I started installing the new Fuel System. I purchased 2 4 way 1/2 inch valves. This will allow me to control from a single switch where the fuel is coming from and where it is going to. I will have the means to pump fuel from any tank to another and filter it if needed. I am using copper pipe that is covered with polyethlene cover. It is used here in Ontario for hooking up oil tanks for home heating. Read more at the link:
Copper Pipe I figure it can't hurt in the boat. Will protect it from touching other metals and keep water off it. Fool proof, NO, but It might extend the life a few years. The old lines I took out were in really bad shape. Most were green goo. and had lost a lot of integrity. Thy where brittle and snapped. No more flex.
Nice calm valves on the outside:
Chaos on the inside: