Fixing low water pressure depends entirely on identifying the specific underlying cause of the restriction. Step 1: Check that your main water shut-off valve is opened completely. Step 2: Unscrew and clean mineral scale out of individual faucet aerators and showerheads. Step 3: Replace clogged whole-house water filter cartridges. Step 4: Inspect and adjust or replace a faulty pressure reducing valve (PRV). If you have a well, check the pressure switch and tank bladder. Verification: Test water flow at multiple household faucets after completing the repairs.
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