[Dave at Pelican Parts]

The third fitting is for a return directly from the pump. It connects to a "Y" fitting that goes to the return line in the center tunnel and the fuel pressure regulator.

Replace the "Y" and its hoses with a single piece of hose. Run it from the plastic line coming down through the engine tin, to the center tunnel line.

The important things about a fuel pump are: 1) that it delivers enough pressure, but not too much for the system to deal with; 2) that it delivers enough volume; 3) that the hose fittings are the right sizes; 4) that the electrical connections are correct and the pump doesn't draw too much power for the existing wiring; 5) that it physically fits in place.

I have no idea if your GTI pump meets any of those requirements. Note that too much pressure can cause leaks, and may damage other parts of the fuel system. Also, having the hose fittings the wrong size can cause leaks if you "force" the hoses to fit. Leaks are bad... Keep a fire extinguisher handy!

--DD