Drain cleaning & sewer clearing in California

In much of California, recurring main-line backups trace to tree roots entering aging clay or cast-iron laterals at leaky joints, where they catch grease and waste until flow stops. A camera inspection pinpoints the intrusion, while a cabling machine cuts the roots and hydro jetting scours the pipe walls clean; recurring intrusion usually signals the joint or pipe needs repair or lining. Homeowners with fixtures below the next upstream sewer manhole should also verify a working backwater valve to guard against sewage backflow during surcharge events.

Sources: LA County Public Works - Sewer Homeowner Responsibilities · California Plumbing Code 2022, Chapter 7 Sanitary Drainage (UpCodes) · CSLB - C-36 Plumbing Contractor Classification · LA County Sanitation Districts - Backup (Backwater) Valves

Across California, drain and sewer work is governed by these statewide rules under the state plumbing code:

• Permit

  Snaking or jetting an existing drain is routine clearing and does not require a permit. Repairing or replacing buried sewer/building-sewer pipe is altering drainage piping and requires a plumbing permit from the local city or county building department.

  Repair/replace only
• Cleanout access

  Under the California Plumbing Code (Chapter 7), each horizontal drainage run requires a cleanout at its upper terminal and at every 100 feet of developed length, plus an added cleanout for aggregate direction changes exceeding 135 degrees; cleanouts must open in the direction of flow and be accessible, typically near the building drain/building sewer connection.

  Required
• Licensed contractor

  Drain and sewer plumbing work for compensation generally requires a licensed contractor (C-36 Plumbing classification), licensed by the Contractors State License Board (CSLB).

  State-licensed plumber
• Lateral ownership

  As a general rule the homeowner owns and maintains the sewer lateral from the house to the public main, often including the portion within the public right-of-way, though some California agencies maintain the lower or entire lateral, so local rules should be confirmed.

  Homeowner to the main
• Backwater valve

  California Plumbing Code Section 710 requires fixtures installed below the elevation of the next upstream manhole cover of the serving sewer to be protected by an approved backwater valve; fixtures above that level must not discharge through the valve, and the valve must remain accessible for inspection.

  Check local code

Sources: LA County Public Works - Sewer Homeowner Responsibilities · California Plumbing Code 2022, Chapter 7 Sanitary Drainage (UpCodes) · CSLB - C-36 Plumbing Contractor Classification · LA County Sanitation Districts - Backup (Backwater) Valves