Responsibility for low residential water pressure depends entirely on where the restriction originates. If low pressure affects only a single faucet or showerhead, the homeowner is responsible for cleaning aerators or replacing faulty cartridges. However, if low pressure affects every fixture simultaneously throughout the entire house, responsibility may lie with your municipal water utility provider (due to main line leaks or supply restrictions), a failing pressure-reducing valve (PRV), or a broken well pump. Verification: Compare water pressure across multiple indoor taps to determine if the issue is localized or whole-house.
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