VIDEOClick to see full answer. Correspondingly, how do you fix low water pressure in bathroom?If the low water pressure is affecting the bathroom faucet then a good start is to check if the aerator is causing the problem. Remove the aerator and test the faucet with the aerator off to see if it has good pressure, if it does then you will need to clean or replace the aerator. why do I have low water pressure in one bathroom? Low water pressure in the entire bathroom signifies a blockage or leak in the main pipe that supplies water to it, and the problem may also affect fixtures in other rooms. You can usually flush these after turning off the heater and allowing the water to cool. Air in the pipes can also cause a blockage. Likewise, how can I increase water pressure in my bathroom? How to increase water pressure in your shower Clean the shower head. Check for a flow restrictor. Check for kinks. Check that the valve is fully open. Check for leaks. Open the water heater shut-off valve. Flush the water heater. Buy a low-pressure shower head. How do I adjust my water pressure?Position the jaws of the wrench over the top nut of the adjustment screw. Turn the screw in a clockwise direction to increase the water pressure and a counterclockwise direction to decrease water pressure. Make the adjustment one or two full revolutions at a time. Open a water faucet to test the pressure.