This very useful tool is a must for any home or garage. It can be used on bikes, cars, vans, lorries, boats, garden machinery, aquariums - plus any other fluid transfer application. It does not require gravity to allow it to work, it will pump from a lower source to a higher source. Can also be used as a pump for inflatable toys and beach balls. Can be used to remove fuel from cars, diesel wrongly put into petrol car tanks. Removing gearbox and Atf fluids. Have you ever over - filled with engine oil? If you own this there is no problem, this pump can extract the excess. It is simple to use - a few hand pumps will start a continuous fast flow of liquid from one source to another, for as long as you keep pumping.