As we mentioned earlier, all showerheads in the US are going to be capped to a maximum of 2.5 GPM as they can’t legally be sold more powerful than that. In order to meet that, showerheads will contain a flow restrictor. For example, if you have a 1.8 GPM model, you can remove it to make the flow rate stronger. The obvious negative to this is that you’ll be using a lot more water, which may increase your bills.