Not having adequate water pressure in your shower can lead to problems getting soap out of your hair and increasing the amount of time it takes to shower. Low water pressure can also lead to dripping down the shower wall, which can shorten the life of silicone sealers. You can increase the water pressure to your shower by increasing the water pressure to the entire house. To do this, you must make a slight adjustment to the main water pressure regulator inside the house.
Locate the water-pressure regulator device. The regulator is shaped like a bell, and is almost always located near where the main water supply enters the home. This could be inside the basement or inside a crawl space.
Place an adjustable wrench around the locknut at the base of the regulator.
Turn the locknut counterclockwise three turns to loosen the nut. Do not remove the nut.
Insert a screwdriver into the screw on the very top of the regulator.
Turn the screw clockwise to increase the water pressure to the entire home. The regulator will be set to about 50 psi. Do not move the screw to more than 60 psi, as referenced on the small chart around the screw.
Tighten the locknut around the base of the regulator.
Check the shower's performance with the new settings, and make further incremental adjustments as needed.