What is submersible fuel pump?

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A submersible fuel pump is a kind of pumping device which has a hermetically sealed motor close-coupled to the pump body. Whole assembly is submerged in the fuel to be pumped. The main advantage of this type of pump is that it prevents pump cavitation, a problem associated with a high elevation difference between pump and the fuel surface. Submersible fuel pumps push fuel from underground tank to fuel dispensers that are connected to this line.