Simply put, I think this is the best low flow showerhead on the market. At max flow, it achieves 6 L/min (regular showerheads are 9 L/min), but with the optional valve it can be turned down even further (I highly recommend getting the valve). The best part is that unlike all other low flow showerheads I've tried, this has fantastic pressure. It feels like a regular flow showerhead, if not better! Honestly, I set my valve half closed because fully open it has too much pressure! (Which means that I'm now at 5 L/min). Yes, this is the one low flow showerhead that you won't remove after a week. They cost $45 with the valve, come in several different colours, and they ship to Canada! This is a great way to not only conserve water, but reduce your energy consumption.