Plumber in Torrance, CA

Torrance Sewer Lines

Who Is Responsible for a Torrance Sewer Lateral?

The property owner, along its whole length and at the main. The city’s sewer lateral policy describes the lateral as the underground pipe linking a property’s plumbing to the city sewer in the street, starting roughly 12 inches outside the building and running to the public main, and it makes the owner responsible for maintaining and repairing all of it, the connection to the main included. The city’s Sewer System Management Plan puts both the upper and the lower lateral on private owners. The municipal code draws the line in the same place, defining the house connection sewer as the piping that begins 12 inches from the building’s outside wall and ends at its connection with the public sewer.

Beyond that connection, the pipe is the city’s. Torrance maintains its own sewers: the Public Works wastewater program looks after 287 miles of city-owned sewer line and nine lift stations. Torrance is not among the cities Los Angeles County lists for its Consolidated Sewer Maintenance District, and the county’s service locator names the City of Torrance as the sewer maintenance contact. From the city’s mains the flow passes into trunk sewers of the Los Angeles County Sanitation Districts, which list Torrance in their District No. 5 and in their South Bay Cities district, and it is treated at the A.K. Warren Water Resource Facility, the plant formerly called the Joint Water Pollution Control Plant. The city’s General Plan is frank about the age of its own system, naming downtown as one area where Public Works has been repairing sewers in place by slipping a plastic liner inside them.

Permits for Lateral Work

• From the house to the property line. A plumbing permit, which the city’s lateral page calls “Alter Building Sewer,” issued through Community Development. Torrance’s amendment to the plumbing code lists the materials allowed for a building sewer from two feet outside the building, among them cast iron, vitrified clay, schedule 40 ABS or PVC, and PVC SDR 35. The sewer chapter of the municipal code calls for a cleanout where the house sewer meets the soil pipe at the building and at every change in alignment or grade.

• From the property line to the main. A Construction and Excavation permit from the city’s engineering permits office. Its application lists Class A, C-34 or C-42 as the license classes for sewer lateral and main work, wants a certificate of insurance before the permit is issued and an Underground Service Alert number before any excavation, and asks for two working days’ notice to book an inspection. Trench backfill and pavement repair follow the city’s own standard, and the engineering fee schedule has a line for installing a sewer liner.

• Both permits when the work falls on both sides of the property line.

Here is how a Torrance job runs. We clear laterals here all the way out to the city main. Repairs go in trenchless whenever the pipe allows it, and we dig only when nothing else will do. When a repair reaches the stretch beyond the property line, we handle that part as well, under the city’s Construction and Excavation permit, and a job that crosses the line goes ahead under both permits.

No Lateral Inspection Required at a Sale

A search of the municipal code and the city’s sewer management plan turns up no Torrance rule calling for a lateral inspection when a property is sold or remodeled. The city’s own advice for anyone with a sewer problem is to have a licensed plumber run a camera through the lateral before repairing it. Buyers who want a record of the line before closing can book our buyer’s sewer camera inspection, which comes with the video and a written summary. The complimentary look we give after clearing a main line is a live view only, with no recording.

If Sewage Comes Up in a Torrance House

• Stop running water. Every fixture drains into the same lateral, so each flush or load of laundry adds to the backup.

• Check the street. Sewage spilling from a manhole or along the gutter points to a city main. During business hours, call Public Works at (310) 781-6900. At other times the city’s sewer plan routes overflow reports through the Fire Department at (310) 781-7042, and its sewer crews are on call around the clock.

• Street running, house backing up? Then the blockage is most likely in your lateral, and that is our call. We open the line from the cleanout. With no cleanout, we go in through the roof vent or by pulling a toilet, and once the line flows we can add a cleanout for next time.

Torrance Water

Who Supplies Water in Torrance?

Most addresses get their water from Torrance Municipal Water, the city’s own utility in the Public Works Department, which says it covers 78 percent of the city and about 105,000 residents and business customers. The rest of the city is served by California Water Service, or Cal Water, through its Rancho Dominguez District, and Cal Water describes two of that district’s systems, Dominguez and Hermosa-Redondo, as serving portions of Torrance. On the city’s 2025 map of water providers, Cal Water’s areas lie along the western side of the city and in its southwest corner by the Hollywood Riviera, with one small patch belonging to a neighboring city’s water department. A map cannot settle every street, so the name on your water bill is the one to go by.

Torrance Municipal Water’s report for 2025 says 68 percent of its supply was imported water bought from the Metropolitan Water District of Southern California, from the Colorado River and Northern California, and the other 32 percent came from three wells in the West Coast Groundwater Basin and a groundwater desalination project. Cal Water’s reports for both systems describe a blend of local groundwater and water bought from the same wholesaler, and in the Hermosa-Redondo system Cal Water also treats its well water to bring down dissolved solids from seawater intrusion.

How Hard Is the Water in Torrance?

That depends on your supplier, and only one of them publishes a figure. Torrance Municipal Water’s 2025 report has no hardness reading, so we make no claim about it. Cal Water’s 2025 reports list total hardness for the groundwater each system pumps, averaging 126 parts per million in the Dominguez system and 502 in the Hermosa-Redondo system, beside the figures for the treatment plants that supply its imported water. On Cal Water’s own scale, water is hard from 150 to 300 parts per million and very hard at 300 or more, and the utility notes that hard water can lead to mineral buildup in pipes and water heaters. For the water at your own tap, ask your supplier.

Leaks, Meters and the House Valve

Cal Water takes care of the system up to the meter, and owners are responsible for repairs to the plumbing on their side of it. Its service rules have the customer provide a main valve on the piping between the service connection and the house, and it explains a simple check for a hidden outdoor leak: close the house valve, find the meter at the curb, and if the flow indicator is still turning, water is escaping between the two. Under the city’s water conservation ordinance, now at Level 1, a leak the city notifies you about has to be fixed within seven days. If your shutoff is seized, buried or missing, we replace it with a working emergency shutoff valve so you can stop the water yourself next time.

To report a break in the street or a leak on the utility’s side of the meter, call your supplier. Torrance Municipal Water takes calls at (310) 781-6900, and the city’s provider map gives (310) 781-7042 for after-hours emergencies. Cal Water’s Rancho Dominguez District answers at (310) 257-1400, day and night.

Additional Information

Torrance plumbing permits: where do they come from, and can I pull my own?

From the Building and Safety Division of the Community Development Department. The Permit Center is at 3031 Torrance Boulevard, (310) 618-5910, and since January 5, 2026 every permit application and set of plans goes in electronically through the city’s Citizen Access Portal. Plumbing takes its own permit, separate from building and electrical, and the division’s answers to common questions list the plumbing permit as the one for pipes, fixtures, water heaters and sewer work. The code exempts clearing a stoppage and stopping a leak without replacing pipe, valves or fixtures, but replacing a defective concealed pipe counts as new work and needs a permit. We can pull the permit for you, or, if the house is your primary residence, you can pull it yourself as an owner-builder. The city’s owner-builder declaration has you state that you or your own wage employees will do the work and that the structure is not intended or offered for sale, and if it is sold within a year of completion, the burden falls on you to show it was not improved for sale.

Is an earthquake gas valve required in Torrance?

Not by the city, as far as its code shows. A search of the Torrance Municipal Code, current through June 2026, finds no requirement for a seismic or excess flow gas shutoff valve, and the city’s seismic retrofit program deals with the structure of buildings, not their gas lines. If you want one anyway, or an insurer asks for it, SoCalGas says the valve has to go on your house line, since a California Public Utilities Commission decision has barred earthquake valves on its own equipment since 2002, and SoCalGas will not install one for you. The valves we fit are the motion type, and the gas piping around them is covered on our Torrance gas line page.

What does Torrance change in the state plumbing code?

The city has adopted the 2025 California Plumbing Code with a handful of local amendments. Besides the sewer materials rule above, ABS and PVC drain, waste and vent piping above ground is allowed only in residential construction, and horizontal wet venting in bathrooms is not permitted.

Call Rooter & Plumbing Masters in Torrance

Our crews and office speak English and Spanish, and the company is veteran-owned. A toilet that gurgles when the washer drains, a cleanout cap that keeps overflowing, a meter that turns with every tap closed: each one is cheaper to deal with now than after the pipe fails.

Call (888) 855-6680 day or night for a free estimate at your Torrance home, rental or business.