Note to readers: This post was updated on July 16, 2026 to update the comparison between hydro jetting and traditional snaking with current guidance and add links to our sewer maintenance resources. We refreshed the details below so the advice reflects how we approach this work today.
Plumbing emergencies don’t wait for a good time. A backed-up sewer line at 2 a.m. or over a holiday weekend is expensive and stressful, and the damage to flooring, drywall, and personal property adds up fast if it isn’t caught early. The good news is that most sewer backups are preventable with the right maintenance, and the right method for the job.
Two ways to clear a sewer line
There are two main approaches to clearing a clogged sewer line: traditional cable (snaking) and hydro jetting.
Traditional snaking uses a motorized cable with a cutting head to chew through roots and break up blockages. It’s effective, fast, and less expensive, which makes it the right call for common clogs like toilet paper, hair, and typical soft blockages.
Hydro jetting uses a trailer-mounted machine that pushes water through the line at up to 4,000 PSI and 13-20 gallons per minute. Instead of just punching a hole through a blockage, it blasts the entire diameter of the pipe clean, stripping grease, sludge, and root hair from the pipe walls. Think of the difference this way: snaking through a grease-clogged line is like poking a hole through jello. You get flow back, but the grease is still coating the pipe and the clog returns quickly. Hydro jetting actually removes it.
When hydro jetting is worth the extra cost
- Heavy grease buildup, common in kitchens and multi-unit buildings
- Recurring clogs in the same section of pipe
- Root intrusion in older cast iron sewer lines
- Preventive maintenance on a line that’s never been jetted
When snaking is the right call
- A single, isolated clog from toilet paper, wipes, or hair
- Smaller-diameter lines where jetting equipment isn’t practical
- Budget-conscious routine maintenance with no history of grease or root problems
Preventing the 2 a.m. emergency
Older cast iron sewer lines, common throughout Pasadena, Arcadia, and the rest of the San Gabriel Valley, are especially prone to root intrusion and grease buildup over time. The fix isn’t complicated: get the main line cleaned at least once a year, and use a sewer video camera inspection to actually see the condition of the pipe rather than guessing. Never pour grease, oils, or coffee grounds down a drain, and don’t rely on your garbage disposal as a substitute for a trash can. For homes with a history of root problems, read up on how tree roots invade sewer lines in the San Gabriel Valley.
When to call a pro
If your sewer line backs up more than once a year, or you notice slow drains in multiple fixtures at once, that’s a sign of a main line issue, not a fixture-level clog. Ask any company you hire whether they use hydro jetting and whether they’ll run a camera afterward to confirm the line is actually clear. For more on whether it’s the right fit for your situation, see does hydro jetting really help and our tips for maintaining your drainage system after hydrojetting.
