Removing the flow restrictor valve on your shower head takes less than 60 seconds of work and can drastically improve the water pressure from your shower head.
All you need is a screw, a screwdriver and probably a pair of pliers. Typically it’ll be a small blue or other colored valve inside the shower head, and sometimes has a small aerator mesh or ring in front of it than can easily be pulled out. You can screw into the valve, pull it out with a pair of pliers, put the shower head back on and you’re done!
Side note, depending on your water pressure, this may seem very powerful at first! But if you have long or curly hair, this is wonderful for helping get more soap out of your hair more quickly. This also will use more water, but if you’re like me I end up taking shorter showers since it takes a shorter time to rinse off.
I live in an apartment and have a pretty small hot water tank. I changed the whole showerhead to one with higher flow, but now i run out of hot water much faster.