The answer to 'supply line replacement frequency' is that supply lines, which connect water fixtures to the main plumbing system, generally need to be replaced every 5-10 years. These flexible pipes are susceptible to wear and tear over time, and can develop leaks or cracks that can lead to water damage if not addressed. Replacing supply lines proactively can help prevent costly repairs down the line.
The frequency of supply line replacement can vary depending on factors like the quality of the materials, water pressure, and how often the fixtures are used. Homeowners should inspect their supply lines regularly for any signs of wear, such as cracks, bulges, or discoloration, and consider replacing them if they appear to be in poor condition.