Actually although i was off topic this was hijacked by a supplier who bit hard when i mentioned another suppliers R&D programme.I wasn't supposed to say anything, but it wasn't boxes, as the supplier who jumped in supposed, it was pump boards.
The tool for the job is a pump board- not a pump box.The pump box was designed primarily for trailers or when some element of 'outside' was involved.
As stated a pump board has an out and an in, a strainer, a flow controller, a fuse, a pump, and two wires to go to a battery.Ideally it should have two holes or similar where it can be 'hooked' in situ and then easily removed.It has several advantages over a box.
In addition but seperatly to this a system should also have an inline filter, especially for those who have a heater matrix.