(TM Gravity Model - Liquid Transfer Gasoline Siphon Pump 18' of Fuel Hose & Modern Car Adapter - USA Hose & Assembly- See all 5 models - search by GENTAP in Amazon search bar

This fuel siphon device works well and is well worth the cost. My vac pump died, after a few cheap plastic siphon pumps (which failed quickly) I was ready for quality again. It's a well designed and quality device, I was able to transfer fuel, easily, from two different cars. With a plastic gas can, on the floor, It siphoned 1 gal every 4 min for me. Not super fast, but quite acceptable. The bulb pump feels like it is quality made and the suction came quickly. It has an inline fuel filter (a nice touch) and comes with a few accessories that make getting to the fuel easier. For example, the yellow funnel looking thing holds open the flapper cover on my mid 90's vehicle so it does not pinch the line. Long story short: it is well thought out and seem to come with all you need. I really wish I had done myself a favor and bought this sooner. I will give another update later on to see how well the fuel lines hold up to the gasoline, once I have about 6 months of use on it.

Works great. I put a towel on my trunk lid. Set a 5 gallon gas can there. Feed the line through the funnel into the gas filler and drop the hose into the gas can. The primer works great to start flow.To improve it I made 2 changes: I put a brass fitting on the end that goes in the gas can to weigh it down to sink to the bottom of the can. I put hose clamps on the hose to both side of the filter to keep it from slipping off. Other than that it's made from first rate parts and is a quality product.

My GasTapper Gravity Model arrived last week and I got to use it yesterday for the first time. I needed to drain a fuel tank on a 1980's car for repair.The instructions may not be perfect, but after reading them and understanding how it's supposed to work I was able to get things going.For Cars.1) The smaller in diameter of the two white pvc tubes goes into the tank after you remove the cap and put in the supplied Yellow Funnel. In my case it didn't matter if I put the barbed end or not.2) Push that small White PVC tube down till you can't anymore, then use a combination of twisting and pushing to get it over the obstruction.3) Blow into the line and listen for bubbles, that will tell you when you've hit the fluid in the tank.4) If your not getting any where with just the small PVC tube, back it out and insert the larger White PVC Tube into the Filler Neck until it stops. Back it out a tab, then run the smaller White PVC Tube inside the larger one, working it as mentioned before.5) Once you've hit the fluid in the tank insert the Small White PVC Tube into the Yellow hose attached to the Pump apparatus. Look at the Blub/Pump. It has an arrow stamped on it. That's the direction of fluid flow. The Yellow hose w/the metal coils wrapped around it goes into the receptacle and the other side is where you put the PVC tube.6) Close the White Clamp on the Yellow hose, drop the Blub/Pump below the fuel source and start squeezing the pump. When gas starts to flow open up the white clamp.All that being said, while the device does work, as others have mentioned it's quite slow. It took well over an hour to drain 5 gallons of gas. I would imagine that has to do with the small diameter, .25", of the tube placed inside of the tank. Just not going to get much volume flowing through anything that small.I suppose of you didn't need to use the small PVC tube and could just drop the end of the Yellow hose into the receptacle your trying to drain the flow rate would be much higher.I'm still giving the product 5 stars for innovation and the fact it does do what I got it for, removing fuel from the Car's tank.I have one of those "jiggler" siphons for other purposes like filling and removing Kerosene from heaters. For obvious reasons that wasn't the right tool for the application this time around.

Takes a long time to siphon. Can’t get it to prime on its own and have to manually pump fuel through the primer bulb. Does work great in getting fuel from deep down into a cars fuel tank.

Reading other reviews I might concede that other folks may have liked it; but for me, it was worthless. Never could get it to work, and after attempting to hand pump a few drops thru it for barely a minute I simply gave up. I wanted to drain a gas tank but EVEN IF i could make this work...I didnt have all day/night to wait. I'm older now & barely minute of hand pumping/squeezing it set off my arthritis and tendonitis. The tube/s are miniature. IF it even worked i would have been there all night. After a certain age Time is more valuable than money. I intend to return it. A buddy at a shop recommend 'The Jiggler' and a much bigger hose than this supplied hose & nylon tube. I ended up having a buddy rigging up an old, spare electric Holley Blue pump with set of alligator clamps a few days later. No messing around, done. I gave it a '2' verses a ONE bc I DO like that it had a built-in, inline filter. In the even t of an emergency I rather have a mouthful of gasoline than the aggravation this caused me.

This Siphon worked great. I had to drain the gas tank from my pickup truck (because the fuel pump failed) which had 36 gallons of gas in it. I was able to empty the fuel tank in no time at all. I just put the hose down the fuel neck squeezed the siphon bulb 3 times and the gas started coming out the hose into my gas cans. Simple to use and no mess. Much better than the Harbor Freight one that I tried 1st, the difference is like night and day.Buy it you won't be sorry.