# Water Service Line Replacement in San Francisco

> Water service line replacement in San Francisco: the owner's pipe from the SFPUC meter box to the building, galvanized lines, lead, permits and cost.

URL: https://hilltoprepipesanfrancisco.com/water-service-line-replacement/

The owner's buried water line from the meter box to the building replaced, usually in copper, with the permit, any sidewalk work and the connection to the house.

Last Updated: October 30, 2026

- **$2,000 to $6,000** National budgeting range for replacing a typical customer-side water service line; long runs, trenchless work and hardscape run higher
- **$290** DBI 1P plumbing permit when the water service is replaced on its own; within a repipe it can share a 2PB permit ($809)
- **About $802** San Francisco Public Works excavation permit for a small project, if the work opens the public sidewalk
- **1%** SFPUC's estimated chance of lead in a customer-owned line; its plumbers have never observed one

Water service line replacement replaces the owner’s buried water pipe from the meter box at the sidewalk to the building, where it meets the main valve and the house piping. [Hilltop Repipe San Francisco](https://hilltoprepipesanfrancisco.com/) offers and manages customer-side water service line replacement across San Francisco, Daly City and South San Francisco, with the work carried out by licensed and insured contractors under a plumbing permit and inspection. It is often done together with a [whole-house repipe](https://hilltoprepipesanfrancisco.com/whole-house-repiping/), so new interior pipe is not fed through an old line.

In San Francisco the trigger is usually galvanized steel. SFPUC has been replacing its own galvanized service lines and has written to owners whose side of the line it identified as galvanized, recommending they replace it. The material, the route and the ground it crosses decide the job.

## What happens on the first visit

The walk-through starts outside. The meter box is located, along with the path the line takes to the house, and what lies over that path: lawn, a planting strip, concrete steps, a driveway, a garage slab, the public sidewalk. The meter itself belongs to SFPUC, and only SFPUC field staff may open or operate it, so the old line’s material is read where it leaves the meter box if it can be seen, and where it enters the building.

Inside, the main valve is checked and static pressure is measured. Low pressure at the house can come from a narrowed service line, but also from a supply zone, a regulator or a partly closed valve, so a measurement comes before any promise of better flow. The visit notes whether the old metal line is part of the electrical grounding system, which decides the replacement material. The scope that follows names the route, the method, the material, the permits and what gets restored.

## What SFPUC owns and what you own

The water main under the street and the pipe from the main to the meter are SFPUC’s. So are the meter and the meter box. The line from the meter box to the building is the property owner’s. SFPUC states it plainly: “As the property owner, you are responsible for replacing the customer-owned portion of the water service line.” Its rules add that the customer has sole control of water beyond the meter and that SFPUC is not responsible for maintaining or repairing pipes and fixtures past it.

South San Francisco and Daly City follow the same split with their own utilities. In South San Francisco, Cal Water takes responsibility only on the utility side of the meter, customers maintain their side, and leaks Cal Water reports to an owner are to be repaired within five business days. Daly City’s water department asks owners not to turn off the meter themselves, because doing so can damage the service and leave the owner liable. Tenants who receive an SFPUC letter about a galvanized line are asked to pass it to the building owner, since the decision and the cost are the owner’s.

## Main water line replacement: which line is meant

People say “main water line” for three different pipes, and only one of them is the owner’s service line. The city water main under the street is utility infrastructure; a break there is SFPUC’s to repair. The service line from the meter box to the building is what this page covers. The main line inside the building, the trunk that runs from the main valve across a garage ceiling or basement, is part of the interior piping and is replaced in a [whole-house repipe](https://hilltoprepipesanfrancisco.com/whole-house-repiping/) or a [galvanized pipe replacement](https://hilltoprepipesanfrancisco.com/galvanized-pipe-replacement/). When a quote says “main line,” it should say which.

## SFPUC’s galvanized program and the letter

SFPUC removed all known lead service lines in the 1980s, about 7,000 of them. Under state law it has since been replacing its galvanized service lines that may have had short lead connectors, called goosenecks or pigtails, between the main and the old pipe. It found lead connectors in 19% of the galvanized utility lines it removed, and scheduled the program to finish years ahead of the state’s 2030 deadline. That work stops at the meter. Where it has happened, new utility copper now meets the owner’s old galvanized line at the meter box.

SFPUC recommends replacing customer-owned galvanized lines because they may have been connected to old lead pipe. It has written to owners of lines it identified as galvanized, and to owners of lines whose material it is still confirming, offering a lead test and an inspection at no charge. A lookup map on SFPUC’s lead page shows identified locations. SFPUC does not pay for the owner’s side.

## Lead and the service line

SFPUC estimates a 1% chance of lead in customer-owned lines, and its plumbers have never observed a customer-owned lead service line. In South San Francisco, Cal Water reports no known lead service lines in its systems. So a galvanized service line is a reason to replace it, not evidence of lead. A tap test answers the question for a particular building: SFPUC charges $25 per tap. The [lead pipes in San Francisco guide](https://hilltoprepipesanfrancisco.com/guide/lead-pipes-san-francisco/) covers the utility’s program in detail, and the [guide to whether galvanized pipes are safe](https://hilltoprepipesanfrancisco.com/guide/are-galvanized-pipes-safe/) covers what old steel means for drinking water.

## Leaking or broken line between the meter and the house

A buried service line usually announces a leak through the bill or the meter rather than a puddle: a meter that keeps turning with every fixture closed, a soft or wet strip of ground, water in a garage at the wall where the line enters. SFPUC’s leak alert program flags continuous use from hourly meter data, and the [SFPUC leak alert guide](https://hilltoprepipesanfrancisco.com/guide/sfpuc-leak-alert/) explains what an alert means. Locating the leak comes first, which the [water leak detection](https://hilltoprepipesanfrancisco.com/water-leak-detection/) page covers. A line spraying water into a basement is an emergency, and [emergency pipe repair](https://hilltoprepipesanfrancisco.com/emergency-pipe-repair/) is available 24/7 for burst lines and leaks that cannot wait.

Whether to repair or replace depends on the line. A clean break in an otherwise sound copper line can be repaired. A leak in old galvanized steel usually means the rest of the line is close behind. Either way, a concealed underground leak qualifies for SFPUC’s higher leak allowance, 100% of the excess water rather than 50% for visible leaks, if the owner applies within 15 days of first notice of the high bill and documents the repair with an invoice.

## Materials and grounding

California’s plumbing code approves copper, PEX and several other materials for building supply. Copper water tube must be at least Type L, though Type M is permitted underground outside of structures, and PEX placed in soil for drinking water must be sleeved in a material impermeable to solvents and petroleum.

The deciding factor is often electrical. A metal underground water pipe in direct contact with the earth for 10 feet or more counts as a grounding electrode under the electrical code, and many older service lines served that role. Where the metal building supply is used for grounding, the plumbing code requires its replacement to be of like material. So the replacement is often copper, unless a licensed electrician provides another grounding electrode, which can mean a separate electrical permit. Where the new line enters the building, a dielectric fitting is needed if copper meets steel that stays, and the city requires a fullway main valve there. Buildings of four or more stories also need a backflow assembly near the meter.

## Trench, sidewalk and permits

In San Francisco, DBI treats water service as plumbing work under a permit. Replaced on its own, it falls under the single-unit 1P category at $290. Replaced together with an interior repipe that includes underground work, it can sit on one 2PB permit at $809. If the work opens the public sidewalk, a San Francisco Public Works excavation permit is also needed, about $802 for a small project. The line is pressure tested and inspected before the trench is backfilled. The [San Francisco repiping permit guide](https://hilltoprepipesanfrancisco.com/guide/san-francisco-repiping-permit/) covers the DBI steps.

In Daly City, the Building Division’s online portal lists a Water Pipe Replacement permit type, and the fee schedule charges $101 for issuance plus $56.50 for each water piping item; the [Daly City page](https://hilltoprepipesanfrancisco.com/service-areas/daly-city/) has more. In South San Francisco, any replacement of plumbing requires a permit, and the fee is set by job valuation and confirmed per project; the [South San Francisco page](https://hilltoprepipesanfrancisco.com/service-areas/south-san-francisco/) covers the city’s rules.

## What it costs

A national budgeting range for replacing a typical customer-side service line is $2,000 to $6,000, with long runs, trenchless work and restoration of concrete, stairs or pavers running higher. San Francisco permit costs come on top. Labor costs more here than the national figure assumes: plumbers in the San Francisco-Oakland-Fremont metro earn a mean $44.41 an hour, about 28% above the $34.70 national mean, according to the [Bureau of Labor Statistics](https://www.bls.gov/oes/). A wage is not a billing rate, since the hourly price on a quote also carries insurance, licensing, vehicles and overhead. Replacing the line in the same visit as an interior repipe shares the shutdown, the permit and the inspection. The [repipe cost guide](https://hilltoprepipesanfrancisco.com/guide/repiping-cost/) shows both side by side.

## What's included

- Locating the meter box, the line's path and its material at both ends
- Static pressure measured at the building, and the main valve checked
- A route decision: open trench, a new path, or pulling or boring a new line where conditions allow
- New service line from the meter connection to the building, in the material the scope names
- A fullway main valve where the line enters the building
- Transition to the house piping, with a dielectric fitting wherever copper meets steel that stays
- A note for an electrician where the old metal line served as a grounding electrode
- The DBI plumbing permit, and a Public Works excavation permit if the sidewalk is opened
- Pressure test and inspection before backfill, then trench restoration as the scope lists

## Interior repiping or the line from the meter

|  | Water service line | Interior repipe |
| --- | --- | --- |
| What it covers | Buried pipe from the meter box to the building | Hot and cold pipe from the main valve to every fixture |
| Who owns it | The property owner | The property owner |
| Typical cost | $2,000 to $6,000 national budgeting range, plus local permits | $8,500 to $28,000 typical San Francisco-area PEX range, one to three baths |
| San Francisco permit | DBI 1P ($290), or part of a 2PB repipe permit ($809) | DBI 2PA ($549) or 2PB ($809) for a house |
| Usual material | Copper, or sleeved PEX where grounding allows | PEX or copper |
| Openings | A trench or bore path outside, one entry point in the building | Wall and ceiling openings at each fixture group |

## Related resources

- Learn [Are there lead pipes in San Francisco?](https://hilltoprepipesanfrancisco.com/guide/lead-pipes-san-francisco/)San Francisco's lead story is mostly history and small parts: lead service lines removed decades ago, short lead connectors on old galvanized lines, and household fixtures and solder. What SFPUC reports, and what an owner can check.
- Learn [Are galvanized pipes safe for drinking water?](https://hilltoprepipesanfrancisco.com/guide/are-galvanized-pipes-safe/)Galvanized steel is not lead pipe, and San Francisco's tap results are low. The real questions are what the pipe was once connected to, what its rust carries into the water and how much life the steel has left.
- Learn [What does an SFPUC leak alert mean?](https://hilltoprepipesanfrancisco.com/guide/sfpuc-leak-alert/)SFPUC watches every San Francisco meter hour by hour and writes when water never stops flowing. What sets the alert off, how to check it yourself without touching the meter, what it costs to ignore and how to get part of the bill back.
- Learn [Why is my water pressure low in San Francisco?](https://hilltoprepipesanfrancisco.com/guide/low-water-pressure/)Low pressure can start at the street, the service line, a valve, a pressure regulator, the pipe inside the walls or the fixture itself. In a city of hills and old galvanized pipe, measuring before blaming is the whole game.
- Cost Guide [How much does it cost to repipe a house in San Francisco?](https://hilltoprepipesanfrancisco.com/guide/repiping-cost/)Typical San Francisco-area ranges for a whole-house repipe by number of baths, what sits inside the price, the permit fees by city, the programs that help and why two quotes for the same house can differ.

## How a repipe runs

1. The call Describe the building Building type, floors, number of baths and units, the pipe you can see in the garage or basement, and what you have noticed.
2. Walk-through Map the pipe The supply is traced from the meter: pipe map, wall types, the main valve, the water heater and where access is easiest.
3. Scope Written scope and price Material, layout, every planned opening, the permit and who patches what, on paper before work is booked.
4. The work Permit, new lines, pressure test The permit is filed, new lines are run while the old ones still serve, fixtures are switched over and the system is pressure tested.
5. Sign-off Inspection, then patching The city inspector signs off with the pipe still visible. Then the openings are closed.

## What this work looks like

Open sidewalk meter box with a new valve and copper line leaving toward the house

New copper water service line in sand bedding at the bottom of a narrow front-yard trench

New copper service entering a San Francisco garage wall with a main ball valve and pressure reducing valve

Removed lengths of rusted galvanized water service pipe on a tarp beside a trench

## Water service line replacement questions

### Who owns the water meter and meter box in San Francisco?

SFPUC does, along with the pipe from the water main to the meter. Only SFPUC field staff may open or operate the meter. The owner's part starts at the meter box and runs to the building, and the owner is responsible for maintaining and replacing it. To shut off water in an emergency, use the building's main valve rather than the meter.

### Can a galvanized service line be replaced with PEX?

Sometimes. PEX is approved for building supply in California, and PEX buried in soil must be sleeved. But where the old metal line serves as the building's grounding electrode, the plumbing code requires the replacement to be of like material, so copper is used unless an electrician provides another electrode. The first visit checks which applies.

### Can the service line be replaced without digging up the front steps?

Sometimes. A new line can sometimes be pulled or bored along a new path so that only the ends are dug out, or routed around steps, a driveway or a garage slab rather than under them. Soil, the length of the run and what is in the way decide what is possible, and the scope should say what gets dug and what gets restored.

### Is a Public Works permit needed to replace a San Francisco service line?

Only if the work opens the public sidewalk or roadway. Then a San Francisco Public Works excavation permit is needed, about $802 for a small project, alongside the DBI plumbing permit. Where the trench stays on private property between the meter box and the building, the DBI permit covers it: $290 on its own, or part of an $809 permit with an interior repipe.

### How much does it cost to replace a water service line in San Francisco?

A national budgeting range for a typical customer-side line is $2,000 to $6,000, and long runs, trenchless work or concrete and stair restoration run higher. San Francisco adds the DBI permit, $290 on its own or $809 as part of a repipe with underground work, and about $802 for a small Public Works excavation permit if the sidewalk is opened.

## Related services

### Whole-house repiping

Every hot and cold supply line from the main valve to each fixture, in PEX or copper, tested and inspected.

Whole-house repiping

### Galvanized pipe replacement

Old threaded steel supply pipe replaced with PEX or copper, with listed transitions, a flush for loosened rust and a city inspection.

Galvanized pipe replacement

### Water leak detection

Hidden supply leaks located by isolation and testing, so the wall that gets opened is the right one.

Water leak detection