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4 services · Los Angeles

Drains & sewer in Los Angeles, CA

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
Plumber working on the drain pipes under a sink

Drains & sewer services in Los Angeles

Local conditions

Drains & sewer in Los Angeles: what's different

Older Los Angeles homes have cast-iron or clay drains, and cracked cast iron under raised floors and root-filled clay laterals are common findings on a camera inspection. Earthquakes and decades of soil movement can also offset joints.

LA Sanitation handles sewer service, and the homeowner is typically responsible for the lateral to the main. Many repairs are done trenchless to avoid digging through mature landscaping and hardscape.

Water and sewer in Los Angeles
The Los Angeles Department of Water and Power (LADWP) supplies water; LA Sanitation handles sewer service.
Permits in Los Angeles
Plumbing permits are issued by the Los Angeles Department of Building and Safety (LADBS).

Los Angeles housing and plumbing

Craftsman bungalows and Spanish revival homes from the 1910s–1940s are common in neighborhoods like Highland Park and Mid-City, many on raised foundations with plumbing in a crawl space.

Other Los Angeles conditions that affect plumbing

  • Galvanized and cast-iron pipe: Corroded galvanized supply and cracked cast-iron drains are the most common reasons for repiping and drain replacement.
  • Earthquake readiness: California requires water heaters to be strapped against earthquakes, and flexible gas connectors reduce break risk.
  • Hard water: Southern California water is hard, so scale builds up in heaters and fixtures.
  • Water conservation rules: LADWP enforces watering-day limits during droughts, so leaking irrigation valves, running toilets and slab leaks show up quickly on bills. Many owners also switch to WaterSense fixtures, which California requires for new toilets and faucets sold.

Neighborhoods and ZIP codes

Plumbers on Thawline cover Los Angeles and Los Angeles County, including Silver Lake, Highland Park, Mid-City, Westchester, Studio City, Eagle Rock. ZIP codes: 90001 · 90002 · 90003 · 90004 · 90005 · 90006.

When to call a plumber in Los Angeles

  • 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 Los Angeles

Why does my older LA home keep getting drain clogs?

Cracked cast-iron drains catch debris, and roots get into old clay laterals. A camera inspection shows which it is and whether cleaning, a liner or replacement is the right fix.

Are chemical drain cleaners safe to use?

They can damage older pipes and fixtures, and they make the job hazardous for the plumber if they don't work. A plunger or a drain snake is safer for a single slow drain.

More plumbing in Los Angeles

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