Originally Posted by Diesel911

Just empty the fuel out out of your tank, remove the tank screen clean it. screw it back in a little tight and plug or clamp off the hose (a good time to change the hose). Put a container under your car to catch the fuel and dump in some clean diesel into the tank and open the hose and let the fuel drain into the container. Keep flushing until your not getting crap from your tank.
Remove the tank screen and clean it again if it needs it and reinstall it and the hose. Hopefully all the big stuff will be flushed out.