Drain cleaning in Pasadena

Pasadena Now, reporting on the City Engineer's January 2026 briefing, put the city's sewer system at about 328 miles, mostly vitrified clay, with most of it more than 90 years old. The pipe from your house to that main is yours to keep working, and Pasadena writes down what that involves, which sets it apart within the areas we cover.

This page covers where your responsibility starts and stops, what the city asks for before a repair or a liner, and what Pasadena's trees, water and rain do to a lateral.

Where does a Pasadena homeowner's sewer responsibility end?

It ends at the city main, which usually lies in the middle of the street. Under Pasadena Municipal Code 13.24.610 the owner keeps the "house sewer" in a safe and sanitary condition, and Public Works defines that pipe as starting 24 inches out from the building wall. So the part you pay for crosses your lot line, the parkway and half the street.

The city cleans and televises its own mains. When a blockage is in the city system, a whole neighborhood backs up at once, and the number to ring is the City Service Center at 626-744-7311. A single house backing up is nearly always the private pipe, which is where a main line drain cleaning visit starts.

Downstream, the city's mains drain into trunk sewers run by the Sanitation Districts of Los Angeles County, which carry the flow to a treatment plant outside the city.

What does 328 miles of old clay mean for the pipe at your house?

It means your lateral probably joins a main with hundreds of aging clay joints, and that roots and groundwater get in at those joints. Pasadena Now reports that most failures in the city system begin at joints, where roots push in and groundwater seeps through.

Pasadena Now reports that the city has awarded a contract to televise about 550,000 linear feet of main, roughly a third of the system, and that 30 to 40 miles of pipe have already been lined. None of that work reaches your lateral. A house built in the Craftsman era, the style Pasadena is known for, may still have its original clay or cast iron run to the street, and an old clay sewer pipe fails in predictable ways: offset joints, hairline cracks and root hairs working into every seam.

If your drain slows down every spring, signs of tree roots in a sewer line lists what to look for before you call anyone.

What permit does a sewer repair or liner need in Pasadena?

A Public Works permit, every time. The city's house sewer guidance says one is required for all sewer repairs, including a pipe liner, whether or not anyone digs in the parkway or street. The rule is written about repairs, so if you are unsure whether a job counts, ask Public Works before it starts.

Here is how the two trenchless options are treated, according to the city document at the time we checked:

Before either, the city wants a camera inspection that runs from the nearest private cleanout to the main, with the address, date and a distance counter on screen. Review takes 3 to 5 business days and carries a flat fee. The defects it names are heavy tuberculation in cast iron, root intrusion, offset joints, cracks and a damaged connection to the main. Our pages on sewer pipe lining and sewer camera inspection explain the work itself.

The municipal code also requires City Standards for the house sewer between the property line and the public sewer, so ask Public Works what a replacement of any part of that stretch has to meet.

Which Pasadena trees do the most damage underground?

The city's own list of species that are hard on sewers is long: poplar, willow, elm, ash, birch, sycamore, maple, cottonwood, Russian olive, apple, pear, lilac, honeysuckle and chokecherry. Public Works advises against planting any of them directly over or near a house sewer.

Pasadena also protects 13 native species once a trunk passes 8 inches across at 4.5 feet, and the list includes California sycamore (Platanus racemosa) and coast live oak. Under the city's tree ordinance, a protected tree cannot be removed or injured without a permit. If a root is the culprit, cutting it out of the pipe is a plumbing question, but digging a trench through its root zone is a tree question too, so ask the city before you commit to excavation.

How do Pasadena's housing mix, water and rain affect drains?

Pasadena has about 63,203 homes. Roughly one in four sits in a building of 20 or more units, and the typical home dates from 1961, so single bungalows and large apartment blocks share the same neighborhoods. In a multi-unit building, a blockage in the shared line backs up the lowest unit first, and the property manager usually decides who calls.

Pasadena Water and Power reported hardness between 202 and 256 parts per million in 2025, an average of about 13 grains per gallon, which counts as very hard. About half the supply is local Raymond Basin groundwater and the rest is imported. Scale does not cause most clogs, but it narrows pipes and holds onto soap and hair. In wet winters, groundwater can push into loose clay joints.

How do you book a drain job in Pasadena?

Send the address and describe what is happening. We'll arrange a local plumber, and you receive a written quote before any work starts. Say whether you own a house or a unit, where your cleanout is, and whether anyone has pulled a camera through the line before.

Use the price request form or go back to the home page for the full list of services.

Questions people ask

How much does drain cleaning cost in Pasadena?

Los Angeles area guides put a single sink or tub clog at about $100 to $300 and a main line at about $200 to $600, with jetting higher. Pasadena has no separate published price list, so these are ranges, not quotes. See drain cleaning cost for what moves the bill.

Does the City of Pasadena clear a blocked house sewer?

No. The city maintains mains only, and its guidance says the owner maintains the house sewer to the main. Call the City Service Center at 626-744-7311 if sewage rises from a manhole, because that points to the public line.

Can I connect a patio or roof drain to my sewer line in Pasadena?

No. The city says the municipal code makes it illegal to connect a patio drain, downspout, pool overflow or footing drain to a sanitary sewer, including your house sewer. Surface water may be directed toward the street or to a storm drain for a fee.

How often should a Pasadena house sewer be cleaned?

The city recommends having the house sewer cleaned and inspected once a year. That is the city's general advice for every property, and roots and grease are the causes it names. A camera visit after cleaning shows whether the pipe is sound or heading for repair.