Responsibility for low water pressure depends entirely on where the pressure drop originates. If low pressure affects only a single faucet or showerhead, the homeowner is responsible for clearing clogged aerators or replacing faulty valves. However, if low water pressure affects every fixture simultaneously throughout the entire house, responsibility may lie with your municipal water utility provider (due to main line leaks or municipal supply restrictions), a failing pressure-reducing valve (PRV), or a broken well pump pressure switch. Verification: Check whether water pressure drops uniformly across multiple indoor and outdoor fixtures.
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