If your car breaks down with a full tank of gas or one of your vehicles is empty and the other is full, you may want to siphon the gas out of the vehicle’s tank.
This process is simple and when done correctly, does not result in getting gas in your mouth. However, remember that siphoning gas from someone else’s vehicle is illegal, so do not use this method to get gas.
HOW THE TECHNIQUE OF EXTRACTING GASOLINE WITH A HOSE WORKS (THE SCIENCE BEHIND IT)
Instead of going on and on about the hose and the physics procedure, it is much easier to watch the following short video. This video will give you a basic understanding of how and why the siphon works.
Sure, you can siphon gas with a hose without learning these things. But if you do, you’ll be better equipped to successfully siphon fuel in all kinds of unique circumstances.
Things required to siphon gas out
- Gasoline siphon pump
Steps to Siphon Gas out
Step 1: Place a five-gallon bucket on the floor to deposit the gasoline in when it starts to flow. Cut a length of plastic hose, large enough in diameter to fit through the hole in your gas tank, and about 6 to 8 feet long. Do not use a garden hose, as you will not be able to see the gasoline flowing unless the hose is transparent.
Step 2: Make sure your car is turned off and unscrew the gas cap. Insert one end of the hose and push it below the gas line. If you are not sure if it is below the gas line, blow through the hose and try to hear a bubbling sound. If you don’t hear it, push the hose further.
Step 3: Lower the other end of the hose so it touches the floor, then twists it in a circular motion to create a loop. Stand on a sturdy chair or box so that you can hold the end of the hose higher than the gas tank.
Step 4: Clean the hose to sterilize it and slowly suck on the end. Watch as the gasoline begins to flow through the loop. As long as you hold the end of the hose well above the gas tank, the gasoline should not flow up the loop and into your mouth. This eliminates the risk of swallowing gasoline; however, you should do it slowly for your safety. Once the gasoline has filled the loop, stop sucking on the hose.
Step 5: Place the hose in the bucket, and move it so that the loop straightens and the gasoline begins to flow into the bucket. It should flow all the way into the bucket, and you can remove the hose and put the gas cap on. If the gasoline stops flowing for some reason and you think there is gasoline left in the tank, do not try to remove it. You will need to flush and sterilize the hose before trying again.
Most newer cars are built with emergency anti-leak technology. This prevents fires in the event of a crash or rollover. This is a nice feature in general, but it’s a pain in the butt when you need to siphon gas from the tank.
However, there are ways around this. Some anti-siphon mechanisms can be bypassed with a screwdriver. Sometimes you can hold them open while you insert the hose into the tank. But you must be extremely cautious not to damage your vehicle’s fuel tank in the process.
Other techniques require that you use a smaller tube to siphon. A smaller tube can subvert the ball lock or butterfly mechanism. This is feasible but slows down the process tremendously.
A 2.5-centimeter siphon hose can move approximately 4.5 liters every two minutes. But, a 0.635-centimeter pipe does the same in eight minutes.
As you can see, some cars are also better at siphoning gasoline than others. In general, older cars have less technology, so it will be easier to extract fuel.
Hi, I’m Liam. I’m the initiator and writer of this blog. Cars were and will be my first love, and my favorite hobby, that’s why I decided to start this blog and write about my discoveries and techniques to improve my cars or repair them.