paul13 on here had a van kitted out differently from yer normal tank in the back. He had his pump inlet hose not into your standard tank but into barrel's, the hose had t splitter on end so it can pull from two drums at same time. So when those empty you just fire hose into the next two drums n so on. I was thinking of doing it with some 60 ltr drums. Drums held in using ratchet straps n lashing points
this system means it can be taken out easily if ye need van for something else. Honestly cannot be bothered drilling through floor and sorting spreader plates all over again for new system in new vehicle.