The electric fuel pump delivers fuel to the engine and it supplies the rail with more than enough fuel to satisfy engine requirements. We have two basic types of electric fuel pumps ; Semi-kits assemblies and In tank mounted modular types with reservoir & bracket assemly. The fuel strainer is located inside the tank and provides the first fuel line of defense against fuel system contamination. On modular units, two types of strainer are used. One is mounted outside the plastic reservoir, while the other is located below the fuel pump. Non-modular units typically use a single strainer.