North Metro Plumbing
“His pricing was fair, he quickly and professionally installed the toilet, pointed out an issue that I'll need to take care of in the future, but didn't 'pressure' me to get it fixed immediately.”
Best Drain Cleaning Services in Thornton, CO
24 contractors listed · 9 in Thornton · 12 open 24/7 · 18 open weekends · 22 rated 4.5+
Data verified October 28, 2026
Royal Services
“I called Royal Services Plumbing to see if they could come out and take a look at the leak and they were able to send someone out that same day who identified the leak and fixed it for under $600.”
Jim Needham Heating Cooling Plumbing and Drain
“They took their time to diagnose the issue, make a recommendation that was well explained to me, and were incredibly personable, courteous and professional!”
To the T Plumbing & Heating
“There was a $75 trip fee, which at first did feel like too much money to have someone tell me the pump is old and needs replacing soon, but now I have a great company I will work with again so it paid off.”
Amazing Plumbing Solutions LLC
“They ended each day by ensuring that they cleaned up after themselves and at the end of the project did their best to make our home look like it did when they first began working.”
Steadfast Plumbing
“(Rough drain line in wall was higher than the disposal outlet, did not allow gravity flow) Steadfast came out one day after calling them at 7:00 on the dot as scheduled.”
The 24 companies listed for Thornton, CO clear blocked drains and sewer lines. Hours, jetting and camera work, and free estimate claims come from each company's own website. Ask who carries their own jetter rather than subcontracting it before you book.
Area overview: Thornton, CO
9 of the 24 contractors we list are based in Thornton; the other 15 serve Thornton from towns including Denver (11 mi), Arvada (13 mi) and Commerce City (7 mi). The contractors on this page are rated from 4.1 to 5.0 across 13,831 reviews; 20 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (92%), quality (85%) and responsiveness (85%). 12 are open around the clock; 18 are open on Saturdays and 15 on Sundays. The services the contractors on this page list most often on their websites are drain cleaning (6), water heaters (5), sewer repair (3), emergency plumbing (2) and hydro jetting (2). 8 show a license on their websites; 2 list staff certifications (NATE) and 12 have a BBB rating of A or A+. Domain records put 14 websites of the contractors on this page at ten or more years old; the oldest dates from 1999. 13 offer emergency call-outs; 12 offer financing or payment plans; 8 give free estimates; 9 are family- or locally-owned and 15 list coupons or special offers. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
What can I learn from these companies' websites?
A website is linked by 22 of the 24 listings for Thornton. Look for two things: whether they own a jetter and a camera or hire them in, and whether they show repair work as well as cleaning. A company that only cables will keep coming back for the same line.
Plumbing Connect Systems LLC
“After doing some pricing comparison, which included some quotes from the bigger plumbing companies in the area, Antonio offered the most affordable and comprehensive water heater installation/replacement service.”
Jet Eye Drain Cleaning and Sewer Inspections
“Anthony was knowledgeable, respectful and great to work with, based on this experience I would DEFFINETELY recommend these guys to my friends and family.”
Royal Rooter & Drains
“(I'm no plumber) I ended up having them install a garbage disposal to eliminate the issue moving forward, however he was more than happy to leave it at clearing the blockage.”
Elite Plumbing Services
“Jim and Mike were very understanding of our needs, came out to house next day, assessed the situation and got our kitchen drain cleaned with tips on what to do to keep any further clogging.”
Mighty Plumbing and Heating LLC
“He also replaced and repaired parts missing from last years shutdown by the Cooler Company, and came back quickly to correct a float problem at no extra charge.”
Go Direct Services
“When the plumber redid a flat rate service because he was not satisfied with it (he was scoping my sewer line and mud obscured the camera at 100 feet out, so he pulled it back in, cleaned the lens, then did it again.”
Time Plumbing
“Had Joe Ruiz out with Time plumbing & heating, he repaired several GAS LEAKS, most of them under the sssmmmaaalll crawl space and while under there also, located & repaired a substantial water drain .”
Afford-a-Rooter Plumbing Services
“I dont like leaving bad reviews, but the communication with myself and company has been terrible, i asked for 2 main sewer lines to be cleaned rootered, told rep at company and it couldnt be communicated to service rep.”
Flatirons Plumbing
“Michael, the Flatiron plumber, arrived on time and after some discussion on what needed to be accomplished, set to work and quickly finished the task to satisfaction.”
My Denver Plumber
“From ease of scheduling an appointment, to communication before and during the appointment, do the friendliness of Jim and the people I spoke with on the phone, to the knowledgeability, to the care that Jim took with my home, to the reasonable cost o...”
Ultimate Heating
“We had Kyle and his team out because our furnish and air conditioner needed to be replaced, they were on time, very respectful, did a wonderful job, they even walked us through how to work it all.”
Plumb Pros Inc
“Had a great experience with Plumb Pros…we woke up to a kitchen sink full of water and no cold water after the weather dropped below -11, called several places including the bigger corporate plumbers, but because of the sudden deep freeze we had troub...”
Rooterguy Llc
“The faucet base gives a little when I turn the handle on (single) which I don't think is serious but I also don't know if it's because it's not tightened down enough or because the base is plastic.”
Payless Rooter
“He was thorough and knowledgeable in explaining to me what was wrong, what needed to be done, and then worked quickly to get things back up to snuff and thoroughly test everything once he was done.”
Squeaks Plumbing Heating & Air
“We will be calling Squeaks if anything else arises and we will definitely be asking for Islom again because we loved the work he did and his level of professionalism.”
Jd's Denver Plumbing
“Adam is a true professional, very knowledgeable quik and efficient, and friendly, keep this Man on and Give him a raise he deserves it , He is a Hard worker.”
A Better Plumber (An Absolute Plumbing Company)
“Beau came out and fixed a leak on an external faucet, he was on time and very professional, did great work didn't mind having to squeeze into a very weird little area to get to the pipe that we needed fixed and didn't complain about my dogs barking a...”
Service Experts Heating & Air Conditioning
“I've generally been skeptical of HVAC companies because I don't know enough about how the systems work to know when I am being tricked into purchasing products or services I do not actually need.”
Why these companies made our list
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