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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon3.4k+
    Verified french drain services reviews

Top-Rated French drain pros in Cornelius - Updated Nov 2026

Avatar for Masterworks Plumbing Co., LLC
Masterworks Plumbing Co., LLC
5.0(
36
)
Drain Clog or Blockage - Clear

Serving Cornelius, OR and surrounding areas

Approved

In business since 1996

Emergency services offered

Warranties offered

"First of all, we didn't wait long for Anton to return our call and he came to the house right away. We had a smell in the basement and a slow drain in the old 1940s concrete sink. He calmed our fears that it wasn't urgent but the old sink and plumbing needed replacing. It was easy to get scheduled. Anton and his son did a beautiful job putting in a new wash basin (double sink) and replacing all of the plumbing in a much tidier way than the original. They demolished the very heavy old sink and hauled that away for us, snaked the drain and put in proper plumbing/drain for the washing machine (it was just dumping into the old sink. These guys are extremely pleasant to have working in your home, very professional and kind. I'm so grateful we had them do this work. I feel like it was a fair price for the amount of work that was done. We we definitely use them again if the need arises."
4 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Realistic Rooter, LLC
Realistic Rooter, LLC
4.9(
109
)
Drain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For Business

Serving Cornelius, OR and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Anthony was professional in every way. He explained what he was going to do, looked carefully at my plumbing set up before he started and reassured me that although my house is old, the plumbing is still solid. He cleared the tub drain and I feel like I really accomplished something! So glad I was able to connect with a fine service provider."
New P-Trap
Old Ptrap
Response time3 hrs
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Sewer Renewal Specialists, LLC
Sewer Renewal Specialists, LLC
4.9(
56
)
Drain Clog or Blockage - ClearDrain Line Breakage - Camera Locate

Serving Cornelius, OR and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"We had our sewer line spot repaired due to root encroachment. This is an expensive repair, no matter what company you use. They gave us a competitive bid, got us on the schedule, and did the work as promised (showed up when agreed upon, left the area cleaned up, and sent us a photo/video of the work done)."
Before and After
Measuring and Mixing Epoxy
Installing Epoxy in Liner
Prepping liner for installation
Orangeburb pipe after photo

+7

Response time11 hrs
26 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Clear Flow Drains & Rooter, LLC
Clear Flow Drains & Rooter, LLC
5.0(
5
)
Drain Clog or Blockage - ClearDrain Line Breakage - Camera LocateDrain Clog or Blockage - Clear - For Business+1 more

Serving Cornelius, OR and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Clear Flow Drains & Rooter LLC is your trusted local expert for professional drain cleaning and sewer services throughout the Portland–Vancouver metro area. We are locally owned, licensed, bonded, and insured, providing reliable service at honest, affordable prices.\n\nOur services include:\n\nResidential drain cleaning starting at $199\n\nMain sewer line cleaning\n\nHydro-jetting\n\nSewer camera inspections\n\nKitchen, bathroom, and laundry drains\n\nCommercial drain cleaning\n\n24/7 emergency drain services\n\nWe take pride in quality workmanship, upfront pricing, and exceptional customer service. No unnecessary upselling, no hidden surprises—just dependable solutions to get your drains flowing again!\n\nClogs Don't Stand a Chance!\n\nCall (360) 360-8462 today for fast, professional service!

5 neighbors recently requested a quote
Avatar for Axiom PDX
Axiom PDX
4.6(
73
)
Drain Clog or Blockage - ClearDrain Line Breakage - Camera Locate

Serving Cornelius, OR and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Warranties offered

"They saved me $$$ thousands of dollars. These people are great. I had a clogged drain so I call plumber. The plumber that fixed my drain said I needed a new sewer main. So I got five different bids. Axiom PDX gave me bid which was less than the others but was honest enough to tell me a new sewer line was not necessary."
Muddy sewer repair!
root intrusion repair
New sewer install
Response time10 hrs
Response rate97%
237 neighbors recently requested a quote
Avatar for Mr. Rooter Plumbing
Mr. Rooter Plumbing
4.4(
97
)
Drain Clog or Blockage - ClearDrain Line Breakage - Camera Locate

Serving Cornelius, OR and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"I had a clogged drain that no amount of plunging could get rid of. I called several companies. I initially went with Mr Rooter because they were the only ones that could make it out that same day. Glad I did. The technician was very pleasant and he took his time to explain all the steps he was doing and let me watch as he put a camera down the drain and showed me on the screen where the clog was and all the build-up in the pipes. He then brought in a high pressure washer and I watched on the screen as he cleaned the pipes all the way down to where it joined up with the main sewer line. I initally thought the estimate was a little high, but not after watching all that they (his supervisor also showed up after an hour to help out) did."
Bathroom Plumbing
Bathroom Plumbing
Bathroom Plumbing
Bathroom Plumbing
Water Heater Installation

+36

2 neighbors recently requested a quote
Recommended by94%of homeowners
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French Drains FAQs, answered by experts

Most blockages can be cleared in 1-3 hours, but severe issues may take longer.

Yes, flushing a clogged toilet can make it overflow. While flushing the toilet may push enough pressure through the system to dislodge the clog, this is unlikely. Your best bet is to use a plunger and hope the suction can break up whatever is blocking the pipe. If this doesn’t work, use a plumbing auger or call a pro to help.

On average, a plumber will take 30 minutes to two hours to clear a clogged drain. If the clog is located close to the drain or an access point and isn’t severe, the project will take about half an hour. If the clog is deep within your plumbing system or is a severe blockage, it can take two or more hours to remove the clog. For this reason, main line clogs tend to take longer, usually between two and three hours.

Once you’ve poured the baking soda and vinegar into a drain, you should wait about 10 minutes for the mixture to break down the clog. If you try the baking soda and vinegar method and it doesn't work, you can do it again or try the baking soda and salt trick.

Anything from debris, rust, ice, and even poor installation can cause clogs in your plumbing vents. Some signs of a clog include slow drains, gurgling sounds in drains and toilets, and bad odors. The bad odors are the most concerning, as these can include methane and hydrogen sulfide. Contact a plumber to come take a look if you notice any of these signs.

The Cornelius, OR homeowners’ guide to french drain services

From average costs to expert advice, get all the answers you need to get your job done.