London Plumbing
“These guys are in my trusted trades lists for any client jobs or my own emergencies.”
Best Drain Cleaning Services in London, ON
21 contractors listed · all 21 in London · 7 open 24/7 · 13 open weekends · 13 rated 4.5+
Data verified October 21, 2026
Discount Drain
“Called them about a clog I had and within 1 hour they had fixed the problem.”
Plumbhouse Plumbing
“With a deadline looming Estevan and Brayden went so far as to come in after their family's Thanksgiving dinner and stay into the morning to ensure my family had a home to move into.”
U Need A Plumber
“Had some urgent plumbing issues with my bathroom, John was able to come over to my house right away!”
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Triton Home Service
“Dylan came out to install a new water heater and a gas shut off valve for my gas line.”
Ashworth Drainage
“Great team of guys who helped us out in our time of need.”
The 21 companies listed for London, ON clear blocked drains and sewer lines. Hours, jetting and camera work, and free estimate claims come from each company's own website. Ask whether the crew that arrives owns the camera, since that decides what you learn.
Area overview: London, ON
All 21 contractors we list here are in London itself. The contractors on this page are rated from 4.1 to 5.0 across 1,740 reviews; 8 have 50 or more reviews and 13 are rated 4.5 or higher. The topics that come up most in reviews of the contractors on this page are "price" and "communication". 7 are open around the clock; 13 are open on Saturdays and 7 on Sundays. 3 show a licence on their websites. Domain records put 5 websites of the contractors on this page at ten or more years old; the oldest dates from 2004. 7 offer emergency call-outs; 2 offer financing or payment plans; 2 give free estimates; 4 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 20 of the contractors on this page; 16 publish a contact page; 11 list a public email and 4 take bookings online. We count these figures across the contractors on this page; hours and prices change, so confirm the details with the contractor before you book.
Are any of the listed drain crews available overnight?
Overnight availability is claimed by 7 of the 21 listings here. A backup that has reached a finished basement floor is worth the night rate, because standing sewage is a health problem rather than an inconvenience. A slow sink is not. Ask what the after-hours charge covers before agreeing.
Plumbing For Life
“They were detailed in their explanation and all three of them had a good attitude and working relationship with each other.”
The Water Guys
“Replaced our old water service pipe (lead) with an updated one using trenchless technology.”
Household Plumbing
“I have been a repeat customer of Household Plumbing and have been impressed every time with the excellent customer service in store and staff that come out to complete the work.”
Sobek Plumbing
“Huge thank you to Rick for being so quick to help with a solution and to the gentleman that came out to help!”
Viridity Incorporated
“We want to thank the Viridity Incorporated crew consisting of Justin, Anthony and Keith who have been working on our backyard, for assisting us in the stopping the flow of water in our basement on Monday July 15th.”
Mike Pope Plumbing & Heating
“Great service, friendly, personable, fast, efficient, reliable, need I say more, I have seen them in action with everything from a toilet running to all out super floods, during and after hour service from one guy to three....”
Iron Horse Plumbing
“So thankful for you guys coming out over the holidays to fix a leaky toilet!”
Choice
“It is clear that they care about their customers, and if I was in the area I'd hire him without a second thought.”
Practical Plumbing Co Ltd
“They took care to be gentle with our things and completed the job efficiently and properly, and explained thoroughly to make sure we understood and got on the same page.”
Corner Gas Plumbing & Home Renovations
“Prior to the work our basement would flood every time it rained, now it's dry as a bone and useable.”
London Drain Service
“They had to small window between rain days and were able to do it just before it started to rain again.”
Brouwer Plumbing and Heating
“Love the team at Brouwer pumbing from the owner Paul , Brenda and Garry at the front office to the guys on the field.”
KRM International Trading Group
“Very professional and helpful, they help me with my basement carpit find solutions quickly.”
Hessey Bros Plumbing
“Ryan came out and fixed our leaking toilet on short notice, he was incredibly nice and went above and beyond.”
Limestone Concrete Ltd
“They did a very good driveway and are professional.”
Why these companies made our list
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