Top-rated sewer main install, replace or repairers.

Get matched with top sewer main install, replace or repairers in Unionville, MD

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Top-Rated Sewer main install, replace or repairers in Unionville - Updated Nov 2026

Avatar for Mahon Plumbing
Mahon Plumbing
4.6(
199
)
Sewer Main - Install, Replace or Repair

Serving Unionville, MD and surrounding areas

Approved

In business since 1994

Emergency services offered

Warranties offered

"Recently used Mahon Plumbing for various plumbing needs around my house. As a new homeowner you can be skeptical on what’s behind your walls or in this case pipes. Mahon did an initial sewer line inspection and called them back to swap out toilets and install natural gas in my backyard for a grill and fire table. They were professional, honest, and extremely knowledgeable about all phases of my projects. I would recommend Mahon Plumbing for all of your plumbing needs!"
Tankless water heater installation
Tankless Water Heater Installation
Commercial drain cleaning
Sewer Line Video Inspection
Water heater replacement

+30

Response time7 hrs
Response rate100%
Recommended by92%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Sewer Main - Install, Replace or Repair

Serving Unionville, MD and surrounding areas

In business since 1971

Credit card accepted

"AHS is ok. They cover repairs of most everything under the roof of your house. The companies that contract with them are not always the best. You call AHS with the issue, they send a fax to the repair company and give you the contact info. If they don't contact you within 24 hours, you call them. Sometimes they answer, sometimes they don't. When they arrive (usually three days or so later), they service the item. if it has issues within the 90 days, you call AHS again, they are sent out with no charge. If the serviceman decides the unit is unrepairable, AHS will allow you to choose a replacement from their listing (usually not as good as what you have) they will install and remove your old item, or give you wholesale amount to buy and install your own. Prices vary on what you want covered and what you want the copay to be, plus where you live. For me it is 49.99 per month with a 75.00 time of service order. You can have more than one item serviced at the same time under the same fee. If you have a SEAR product the repair guys are great. Not that wild about the other ones they send out. But it is a big savings compared to calling someone on your own. The cost of service is only the 75.00 copay."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Recommended by65%of homeowners
Avatar for My Air Duct Pro
My Air Duct Pro
3.5(
289
)
Sewer Main - Install, Replace or Repair

Serving Unionville, MD and surrounding areas

In business since 2005

Free estimates

Emergency services offered

"The service went okay. They recommended some repairs to fix leaks around the chimney. I paid a couple hundred extra to have the repair made. Two technicians came out for the job. I had no problem scheduling the deal."
Do You Have Dust in Your Ducts
-
-
Recommended by58%of homeowners
Avatar for Loveco LLC
Loveco LLC
5.0(
2
)
Sewer Main - Install, Replace or Repair

Serving Unionville, MD and surrounding areas

In business since 2011

Free estimates

Emergency services offered

"Heavy drain cleaning machines were taken down my basement including a little camera. They carefully vacuumed out all the water on the the floor and inserted more than 200ft of drain cleaning cable into the main drain, and in less than 45minutes i was all cleared. Same company  steam-cleaned my carpet in march. I will use them again and again."
Recommended by100%of homeowners
G.E. Mandley Plumbing, Inc.
5.0(
1
)
Sewer Main - Install, Replace or Repair

Serving Unionville, MD and surrounding areas

In business since 1987

Free estimates

"Great response time. Very affordable! family owned and operated. im going to use this company for every plumbing & gas needs for now on. The owner george knows how to troubleshot and this family owned company can get the job done no matter how big or small it is. and there more then willing to come out at your convenience. The father and son combine to make a great company. o and by the way they love to joke and have a good time with you while they work. And believe me they work and i bet whatever they fix you will never have another promblem with it again. HIRE THESE GUYS AND ENJOY A COMPANY THAT WILL NEVER LET YOU DOWN AND WILL ALWAYS THERE"
Recommended by100%of homeowners
Showing 1-10 of 20
FAQs for sewer main install, replace or repair projects in Unionville, MD

Most trenchless sewer line replacements can be completed within one to three days, though this varies based on your situation. Simple repairs on accessible lines might be finished in hours, while complex systems or challenging soil conditions could extend the timeline. The reduced excavation requirements result in faster completion compared to traditional trenching methods.

Trenchless pipe lining may reduce the interior diameter of your pipes, which could affect flow capacity in already narrow lines. This method also requires the existing pipe to maintain sufficient structural integrity to support the new liner. Severely collapsed sections, major joint separations, or completely misaligned pipes might not be suitable candidates for lining and could require alternative approaches.

Trenchless sewer pipe liners are rated to last up to 50 years when properly installed and maintained. Actual longevity depends on installation quality, usage patterns, and environmental factors like soil movement or tree root intrusion. Regular maintenance and avoiding problematic disposal practices (like flushing non-biodegradable items) can help maximize your system's operational lifespan.

Trenchless technology availability varies by region, with greater accessibility in metropolitan and suburban areas where specialized contractors operate. Some rural locations may have limited access to trenchless equipment and expertise. Local regulations and soil conditions also influence availability. A professional assessment of your property and local contractor options will determine if trenchless methods are feasible for your specific location.

Professional video inspection provides the most reliable assessment of whether your sewer issues suit trenchless repair. Generally, pipes with moderate damage, like small cracks, minor leaks, or partial blockages, respond well to trenchless techniques. Completely collapsed sections, severe misalignments, or extensive structural failures might require traditional excavation. Consulting with contractors who offer both methods ensures you receive unbiased recommendations.

Quality trenchless sewer replacement often includes a workmanship guarantee from the contractor. The specific terms vary by company and region, but many professionals stand behind their installation for at least one year. Material warranties may extend longer, depending on the pipe products used. Always request written warranty information before hiring, and understand exactly what's covered and what might void your protection.

The Unionville, MD homeowners’ guide to sewer main install, replace or repairs

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