4 services · San Antonio
Drains & sewer in San Antonio, TX
A single slow sink is usually a local clog a plumber can clear in one visit. Several drains backing up at once, gurgling toilets or water at a basement floor drain point to the main sewer line, which may need cleaning, a camera inspection and sometimes repair.
- Licensed local plumbers
- The problem explained before work starts
- Price agreed before the job begins
Drains & sewer services in San Antonio
Drain cleaning in San Antonio
UrgentIf one fixture is slow, the clog is usually in that fixture's branch line. If several drains back up at once, or the basement floor drain fills when you run the washer, the main sewer line is blocked and needs a larger cable or a jetter.
Hydro jetting
Hydro jetting cleans the full width of a drain pipe with high-pressure water, washing out grease, scale and fine roots that a cable only punches a hole through. It works best on sound pipe and is usually done after a camera inspection confirms the pipe can take it.
Sewer camera inspection
A sewer camera inspection runs a waterproof camera through the line from your house to the city main and records what it finds: roots, cracks, sags, offset joints or collapsed pipe. It's the best way to decide between cleaning, spot repair and replacement.
Sewer line repair
UrgentA damaged sewer line can be fixed with a spot repair, a trenchless liner, pipe bursting or an open-trench replacement. Which one fits depends on what the camera shows, how deep the pipe is, and what's on top of it, such as a driveway, trees or landscaping.
Local conditions
Drains & sewer in San Antonio: what's different
Older homes in historic districts like King William and Monte Vista have cast-iron and clay drains, while north-side slab construction uses PVC. Clay soil movement can crack drains under slabs across the city.
SAWS provides sewer service to most of the city, and the homeowner usually owns the lateral to the main. A camera inspection shows whether a recurring clog is buildup, roots or a broken pipe.
Mature trees in older central neighborhoods also send roots into clay laterals, which causes repeat backups.
- Water and sewer in San Antonio
- San Antonio Water System (SAWS) provides water and sewer service to most of the city.
- Permits in San Antonio
- Plumbing permits are issued by the City of San Antonio Development Services Department.
San Antonio housing and plumbing
Historic districts like King William and Monte Vista have century-old homes with cast-iron and galvanized pipe, while the north side is mostly newer slab construction.
Other San Antonio conditions that affect plumbing
- Very hard water: Scale buildup shortens tank water heater life and calls for regular flushing or descaling of tankless units.
- Slab leaks: Clay movement under slabs breaks hot and cold lines; warm spots on the floor are a common sign.
- Drought watering rules: SAWS seasonal watering rules make leaking irrigation valves and backflow devices worth fixing quickly.
- Winter Storm Uri: The February 2021 freeze burst pipes across San Antonio, where homes are built for heat and plumbing often runs through attics and exterior walls. Insulating vulnerable lines is a common follow-up.
Neighborhoods and ZIP codes
Plumbers on Thawline cover San Antonio and Bexar County, including Alamo Heights, Monte Vista, Stone Oak, King William, Medical Center, Southtown. ZIP codes: 78201 · 78202 · 78203 · 78204 · 78205 · 78206.
When to call a plumber in San Antonio
- Water backing up in the tub or shower when a toilet flushes
- Several fixtures draining slowly at the same time
- Water or sewage at a basement floor drain
- Gurgling from drains or toilets
- Sewer smell inside or a soggy patch in the yard
- The same clog returning within weeks of being cleared
How these problems start and how to choose between repair options is covered in the drains & sewer guide.
Drains & sewer questions in San Antonio
Who is responsible for my San Antonio sewer lateral?
Are chemical drain cleaners safe to use?
More plumbing in San Antonio
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