Water Line Replacement in Pennsylvania

What the water service line is

The service line is the pipe that brings drinking water from the utility’s main under the street to your house. It runs from the main to a curb stop (a shutoff valve near the property line), then under the yard and through the foundation to the meter and main shutoff inside. In most of Pennsylvania, the utility owns the main and usually the part up to the curb stop, and the property owner owns the rest. Your utility can confirm exactly where the line changes hands.

What older service lines are made of

The material depends mostly on when the house was built and what the utility used at the time:

• Lead: used in many older systems, particularly before the mid-twentieth century. Lead pipe is dull grey, soft enough to scratch easily with a key to a shiny silver colour, and a magnet won’t stick to it.
• Galvanized steel: grey, hard, and a magnet sticks to it. It corrodes inside over decades, narrowing the pipe and sometimes releasing rust. Galvanized pipe that was ever connected downstream of lead can also hold lead.
• Copper: the colour of a penny where it is scratched; a magnet won’t stick.
• Plastic (polyethylene or PEX): common in newer lines, usually black, blue or white.

You can check the pipe where it enters the basement, just before the meter. If you aren’t sure, a plumber can identify it, and your utility may already have a record.

Lead service lines: what has changed

Under the EPA’s Lead and Copper Rule Improvements, finalized in October 2024, most water systems must identify lead service lines and replace them within about ten years, with additional time for a limited number of systems. Utilities have also been required to publish inventories of service line materials. If you received a letter saying your line is lead, galvanized requiring replacement, or of unknown material, ask your utility:

• What their records show for your address and how they determined it.
• Whether they will replace the private side, the public side, or both, and on what schedule.
• Whether any cost-sharing, grants or loans are available.
• What steps they recommend in the meantime, such as running water before drinking and using a certified filter.

Replacing only part of a lead line can temporarily disturb lead, so coordinate private-side work with the utility’s plans whenever possible.

Signs a service line needs replacing

• Pressure that drops gradually over years, typical of corroded galvanized pipe.
• Rusty or discoloured water at the first draw of the day.
• A wet, soft or sunken area in the yard along the line, or water bubbling up near the curb.
• The meter moves with the house shutoff closed, which points to a leak between the meter and the house or at the valve; see leak detection.
• Repeated repairs on the same line.
• Lead or galvanized material identified by you, a plumber or the utility.

How replacement works

Open trench

A trench from the curb stop to the house exposes the whole line. It is straightforward and lets the plumber see everything, but it disturbs lawn, landscaping and sometimes a walkway.

Trenchless methods

• Pulling or bursting: the old line is pulled out or split while new pipe is drawn in behind it, using small pits at each end.
• Directional boring: a new path is bored underground and new pipe pulled through, leaving the old line abandoned.

Trenchless methods save surface restoration but depend on soil, depth, the route and what is in the way. A plumber will look at the site before recommending one.

Inside the house

The new line comes through the foundation with a proper seal, then connects to a new meter setting or the existing one and a new main shutoff valve. Ask for a full-port ball valve that is easy to operate in an emergency.

Choosing the new pipe

The new line should suit your soil, the distance to the main and your utility’s rules. Common choices:

• Copper (type K): long-lived and traditional for service lines; costs more and can be affected by very aggressive soil or water.
• Polyethylene (PE) tubing: flexible, resistant to corrosion, comes in long coils with few joints, and works well with trenchless pulling.
• PEX: used for some service lines where codes and the utility allow it; must be protected from sunlight and installed with approved fittings.

Many utilities specify the materials and the size they will accept between the curb stop and the meter. A plumber familiar with your utility will know the requirement.

Water pressure basics

A new, wider service line often fixes the low pressure that comes with corroded galvanized pipe. The opposite problem matters too. Model plumbing codes of the kind adopted in Pennsylvania generally call for a pressure-reducing valve when the static pressure coming into the house is above 80 psi, because high pressure wears out fixtures, valves and water heaters and causes banging pipes. Local amendments can differ, so ask the plumber to measure the pressure during the job and confirm what your code requires.

If the house has a pressure-reducing valve, it usually sits right after the main shutoff. Those valves wear out over time, and a failing one can cause pressure to creep up or drop off.

Questions to ask when comparing quotes

• Which method: open trench, pulling, bursting or boring? Why that one for this yard?
• What pipe material and size, and does it meet the utility’s requirements?
• Who pulls the permit and schedules the utility shutoff and inspection?
• Does the price include a new main shutoff valve, the meter connection and the foundation seal?
• What surface restoration is included: topsoil and seed, or paving repair?
• If the line is lead, how will the work be coordinated with the utility’s replacement of the public side?

Permits, utilities and digging

• Most service line replacements need a permit from the municipality or the water utility, and many utilities require their own inspection or that they make the connection at the curb.
• PA One Call (811) must be contacted at least three business days before excavation so buried gas, electric and communication lines can be marked. When you hire a contractor, the contractor makes the request.
• The utility usually has to shut off water at the curb stop. Plan for water to be off for part of a day.

What affects the cost

• Length and depth of the line and the method used.
• What is above it: lawn, driveway, steps, trees or the sidewalk.
• Who does what: whether the utility replaces the public side at the same time.
• Interior work: a new meter setting, shutoff valve, or pressure reducing valve.
• Restoration of lawn and paving.
• Assistance programs for lead lines, which some utilities and municipalities offer.

Water line questions