A few years ago I was watching the one show and they said that the average shower uses as much water as the average bath. At the time I felt relieved as I lived in a place that only had a bath and I was concerned I was using too much water from an environment standpoint. Last week, in light of the droughts etc there was lots on TV about having showers instead of baths as it uses a third less water. So the next time I had a shower, I put the plug in and sure enough I collected a bath full, the amount I would use to have a bath. I'm a quick showerer so how is this possible?
For context, I have a bath tap connected shower up on the wall, water pressure is good. Have I just got an outdated system and more modern set ups have different technologies to save water?