Sewer Backup in Los Gatos or Saratoga? Who Fixes Which Part of the Line

When sewage comes up in the shower or every drain in the house slows down at once, one of the first questions homeowners ask us is: is this my problem, or the city’s? In Los Gatos and Saratoga the answer depends on which sanitation district serves your street and on one small fitting near the sidewalk that most people have never heard of.

Here is how it works, in plain terms, with a few examples from jobs we have done around town.

Which District Serves Your Home

Neither Los Gatos nor Saratoga runs its own sewer system. Two special districts do:

• West Valley Sanitation District serves Los Gatos, Monte Sereno, Campbell and about two-thirds of Saratoga, plus unincorporated areas between them.
• Cupertino Sanitary District serves most of Cupertino and about a third of Saratoga.

Some homes in the Saratoga hills are not on a public sewer at all and use private septic systems. If you are not sure which district you are in, your district’s service map or a call to their office will tell you.

The Fitting That Decides Who Pays: the Property-Line Cleanout

A cleanout is a capped pipe that comes up to ground level so the sewer line can be reached without pulling a toilet or digging. A property-line cleanout sits right at the edge of your lot, where your private line meets the public right-of-way.

Both districts tie their responsibility to that fitting. West Valley Sanitation says that when a property-line cleanout exists, the district will inspect and clear stoppages in the lower lateral between the cleanout and its main, at no additional charge, because it is included in your sewer service charge. Without one, the property owner is responsible for clearing the line all the way to the district’s main in the street. Cupertino Sanitary District works the same way: it maintains and repairs laterals within the public street provided there is an accessible and serviceable cleanout at the property line.

Many older homes in Los Gatos and Saratoga were built without one. That means a root ball under the sidewalk can become the homeowner’s bill, even though that section of pipe runs under public land.

What We See on Real Jobs

Saratoga: roots under the sidewalk, and no cleanout at the property line

Roots had grown into the joints of the clay section of this home’s sewer line, out toward the street. With no property-line cleanout, West Valley Sanitation does not service that section, so it fell to the homeowner. We worked from the cleanout by the house, ran a camera, hydro-flushed the line with a root-cutting nozzle and applied a foaming root treatment. We were also clear about the long-term picture: the lasting fix is replacing the worn cast iron near the house and adding a property-line cleanout, so the district handles the street side from then on.

Saratoga: the cleanout by the front door was full of water

Flushing a toilet sent sewage up into the bathtubs. The cleanout in the lawn by the front door was holding water, which told us the blockage was further out, in the line between the house and the street, not inside the house. We cleared it first, then ran a camera and showed the homeowners what was inside before talking about any repairs.

Campbell: a backflow valve doing more harm than good

A whole-house stoppage traced back to a sewer backflow valve in the front yard. Its flapper had caught debris, including wipes, and once we removed it the backup started to drain. West Valley Sanitation recommends checking the flap on these devices every three to six months, following the manufacturer’s schedule. A backflow valve only protects you if it can open and close freely.

Why We Start at the House

Russell has spent decades installing underground sewer and water lines, and his rule is simple: a plumber should work from a cleanout at the house, not dig into the district’s section of pipe. If a plumber goes into the lower lateral and gets equipment stuck or damages it, the plumber is on the hook for the cost. So when a home has no cleanout, the first step is usually to add one at the house, clear the line and run a camera. Then you can make an informed decision, including whether a property-line cleanout makes sense.

Adding a Property-Line Cleanout

In the West Valley district, a property-line cleanout needs a district permit. The owner has to locate the property line first, and the work gets two district inspections, including a camera inspection of the line, plus a sign-off from the local building inspector. The district lays out the steps here. It involves digging near the sidewalk, so it is not a small job, but once it is in, future stoppages on the street side of the line are the district’s to clear.

What to Do During a Sewer Backup

1. Stop running water. Every flush or load of laundry adds to what is backing up.
2. Look for a cleanout outside. If you have a property-line cleanout and you are in the West Valley district, the district asks you to call them first during business hours. Their crew checks the main and the lower lateral.
3. If the problem is on your side, or you have no cleanout, call a plumber. We will find the cleanout, or tell you if there is not one, clear the line and run a camera so you can see what caused it. More on that on our sewer backup page.

Questions About Your Sewer Line?

Simply Green Plumbing has been working on sewer lines in Los Gatos, Saratoga, Monte Sereno and Campbell since 1988. If you are not sure whether you have a property-line cleanout, or which part of your line is yours, call us at (408) 358-6446. We will take a look and give you a straight answer. You can also read more about our sewer repair and trenchless sewer replacement work, or our pages for Los Gatos and Saratoga.