How to Make a Simple Diesel Siphon Machine

Written by leonard telford
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How to Make a Simple Diesel Siphon Machine
It can be easy to inadvertently fuel a gasoline-fuelled car with diesel. (The modern car at petrol filling station image by terex from

Diesel is a useful fuel that powers a wide range of vehicles, from cars to trains. It is easy to inadvertently fill a gasoline-fuelled car with diesel, especially if you use a diesel vehicle for work purposes. A simple siphoning machine will save you hundreds of dollars in repair fees if you spot your error in time. This machine will remove the diesel from your fuel tank.

Skill level:

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Things you need

  • 1/3-horsepower utility pump
  • 2-yards garden hose
  • Clamp
  • 1-yard pipe with national pipe thread
  • Large metal bucket

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  1. 1

    Attach the garden hose to the inlet of the utility pump. Secure with a clamp.

  2. 2

    Attach the pipe to the outlet of the pump. Lead the pipe to the bucket.

  3. 3

    Place the hose into the fuel tank of the car, switch on the pump, and allow it to drain the diesel into bucket.

  4. 4

    Move the hose further in to the tank and from side to side when the pump has stopped drawing diesel. There should be no sounds of sloshing diesel. It is now safe to add gasoline.

Tips and warnings

  • Place the pump onto a low table or chair to allow the outlet to drain directly into the bucket.
  • Inexpensive utility pumps are made of plastic. After a couple of uses the plastic will degrade and stop working. This should be only used in an emergency.
  • Do not use this siphon procedure to remove gasoline from a fuel tank. The lower flash point of gasoline makes this too dangerous. If in doubt, contact a professional.

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