To increase water pressure in a shower, you should first unscrew the showerhead and soak it in white vinegar to clear out mineral scale clogging the spray holes. Removing the internal plastic water flow-restrictor disk will also increase water volume. If your entire house suffers from low water pressure, adjusting the home's pressure-reducing valve (PRV) clockwise or servicing the water heater shutoff valve will raise shower performance. Verification: Test the shower spray after cleaning to confirm stronger water velocity and coverage.
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