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  • Easy installation.  A mallet or block of wood may be needed.  Comes with a new clip for the chain.

Anti-Siphon Device

0.00 LBS
Calculated at checkout

Product Description


Don't let your hard-earned money be siphoned from your truck by thieves. Keep vandals from filling your tank with grass trimmings - buy and install our quality anti-siphon devices.

For diesel trucks: Shown here for Freightliner with Push and Turn style fuel caps. (Neck ID of 2.25").

Our robust Anti-Siphon Device is made from steel (plated with rust resistent zinc or black oxide).

  • Holds the fuel nozzle. Fast fueling possible. Fits below existing fuel cap.
  • No openings larger than 1/4".
  • Ideal for medium-sized to large fleets. No keys. Installation is permanent once properly installed.
  • Comes with a clip to attach your fuel cap chain to the inside of the Anti-Siphon Device.


Our Anti-Siphon Devices - click for:

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Product Videos

DIESEL Keeper™ Anti-Siphon Device Installation on Freightliner Class 8 Fuel Tank EBAY 03:20

See how to properly install Anti-siphon Devices (ASD's) from DIESEL Keeper™ on a heavy duty or medium duty trucks. Here we install product code "D-AS48F" on a Freightliner fuel tank (showing underside of tank cut-out also). Our anti-siphon devices for Volvo, Mack, Reefers, International, Hino, GMC, Kenworth, Sterling, Western Star, etc. are installed the same way. Visit our store for even more!

  • DIESEL Keeper™...
    See how to properly install Anti-siphon Devices (ASD's) from D...

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