Sure, that's what the pressure tank is for. The well pump keeps the 20 gallon tank pressurized, and as the pressure drops the pump kicks on until it is stable again.
Maybe you could get a bigger one if you have a large family, but I've never heard of one that would be large enough to dump that much water except for mountainside cabins that are too far from the water table for a well in the first place.
Maybe you could get a bigger one if you have a large family, but I've never heard of one that would be large enough to dump that much water except for mountainside cabins that are too far from the water table for a well in the first place.