Thing is that integrated circuits are small and don’t require much effort, there’s a lot of copy-paste
If you would be able to operate pumps and valves with circuits it would be too easy to grief the station, by causing floods and such or messing with SM while people are unable to pinpoint the issue.
Some time ago I was proposing another system of circuits, similar to atmos piping and plumbing. You would have all sort of devices like logic gates, some input and output devices like gas sensors, lights or mentioned pumps. If one of those devices was signaller, compatible with already existing signaller and by it with things like igniter, timer, proximity sensor etc we may actually have a way to build quite advanced and interactive things, especially if we would add at least on/off wire to more machines around station.
These devices would be connected by wiring, already existing mechanic that has little to no use, in a fashion similar to pipes and ducts.
System like that would be consistent with atmos and plumbing, which would make it more accessible to people (it would be simple and similar to other systems they already know and they could study work of others contrary to IC which are blackboxes), copy-pasting ready solutions is gone, you actually have to build your circuit, you are also limited because your circuit is stationary and takes quite some space (we could add layers for wires and circuit devices so space won’t be too limiting).
I see no reason for pump not to be controlled by circuits of this kind