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679-LC-35 Rev — 05/2017

AUTOMATIC FIRE SUPPRESSION FOR GREASE FIRES 

ON INDOOR RESIDENTIAL STOVE TOPS 

(CLASS K)

USER MANUAL

• Keep away from children.
• Avoid exposure to suppressing powder 

if you wear contacts, or have a 
respiratory illness or skin allergies.

• Contents may be harmful if swallowed.
• Suppressing powder is non-toxic but 

could cause skin irritation. In case 
of contact with powder, flush from 
affected area with water.

• If irritation persists, contact a physician 

immediately.

• Discard product after activation.
• Discard product if dropped or 

damaged.

• Do not clean unit.

© 2017 WilliamsRDM, Inc. All rights reserved. StoveTop FireStop, the StoveTop FireStop logo, STFS Plus LC, the STFS Plus LC logo, and design graphics are either 
registered trademarks or trademarks of WilliamsRDM, Inc. in the United States, and/or other countries. Model No. 679-LC-3A. Patent info at www.STFS.com/patents.

Designed & Manufactured 

by WilliamsRDM in Texas

Designed solely for suppressing  

stove top grease fires in  

indoor residential kitchens using no more 

than 1/2” of oil before food is added.

Contents: 

Potassium Bicarbonate

For storage and disposal information, 

or to learn more about StoveTop FireStop,  

please visit our website at www.STFS.com,  

or call 1-888-616-7976.

WilliamsRDM, Inc. (“WRDM”) warrants this StoveTop FireStop® 
product against defects in material or workmanship for the time 
periods and under the terms set forth below. Pursuant to this 
Limited Warranty, WRDM will, at its option, (i) repair the product 
using new or refurbished parts or (ii) replace the product with a 
new or refurbished product. For purposes of this Limited Warranty, 
“refurbished” means a product or part that has been returned to its 
original specifications. 

In the event of a defect, these are your 

exclusive remedies.   

WRDM warrants to the original retail purchaser all WRDM products 
for a period of one (1) year against defective material and faulty 
workmanship. Any unit found to be defective during the warranty 
period will be repaired if possible, or replaced free of charge upon 
the buyer’s prepaid return of the defective unit—only after receipt 
of an official Return Material Authorization (RMA) number. Proof of 
retail purchase is required.  This warranty gives the buyer specific 
legal rights which may vary by state (or country.)

THE FORGOING WARRANTY IS MADE IN LIEU OF ALL OTHER 
WARRANTIES WITH RESPECT TO THIS PRODUCT, INCLUDING 

ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS 
FOR A PARTICULAR PURPOSE—WHICH ARE HEREBY 
DISCLAIMED. 

THERE ARE NO IMPLIED WARRANTIES WHICH 

EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF. 

 NO 

PERSON IS AUTHORIZED TO GIVE ANY OTHER WARRANTY, OR 
TO ASSUME FOR WRDM ANY OTHER LIABILITY IN CONNECTION 
WITH THE SALE OR INSTALLATION OF ITS PRODUCTS. 
REPLACEMENT OF THE PRODUCT WILL BE THE SOLE REMEDY 
WITH RESPECT TO ANY LOSS OR DAMAGE TO PROPERTY.  
BUYER IS NOT RELYING ON SELLER’S JUDGMENT REGARDING 
BUYER’S PARTICULAR REQUIREMENTS AND BUYER HAS HAD 
AN OPPORTUNITY TO INSPECT THE PRODUCT TO BUYER’S 
SATISFACTION. UNAUTHORIZED SERVICE OF ANY KIND 
INVALIDATES ALL WARRANTY PROVISIONS.

This Limited Warranty covers only the hardware components 
packaged with this product.  It does not cover technical assistance 
for hardware.  Any parts or product replaced under this Limited 
Warranty will become the property of WRDM.  

LIMITATION ON DAMAGES: WRDM SHALL NOT BE LIABLE FOR 

ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING 
BUT NOT LIMITED TO ANY SUCH DAMAGES FOR ANY BREACH 
OF ANY EXPRESS OR IMPLIED WARRANTY ON THIS PRODUCT.

Instructions: To obtain warranty service, you must deliver the 
product, freight prepaid, in either its original packaging, or 
packaging affording an equal degree of protection, to WRDM’s 
specified manufacturing facility.  
This Limited Warranty only covers product issues caused by defects 
in material or workmanship during ordinary consumer use; it does 
not cover product issues caused by any other reason, including but 
not limited to product issues due to commercial use, acts of God, 
misuse, limitations of technology, or modification of or to any part 
of the WRDM product. This Limited Warranty is invalid if either the 
factory-applied work order number or date code has been altered 
or removed from the product. This Limited Warranty is valid only in 
the United States. 

For StoveTop FireStop customer service: 
go to www.STFS.com or call 1-888-616-7976. 

LIMITED WARRANTY

Read this user manual carefully prior to installation

• Not intended for cooking with more 

than 1/2” oil depth before food is 
added.

• Not recommended for gas stoves; 

powder may extinguish burner flame 
on a gas stove top

• If safe, turn burner OFF immediately 

after activation.

• Reignition is possible. 
• When suppressing powder comes in 

contact with fire, it may briefly flare 
and/or cause grease to splash. This is 
a normal and temporary reaction.

• This product may not suppress all 

stove top fires.

•  Failure to remove or replace by the 

“remove or replace before” date, as shown 

on the product label, could diminish the 

effectiveness of the product.

•  This product activates automatically by direct, 

sustained contact with a flame.

•  At the time of activation, a loud “POP” will occur. 

This is normal and meant to alert occupants,  

if present.

•  Unattended cooking is the leading cause of 

fires in the kitchen. Many injuries occur when 
occupants attempt to fight the fire themselves. 

•  Never leave anything cooking on the stove top 

unattended! If you have to leave the kitchen 
—even for a short time— turn off the stove.

•  Never leave home, or fall asleep while you are 

cooking.

•  Never pick up a flaming pan. You may be 

burned, or if the pan is dropped, flames may 
quickly spread to other more flammable areas.

•  Never use water to fight a grease fire! A violent 

explosion may result. Wet dishcloths or towels 
are also dangerous.

•  Always follow National Fire Protection 

Association (NFPA) guidelines for proper 
cooking safety. Visit www.nfpa.org.

The Next Evolution in StoveTop FireStop

®

www.STFS.com

IN THE BOX

ONE ASSEMBLED PAIR 

FOR EACH 4-BURNERS

Canister, x2

[A]

Mounting bar, x2

[B]

Magnets

[C]

Decal, 1 per pair

[D]

Side View

Bottom View

Top View

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