Suppose a company has developed a modification for almost all types of tanks such that when the tank is filled with an incoming fluid (which is at a certain pressure), it stores this pressure and uses it to take the fluid out of the tank with pressure, i.e even if the tank is at low altitude it will give out the fluid at a high pressure (maximum pressure will be equal to the input pressure) such that it can easily reach higher heights (or, apparently the places where the fluid needs to be supplied with pressure). This modification will be extremely cheep (negligible consideration of price). Another advantage can be that even if the input pressure is low, the tank can be modified (in real time) to accommodate that low pressured fluid, and after the tank has been filled, pressure in the tank can be increased manually or by a low powered motor till the desired amount to suffice requirements. The motor will be turned off after a desired pressure has been reached. So...what will be the scope of such a modification (globally) if the company starts selling such units (or at most, some personnel will come and set it for you) to modify any given tank as stated above? For example, water storage tanks can be put to lower altitudes or even underground, yet water will be directly send from this tank to multi-storied buildings/houses.