Water pump location

Thanks for your information guys.
Ours is a 2017 Warwick xl. It came with an external fill point and a submersible portable pump. The pump will work from an external tank (caravan roller tank) or the filler can be connected to a mains tap if available on the pitch and within reach of the short hose.
As you will know there is nowhere on these vans to carry a roller tank!
But I have used a collapsible bucket on a few occasions when the fresh water tank was empty and I did not want to go to the trouble of moving the van to the nearest freshwater tap.
So I guess it's a question of whether I am prepared to risk the failure of the underfloor pump or go to the trouble of fitting an internal pump now just in case?

I would still appreciate any pictures anyone has showing the access/method to change the underfloor pump.

Thanks all.