San Jose, CA · Answering 24/7
Sewer backup in San Jose? We clear the main line at any hour
Sewage coming up through a tub, a shower or a floor drain, or a toilet that overflows when the washer drains. Stop running water anywhere in the house and call; the main line is blocked, and nothing will drain until it is cleared.
A sewer backup in San Jose means the main line from the house is blocked, so every fixture drains to the lowest opening, usually a tub, shower or floor drain. Stop using water, keep people away from the sewage, and call; we clear the line from a cleanout, then camera it to see why.
Warning signs
Warning signs before a full backup
- Gurgling toilets
Air pushed ahead of a slowing main.
- Several slow drains
The shared line is narrowing.
- Water in the shower after a flush
Early backflow at the lowest drain.
- Sewer smell indoors
Waste standing in the line, or a dry trap.
- Wet ground at the cleanout
A leaking or overflowing cleanout.
- Worse after rain
Rainwater getting into the line.
- Roots on past cables
Roots are still in the pipe.
What happens after you call
From sewage in the tub to drains running
- 1
Stop the water
Every fixture off.
- 2
Call
A dispatcher answers any hour.
- 3
Clear the main
From the cleanout toward the street.
- 4
Test
Every drain run clear.
- 5
Camera
Cause and location recorded.
- 6
Next step
Repair, jetting or a city report.
The job
Why sewage comes up where it does
Waste from every fixture shares one main line. When that line blocks, water from sinks, toilets and the washer backs up and exits at the lowest drain in the house, which is why the shower fills when a toilet flushes. Plunging does not help and can push sewage out faster; the blockage is usually well beyond the fixture.
Once the line is open and the camera has shown the cause, lasting fixes are covered on our sewer line repair and root-cutting hydro jetting pages.
Sewage in the tub or shower
A tub or shower is often the lowest drain in a single-story house, so it is where a blocked main shows first, usually with gray or brown water and a sewer smell. Stop all water use, including a dishwasher or washer that may be mid-cycle. Do not run the tub to rinse it. We clear the main from the outside cleanout where one exists, which keeps the equipment and the mess out of the house, then flush and check that every drain runs clear.
Toilet overflow from the main
A single toilet that overflows after one flush can be a clog in that toilet. A toilet that overflows while nobody used it, or when a sink or washer drains elsewhere, is the main line. The difference matters: plunging a toilet over a blocked main pushes sewage back up through the shower. Close the supply stop behind the toilet so it stops refilling, stop using water, and call. We clear the main, then pull the toilet only if the camera points to its drain.
Cleanout overflowing
An outdoor cleanout spilling sewage onto the yard means the blockage is downstream of it, between the cleanout and the city main. That narrows the search. We clear from that cleanout toward the street and camera the line to see whether the problem is on your side of the property line or the city's. Footage showing a blockage past your line is what the city needs for a service request. Homes without a cleanout can have one added through our cleanout installation work.
Backup after rain
A backup that only happens during or after heavy rain points to water getting into the sewer where it should not: through cracked laterals, loose cleanout caps, or downspouts and yard drains connected to the sewer, which codes do not allow. The extra flow overwhelms a line that copes in dry weather. We clear the immediate backup, then camera the lateral for cracks and check for connections sending rainwater into it. Sealing those openings is what stops the next storm from producing the same call.
Local context
Whose side of the line the backup is on
San Jose splits the sewer lateral at the property line: the homeowner owns the upper section from the house to that line, and the city is responsible from there to the main. During a backup, that split decides who pays for the fix. The camera pass after we clear the line records where the blockage or break sits, so you either book the repair or report the problem to the city with footage in hand.
DIY or a plumber
What to do right now, and what to avoid
Sewage carries bacteria, so the rule is simple: stop the flow, stay out of it, and let the line be cleared from outside.
| Situation | Do it yourself | Call us |
|---|---|---|
| Sewage rising in a drain | Stop all water use in the house | Clearing the main |
| Toilet overflowing | Close the stop behind the toilet | Plunging over a blocked main |
| Sewage on floors | Keep children and pets away | Cleanup of carpet and drywall |
| Washer or dishwasher running | Stop the cycle | Checking the machine's drain afterward |
| Drain cleaners | Do not pour them into standing sewage | A line that has chemicals in it |
Cost factors
What an emergency backup call costs depends on
Planning range, not a quote: $140 to $220 per hour for plumbers in Santa Clara County. Source: proplumbersanjose.com, 2026-07-26.
- Time of call Night and holiday calls are billed differently; you hear how first.
- Access An outside cleanout is faster than pulling a toilet.
- What caused it Roots and grease take more passes than paper.
- Camera Recommended after every backup.
- Repairs Broken pipe found on camera is quoted separately.
Every job is priced after we see it; any published range is for planning only.
FAQ
Sewer backup questions
It is usually the lowest drain on a blocked main line.
Not if other drains are backing up; it pushes sewage elsewhere.
In San Jose the upper lateral is yours; past the property line it is the city's.
Yes. We answer 24/7 and dispatch for backups.
If roots or a break caused it, yes, until that is fixed; the camera shows which.
We clear the line; sewage cleanup and drying are separate work.
Rainwater is getting into the sewer through cracks or connections.
Related work
Other Emergency & Leaks jobs we handle
Guide: Sewer backup: what to do first.
Sewage backing up in San Jose? Call now
Stop using water; a dispatcher answers at any hour.
Updated September 2026