1989 fleetwood Econoline 350 fuel leak

It looks like the fuel tank selector valve must not work, so they bypassed it using a piece of tubing. If you want, you can either troubleshoot the dual tank system to fix it, or keep the bypass in place. You can buy another inline fuel filter to put in place of the tubing. It will have the correct connectors on it for the hoses. You should not need a tool to remove the hoses from the tubing being used as a bypass connector.

http://www.ebay.com/itm/NEW-OEM-Ford-Fuel-Reservoir-1987-1989-F-Series-1987-1991-Econoline-All-EFI-/261138730277