Sewer Line Location Service — Los Angeles & the Valleys

Know Exactly Where Your Sewer Line Runs Before Anyone Digs.

Electronic line locating from a licensed, family-owned LA plumber since 1997. We map the exact path and depth of your sewer lateral and mark it on the ground — so repairs are targeted and projects don’t hit it by surprise.

Licensed CA #1067555
Bonded & Insured
Since 1997
5.0 ★ (300+ ratings)

CALL (626) 956-3708 request service

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Book a Sewer Line Locate — Confirmed Within 1 Hour

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🔒No obligation. Confirmed within one hour. Never shared.

Who needs this

Planning a project — pool, addition, ADU, foundation, landscaping, tree removal

Nobody knows where the line runs — no plans, or the plans are wrong

Facing a sewer repair — locate the defect so we dig once, in the right spot

Buying a property — pair with a camera inspection

Contractors who need the line marked before excavation

Roots suspected — find where the line passes under mature trees

Guessing is expensive. Locating is cheap.

CALL (626) 956-3708 REQUEST SERVICE

Why LA-area lines are so often a mystery

Across LA’s older neighborhoods, sewer laterals were installed decades ago — often before the current house, the current landscaping, or the current owner. Additions get built over them, driveways get poured across them, and the city’s plans (when they exist) don’t always match what’s in the ground.

On hillside lots in La Crescenta, Tujunga, Montrose, and La Cañada, depth and grade add another variable — the line may run far deeper than anyone expects. We combine a transmitting sonde run through the line with a surface receiver to trace the exact route and depth, then mark it on the ground. That single step is what turns a destructive exploratory dig into a precise, minimal one — and it’s what lets us recommend trenchless repair with confidence.

What you get

The exact route of your lateral, marked on the surface

Sewer line path marked on the ground

The depth at key points

Know how deep the line is

Notes you can hand a contractor

Clear details for your contractor

Optional camera inspection at the same visit

See inside the sewer line

A targeted repair plan if we find a defect

Know exactly what needs fixing

Ready to locate your line?

Call (626) 956-3708 or book your sewer line locate.

CALL (626) 956-3708

How it works

Call/request online

Confirmed within one hour.

We run the sonde and trace from the surface

Then mark the path and depth.

You get the map

If there’s a problem, honest options and a written price.

CALL (626) 956-3708

professional sewer repair by Advantage Plumbing & Rooter

Cost

Line locating is a low flat rate — and it’s usually the cheapest insurance on the entire job, because it prevents an exploratory dig in the wrong place or a contractor’s excavator finding your lateral the hard way. Often bundled with a camera inspection; ask when you call.

Why LA chooses Advantage Plumbing & Rooter

24/7 real people

Written prices up front

Licensed CA #1067555

Family-owned since 1997

Hillside/deep-line experience

Workmanship guarantee

CALL (626) 956-3708

Service area

Pasadena

La Crescenta

La Cañada

Tujunga

Montrose

Glendale

Altadena

San Marino

See all service areas →

Rated 5.0 ★ across 300+ reviews

    
 
 
      Posted on Google  
   
   Richard Pepper 
 9 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Amazing technicians, knowledgeable, incredible Office help
  
 
     Posted on Google  
   
   Bill Tom 
 8 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Always professional. Thanks Albert and Warren.
  
 
     Posted on Google  
   
   Alberto De Diego 
 8 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Frank with Advantage Plumbing is really excellent.  He’s been out to our house in South Pasadena a few times.  He’s always on time, can come on short notice when needed, and is super professional and capable.  Always gets things fixed quickly at a fair and reasonable rate.  He’s also a super nice guy.  Always asks about our dog, for example, who’s been having medical issues lately!  Class act.
  
 
     Posted on Google  
   
   Angelo Incardona 
 7 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Frank (the plumber) did a great job installing our tankless water heater. It was a tough job under the blazing heat conditions.
  
 
     Posted on Google  
   
   Michele Hamburger 
 3 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Simply the best. I was able to reach someone at 10pm on Friday night and they arrived at 6am Saturday and fixed my water heater in 30 min.  Trustworthy and skilled, highly recommend
  
 
     Posted on Google  
   
   Ann Kochakji 
 3 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. We've hired Advantage Plumbers for three jobs so far and are very happy with their work. Their prices are reasonable and the plumbers go out of their way to make sure the job is done right. They make suggestions when needed which is helpful and even pick up parts when necessary. We would especially like to acknowledge Victor and his assistant for fixing the leak in our outdoor pipes.
  
 
     Posted on Google  
   
   Mihran Asatourian 
 2 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Great company. Called them for a leak under kitchen sink (cat stood on pipe and the weight separated the connections). They offered to send someone same-day, but I opted for next morning instead. I love that they use a one hour appointment window, instead of 3-5 hours like other companies. Technician, Victor, arrived right on time, explained the issue to me and pointed out a couple other problems, fixed everything and tested everything thoroughly before leaving. I told him about the cat and he made sure to "cat proof" the connections. Like I said, great company, don't hesitate to use them.
  
 
     Posted on Google  
   
   Mark J 
 1 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Frank has done work at my properties for ages. He's always been congenial, forthright, and honest with me, even erring on the side of caution when necessary because he knows that doing a job right is the utmost importance.
  
 
     Posted on Google  
   
   Abira Ali 
 1 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. We had Advantage plumber Frank come over to flush our tankless hot water system. He was very efficient, friendly and got everything done and operating- no fuss- no muss- so nice to have hot water. Thanks Frank!
  
 
     Posted on Google  
   
   Andrew Sanesi 
 30 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. The Best! Period
  
 
     Posted on Google  
   
   Annie Alwin 
 28 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Love Steve and the Advantage team. Day or night, they get the job done. So glad they are my plumbers. They always get it done right, are friendly, courteous and so knowledgeable!
  
 
     Posted on Google  
   
   Daniel Haas 
 26 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Advantage Plumbing repiped my entire crawl space, including the main line under my house and the lateral line in my front yard, this past week. I interviewed six companies before choosing them, and from the first visit through project completion, the experience was exceptional.

They gave me a fair, respectable quote, and the work was fully permitted (Advantage pulled the permit at a modest cost). Even the city inspector said, "Nice work!" The crew was punctual, courteous, hardworking, and clearly knowledgeable — top-notch in every way.

For the front yard line, they used pipe-bursting technology, so my yard didn't need to be dug up.  The new line will last 100 years. Every part of the job — proper strapping, quality materials, multiple cleanouts — was done to the highest standard. This was truly exceptional work, and I'm grateful for their dedication. Thank you to Steve, Johny, and the entire crew for a job so well done!

Separately, before the repiping project, I had Advantage come out to snake a clogged tub drain. They arrived the same day and did a great job. Alfonso and Jose were punctual, kind, friendly, and attentive — another job well done!
  
 
     Posted on Google  
   
   Grant McCullagh 
 25 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. We are very pleased with Steve’s  service, keep up the good work!!
  
 
     Posted on Google  
   
   Debbie Kurth 
 25 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. There are simply not enough complements I can give this team.

I had a water dripping on the street issue that ai could not figure out . When soap bubbles appeared, we realize the problem was the sewer .  Steve rearranged his team schedule to get the problem fixed and fast.

The pipe, on a hillside was scoped with a camera revealing  the severity of the 90 year old cast iron pipes.  A replacement was needed.  One can only shudder to think the cost of that.

Using new technology called pipe lining, not only was the pipe repaired from the inside out , they even managed to clean the pipe below the street, saving us thousands of dollars!! .  They even found a fresh water leak and were able to repair it while the pipe was exposed.  The entire job was done in a day.

I simply cannot sing high enough praises for Steve and his team.  Professional,  caring, on time with a fanatic work ethic. Steve truly cares about people and not just money .

Look no further when needing help with an unpleasant issue of plumbing.

UPDATE:
Had another leaking pipe problem. . Advantage sent Plummer Frank whose long experience in the field, quickly and easily fixed the problem.   Thank you!
  
 
     Posted on Google  
   
   Alexis Bradley 
 24 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Victor with Advantage Plumbing & Rooter was fantastic to work with. He quickly solved our water pressure issue, took the time to listen to our longer-term plumbing goals, and scheduled a follow-up to address everything else we need. We were thoroughly impressed by his expertise. Highly recommend!
  
 
     Posted on Google  
   
   Jeffrey Woldhuis 
 24 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Advantage Plumbing helped me out tremendously.  Their guy Frank is great.  I had an upstairs leak in a wall that he investigated and found the location of quickly without damaging too much of my wall.  I would highly recommend this company.
  
 
     Posted on Google  
   
   Shelby Button Cotten 
 23 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Frank came by to fix our clogged sinks and he was friendly, knowledgeable, and efficient. Can't ask for more from a plumber! I will be recommending to my neighbors.
  
 
     Posted on Google  
   
   Rachael Cottrell 
 23 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Jose came to service a dishwasher draining issue and he came with a happy and knowledgeable attitude. So grateful for honest service people, HIGHLY RECOMMEND Advantage!!!!
  
 
     Posted on Google  
   
   Casey R 
 23 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. I’m so glad we went with Advantage Plumbing for our water heater replacement. I expected the process to be a bit of a headache, but they made it surprisingly easy. They showed up right on time, were friendly and respectful, and completed the job without any unnecessary complications. The new water heater was installed efficiently, and everything was cleaned up and left in order. I really appreciated how easy they were to work with. I’d happily recommend Advantage Plumbing to friends and family and would definitely call them again.
  
 
     Posted on Google  
   
   Don Straney 
 21 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Fast, dependable, kept me informed.
  
 
 
  
 
 
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