DIESEL Keeper is the trade name of North American Truck and Machine Accessories, LLC, or NATMA.  We manufacturer truck and machine accessories, most notably our anti-siphon devices. DIESEL Keeper Anti-Siphon Devices are patent pending and designed to outperform the existing alternatives to protecting diesel fuel from siphon thieves. Our anti-siphon devices (ASDs) protect 100% of your diesel fuel compared to 50 to 90% that competitors are able to protect. Our ASDs are made from stainless steel making them virtually impenetrable.

Diesel Keeper is the leader in diesel fuel protection.

Our unique design has exceeded our own performance requirements. The Diesel Keeper ASD units have two anti-siphon grids, on on the top and one on the bottom. The grid slots are engineered to be precisely small enough to not allow any type of siphoning tube through, while maximizing the flow rate through the grid. The results is unrivalled performance and security you can trust.

Alll of our anti-siphon devices come with an amazing lifetime guarantee. Install it once and never worry about your precious diesel fuel again. The unit installs with snap off screws to prevent the unit from being taken out by would-be criminals. Protect 100% or your fuel investments with the new line of Diesel Keeper products.

Thank you for choosing DIESEL Keeper! We trust that you will be excited about our product lines.

Sam Cloete
President - Diesel Keeper