10" 994

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 2 1/2" – 10" 994 assemblies.]

2 1/2" – 10" 957

[Line graph showing Rate of Flow (lpm/gpm) versus Pressure (psi/bar) for 2 1/2" – 10" 957 assemblies.]

Typical Flow Rates by Drain Size