What “no pump” actually means
It is the strongest thing about this range and the easiest to misread. No pump does not mean no pressure.
Most reverse-osmosis systems carry a booster pump because mains pressure alone will not push water through the membrane fast enough. A pump means a power supply, a transformer, a failure point and a running cost.
The KomiBright under-sink and commercial models do without one. They are built to work on the pressure that is already in the pipe — which is a genuine engineering claim, and a different claim from working without any pressure at all. Each model states a minimum, and below that minimum it will not perform to its rating.
The one exception
The KB-A95R carries a 25 W self-priming pump and runs on a 12–24 V supply. It is the only model in the range with a pump or any electricity, and that is deliberate: it is the one built to draw from a river, a lake or a tank, where there is no line pressure to work with.