This project’s low cost is $1,125 to replace a 10-foot long main line with PVC pipe using a trenchless installation. The national average for replacement ranges from $1,500 to $12,000, with most homeowners paying around $3,750 for replacing a 25-foot long main line with galvanized steel using a trenchless installation. Expect costs to rise from 4% to 8.5% over 2023 for any plumbing project, including main line installations. Raw material cost increases and ongoing plumber shortages are projecting increases for “behind the wall” plumbing to continue through 2023 and beyond. Many factors impact the cost of a new water line, including how far the line must travel, pipe diameter, and material. If it fails, you may notice problems like a pressure drop or a higher water bill. It is located underground, where it cannot be seen, and lasts up to 50 years when installed properly. It carries fresh water from the city’s supply into your home. Your main water line is arguably the most important part of your home’s plumbing. Reviewed by Cristina Miguelez remodeling expert.

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