repiping

Repiping is the process of replacing the water supply piping in a building. It is usually undertaken when existing pipes are deteriorating, corroded, or unable to deliver reliable water pressure and quality. Common triggers include frequent leaks, low pressure, discolored or metallic-tasting water, and aging pipe materials such as galvanized steel or copper with pinhole leaks. In some cases, repiping also removes lead pipes to reduce health risks.

Repiping can be partial, replacing only the sections that fail, or a full house replacement that upgrades all supply lines. Materials used today include copper, PEX (cross-linked polyethylene), and CPVC (chlorinated polyvinyl chloride). Copper is durable but costly; PEX is flexible and often quicker to install; CPVC offers a rigid alternative. Older homes may require removal of galvanized steel or conversion from lead service lines.

The process typically requires a licensed plumber, possible permits, and code inspections. Work involves shutting off the main water supply, accessing walls or crawl spaces, installing new piping with fittings, pressure testing, flushing lines, and repairing walls. Because repiping is disruptive, many homeowners plan for some construction and drywall repair.

Costs vary widely based on house size, materials, and complexity, but repiping generally represents a significant investment and can take several days to a couple of weeks. Benefits include improved water pressure, reduced leaks, less risk from lead exposure, and potential energy or water-use efficiency gains.

Alternatives for some situations include pipe relining (epoxy or cured-in-place lining) or partial reline, which can minimize disruption but is not suitable for all pipe types or locations. Always consult a licensed plumber to assess feasibility and to ensure compliance with local codes and warranties.