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RP/IS-LF909S-FS   2250 

0834272 

© 2022 Watts

Limited Warranty:

 Watts (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment.  

In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.  

THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT.  THE COMPANY MAKES NO OTHER 

WARRANTIES, EXPRESS OR IMPLIED.  THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED 

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, 

special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs 

resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company 

has no control.  This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.  

Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages.  Therefore the above 

limitations may not apply to you.  This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State.  You should consult applicable state laws to 

determine your rights.  

SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF 

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

Add-on and Retrofit Sensor Connection Kits for Building Management Systems

ORDERING CODE

ADD-ON/RETROFIT KIT

DESCRIPTION

88003056

FP-BF-BMS-1/2-2 
BMS Sensor Connection Kit 
Series LF909-FS Small 
Sizes ¾" to 2"

Includes sensor activation module with cable, ground wire, and power adapter. Use this kit to 
activate the integrated flood sensor and enable flood detection capabilities on the relief valve 
of a new installation working with a BMS controller (not included).

88003058

FP-RFK-BF-BMS-CFS-1-11/2 
BMS Sensor Retrofit Connection Kit 
Series LF909 Small 
Sizes ¾" to 1"

Includes flood sensor, sensor activation module with cable, mounting bolts, ground wire, and 
power adapter. Use this kit to install the flood sensor and enable flood detection capabilities 
on the relief valve of an existing installation working with a BMS controller (not included).

88003059

FP-RFK-BF-BMS-CFS-2 
BMS Sensor Retrofit Connection Kit 
Series LF909 Small 
Sizes 1¼" to 2"

Includes flood sensor, sensor activation module with cable, mounting bolts, ground wire, and 
power adapter. Use this kit to install the flood sensor and enable flood detection capabilities 
on the relief valve of an existing installation working with a BMS controller (not included).

Add-on and Retrofit Sensor Connection Kits for Cellular Communication

ORDERING CODE

ADD-ON/RETROFIT KIT

DESCRIPTION

88003060

FP-BF-CFS-1/2-2 
Cellular Sensor Connection Kit 
Series LF909-FS Small 
Sizes ¾" to 2"

Includes sensor activation module with cable, Cellular Gateway with mounting kit, ground 
wire, and power adapter. Use this kit to activate the integrated flood sensor and enable flood 
detection capabilities on the relief valve of a new installation working with cellular communication 
to send alerts by email message, SMS text message, or voice call.

88003062

FP-RFK-BF-CFS-1-11/2 
Cellular Sensor Retrofit Connection Kit 
Series LF909 Small 
Sizes ¾" to 1"

Includes flood sensor, sensor activation module with cable, Cellular Gateway with mounting 
kit, mounting bolts, ground wire, and power adapter. Use this kit to install the flood sensor and 
enable flood detection capabilities on the relief valve of an existing installation working with cel-
lular communication to send alerts by email message, SMS text message, or voice call.

88003063

FP-RFK-BF-CFS-2 
Cellular Sensor Retrofit Connection Kit 
Series LF909 Small 
Sizes 1¼" to 2"

Includes flood sensor, sensor activation module with cable, Cellular Gateway with mounting 
kit, mounting bolts, ground wire, and power adapter. Use this kit to install the flood sensor and 
enable flood detection capabilities on the relief valve of an existing installation working with 
cellular communication to send alerts by email message, SMS text message, or voice call.

USA:

  T: (978) 689-6066 • Watts.com

Canada:  

T: (888) 208-8927 • Watts.ca

Latin America:  

T: (52) 55-4122-0138 • Watts.com

Summary of Contents for LF909-FS

Page 1: ...ion A retrofit sensor connection kit is available for existing installations See Add on and Retrofit Sensor Connection Kits on the last page How It Operates The unique relief valve construction incorporates two channels one for air the other for water When the relief valve opens the right channel admits air to the top of the reduced pressure zone relieving the zone vacuum The left channel then dra...

Page 2: ... or other equipment with periodic flow requirements discharge from the relief vent may occur due to water supply pressure fluctuation during static no flow conditions See Troubleshooting before installation Observe the direction of the flow arrows on the valve assembly The backflow preventer is designed so that the critical level of the relief valve is positioned below the first check This unique ...

Page 3: ...ng A discharge line should be piped from the air gap at the relief valve connection making sure there is adequate drainage Never pipe the discharge line directly into a drainage ditch sewer or sump The assembly should never be installed where any part of the unit could become submerged in standing water Consideration should be given to the installation of external support structure as applicable I...

Page 4: ...se needle valve A high red and open test cock No 2 2 Close test cock No 4 Disconnect the bypass hose yellow at test cock No 4 3 Open needle valves B low blue and C bypass yellow bleeding to atmosphere Then close needle valve B blue to restore the system to a normal static condition 4 Observe the pressure differential gauge If there is a decrease in the indicated value the No 1 check valve is repor...

Page 5: ...is attached with a bayonet type locking arrangement 3 Holding the check valve module in both hands rotate the assembly quarter turn This disengages the disc assembly spring and seat cover into individual components 4 Clean and reassemble the disc assembly or depending upon its condition discard and replace it with a new assembly from the service kit O rings should be cleaned or replaced as necessa...

Page 6: ...ver handy to reassemble the relief valve assembly Figure 2 Depress the assembly carefully guiding it against the 2 pound spring load When properly aligned the piston is in the cylinder bore Insert the screwdriver along the right channel wall positioning the screwdriver tip to the left of the relief valve O rings to hold the assembly in place Figure 3 Let go of the screwdriver and use both hands to...

Page 7: ...ound the piping system and or electrically isolate the device with plastic pipe immediately upstream and down stream of the device Valve improperly reassembled If valve is dis as sem bled during installation exercise caution when reinstalling check springs in their proper location Valve exhibits high pressure drop Fouled strainer Clean strainer element or replace Valve too small for flows encounte...

Page 8: ...ivation module with cable ground wire and power adapter Use this kit to activate the integrated flood sensor and enable flood detection capabilities on the relief valve of a new installation working with a BMS controller not included 88003058 FP RFK BF BMS CFS 1 11 2 BMS Sensor Retrofit Connection Kit Series LF909 Small Sizes to 1 Includes flood sensor sensor activation module with cable mounting ...

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