FUEL TANK ACCESSORIES LLC 503.496.3911
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Anti-Siphons (Fuel Fill Neck Application)

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PDF Printouts below.
April 2020 np anti siphon identification descriptions.pdf
File Size: 1966 kb
File Type: pdf
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Anti-Siphon Installation Instructions
File Size: 43 kb
File Type: pdf
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Peterbilt Anti-Siphon Installation Instructions
File Size: 492 kb
File Type: pdf
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Easy to install and Extremely Secure.
· Installs in seconds
· No tools needed
· Lifetime warranty
· Does not restrict fueling
· Use your existing non-locking cap
· Self-locking, no maintenance


All of our Anti-Siphons install easily in most HD & MD Freightliner, Kenworth, Western Star, Sterling, Volvo, Mack, International and Peterbilt diesel fuel tank necks, as well as many buses and foreign Class 7 Trucks.  Anti Siphons are guaranteed for the life of the fuel tank they are installed in.  They do not restrict fueling and there is no splash-back. Over 800,000 in use!
These patented snap-in Anti-Siphons are an inexpensive and effective solution to help prevent fuel theft.  Made in the U.S.A. from the finest quality materials, these Anti-Siphons are designed to foil the most determined fuel thief.
3-7, 25-675, 25-7, 225-7, 4-9 & P-67 are for Heavy-Duty Truck Diesel Fuel Tank Applications.  187-75, 2-7, & 2-7K are for Medium-Duty Truck Fuel Tank Applications. 
Measurements are from the Inside Diameter (ID) of the fuel tank neck. Freightliner Class 8 are 2 1/4” ID.  Volvo, Mack, and International are either 2.5" or 3"ID.   Sterling are 2 1/4” or 3”ID.  Kenworth are normally  2 1/2”. A measurement of the ID of the fuel tank fill neck is always advised.     Medium Duty Class 7 International  are usually 1 7/8" ID, Kenworth and Freightliner (M2) are 2"ID.  Reefer tanks are 1 7/8"ID. Anti-Siphons will install in male threaded fuel necks at least 3” long.  Many Locking Caps are not compatible to use with a fuel fill neck that has an Anti-Siphon installed .
 


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