Fixing low water pressure in a house can cost anywhere from $150 to $1,500 or more, depending entirely on the underlying root cause of the restriction. If the low pressure is caused by a simple clogged aerator, a partially closed main shutoff valve, or a faulty pressure reducing valve (PRV), repairs or PRV replacements typically run $250 to $600. However, if low pressure is caused by severe mineral scale buildup or corroded galvanized steel pipes throughout the home, repiping can cost several thousand dollars. Verification: Test household water flow at multiple faucets after repairs to confirm improved pressure.
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