Sewer line repair in San Jose

Why San Jose sewer lines fail the way they do

Most older San Jose houses were built between 1950 and 1975, when the orchards in Willow Glen, Cambrian Park, Blossom Valley and Santa Clara were being turned into ranch homes and Eichler tracts. The lateral under those houses is almost always one of three things: vitrified clay pipe in short sections with mortared joints, cast iron that has spent sixty years rusting from the inside, or Orangeburg — tar-impregnated wood fiber that was sold as pipe until the early 1970s and is now soft enough to cut with a knife.

Clay is the big one. It doesn't rot, but every joint is a gap, and the coast redwoods and live oaks that were planted as saplings when the tract went in are now fifty feet tall and thirsty. Six months without rain sends roots straight to the one wet spot in the yard. Add the earthquakes — Loma Prieta in 1989 and the steady small ones off the Hayward and Calaveras faults — and a joint that was slightly open in 1980 is offset by an inch today.

Eichlers and other slab homes in the Fairglen tract and along the Los Gatos border carry a second problem: the cast iron drains run under the slab, next to the radiant-heat tubing. When they fail you can't just dig a trench in the yard.

Sewer line repair in San Jose: the options

Sewer line repair — the spot fix. One collapsed section, one root-packed joint, one belly at the property line. A contractor cuts out the bad length and replaces it, usually for $1,500–$4,000, when the rest of the line is worth keeping. Spot repairs are covered on the repair page.

Sewer line replacement — when the camera shows problems every few feet, replacing the whole run is cheaper than three spot repairs over five years. Open-trench where the line is shallow and in the yard; trenchless almost everywhere else. See sewer line replacement.

Trenchless repair — cured-in-place lining and pipe bursting. Two access pits instead of a trench across the lawn, the driveway and the city sidewalk. In San Jose it's the default, not the upgrade, because Bay Area labor and the cost of street work make open-trench digging in the right-of-way brutally expensive. The trenchless page explains which method fits which pipe.

Camera inspection — $250–$500, and the only honest way to quote sewer work. Ask for the recording. See sewer camera inspection.

Hydro jetting and drain cleaning — clearing roots and grease at 3,500 psi so the camera can see the pipe wall, and as a maintenance step for lines that aren't ready for replacement yet. See hydro jetting.

Areas this guide covers

All of San Jose — Willow Glen, Rose Garden, Naglee Park, Cambrian, Almaden, Blossom Valley, Berryessa, Alum Rock and Evergreen — plus Santa Clara, Sunnyvale, Campbell, Cupertino, Milpitas, Mountain View, Morgan Hill and the hill towns. Area codes 408 and 669.

Neighboring cities don't always split lateral responsibility the way San Jose does. For sewer line repair, Santa Clara homeowners should ask the City of Santa Clara where their part of the line ends before comparing quotes. For sewer repair, Sunnyvale homeowners can put the same question to the City of Sunnyvale. For sewer repair, Milpitas homeowners should check with the City of Milpitas. The Milpitas sewer line guide explains how the city splits the line. Los Gatos and Saratoga have their own pages because the lots there are big, the trees are bigger, and the laterals are long: Los Gatos and Saratoga.

The lateral is yours, all the way to the main

In San Jose the property owner is responsible for the sewer lateral from the house to the connection at the city main, including the section under the sidewalk and street — confirm for your address with the City of San Jose. The city maintains the main. That surprises a lot of people who assumed the part under the pavement belonged to someone else, and it changes the math on repair versus replacement — which is why the ownership post is the post to read first. Lateral replacement or lining normally needs a plumbing permit and an inspection before backfill, plus a separate permit for any work in the sidewalk or street. Check with the City of San Jose, and make sure the contractor pulls the permit in their own name.

What to do right now if it's backing up

Stop running water. Don't flush. If sewage is coming up in a tub or shower, that's the lowest fixture in the house and it means the main line is blocked, not that drain. Say it's an active backup when you call; if neighbors have the same problem, call San Jose 311 too — after a big storm the city main may be surcharged. Sewer backup in San Jose walks through what the symptoms mean.