CampervanJames

Hello, I’m about to embark on a campervan conversion, I need to carry a considerable amount of fresh water to supply taps and shower, I’m intending to use 6x 25l water drums, from these 6 drums I’m hoping to be able to connect them up in unison so 6 hoses running to the bottom of each drum and then joining to one feed pipe to a pump, I imagine that the force of gravity will mean that all 6 drums will empty evenly, if I’m wrong on this please correct me? This however is not my question or at least not the question I’ve really come here to ask. So what I’m really wanting to know is whilst it would be feasible to remove each drum to refill I wondered if it would be possible to fill the drums up in situ by adding a hose pipe along with some valves to change from the feed to the pump to an inlet for a hose pipe, I’m assuming that using the same hoses that go to the bottle of the drums as the drums would fill there would be an increased amount of pressure needed to fill them due to the gravity of the water above the bottom of the hoses and wonder whether the pressure from a typical water mains would be sufficient to overcome this? Alternatively I considered adding an extra hose to each drum that doesn’t go all the way to the bottom for filling purposes, I expect in doing this I would still need to go down a bit to insure they also fill evenly? Any thoughts on this would be greatly appreciated, thanks.