Help my xud stalls after start up.

[Spoonaltap]

I've fitted an inline filter and still have the problem, the filter I got was clear and after it had been sitting a while I checked it and was empty so think the fuel is going back into the tank? Is there a one way valve in the line to stop this?

Also where is best to get good quality parts? Gonna replace hand pump because looks like someone else has been at it as there is a cable tie wrapped around it and tape round the fuel hose.