To help out, we explain here the benefits of these high-pressure designs. We also present three of the worthiest 1.5 GPM models you can buy. 1. High Sierra 1.5 GPM High-Pressure Shower Head Our Pick ...

The flow rate indicates how much water can flow out of your shower head and is measured in gallons per minute (GPM). Federal regulations mandate shower head flow rates can't be higher than 2.5 GPM ...