Water pressure .

If the galley tap is a modern residential version of anything with a single lever control, it may be plugged up with scale from the water heater. To clear this, you may have to figure out how to take it apart and find where the internal screen is so you can get the little ball of white scale out of it.

I have to do this with ours kind of regularly.

Why doesn't this happen at home? Because that water heater is bigger and the scale can collect in the bottom.

Matt