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Top-Rated Water main install, replace or repairers in Frederick - Updated Nov 2026

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

Serving Frederick, MD and surrounding areas

Approved

In business since 1994

Emergency services offered

Warranties offered

"It went amazing. Paid the extra bucks for emergency service, because of our smallish waterfall, looking leak, sprouting from a bathroom pipe, enough to puddle water onto our basement/laundry room floor. Initially, spoke to Chris, who was pleasant and upfront with the per hour fees, for emergency services. He sent us Tim, who was hesitant at first, due to the location of the leak, but his experience and knowledge, enabled him to decipher the location of our leak and fix it. A quick trip to Lowes, where he promptly returned and in 90 minutes, the job was done. A week later and the valve is bone dry. Yay!!!"
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 Atlantic Blue Water Services
Atlantic Blue Water Services
4.8(
124
)
Water Main - Install, Replace or Repair

Serving Frederick, MD and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"Not sure if these guys are plummers or surgeons. Team repaired a broken water service line into the house within 24 hrs. Managed to spare landscaping and dig minimally - only at the curb to make the connection. Very professional and skilled team. Best plummers we've worked with in >20 years of home ownership."
The Fleet
The Building on Rt. 140
Main water line replacement!
Well Pump Replacement
Training Session!

+22

Response time10 hrs
Response rate88%
67 neighbors recently requested a quote
Avatar for Douglas & Son Services
Douglas & Son Services
4.6(
24
)
Water Main - Install, Replace or Repair

Serving Frederick, MD and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"We had an back up in our outside basement stair drain that required emergency service. Douglas Plumbing responded the same day and were able to quickly correct the problem. The tech was professional and knowledgeable. We would definitely use then again!"
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+6

Response time11 hrs
Response rate100%
1 neighbors recently requested a quote
Avatar for Family Plumbing Services LLC
Family Plumbing Services LLC
4.4(
19
)
Water Main - Install, Replace or Repair

Serving Frederick, MD and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"My water heater started leaking on a Sunday. I reached out to Family Fire Service and they responded immediately. They had a new water heater out to my house the next day and installed in a few hours. The supervisor and the tech worked seamlessly to have us up and running. They provided quality service and at a very competitive price. I highly recommend Family Fire Service and Plumbing. KC"
WH Replace
Sewer Repair
Battery Back Up
Camera Inspection
Clogged Sewer Snake

+1

Response time6 hrs
Response rate92%
195 neighbors recently requested a quote
Markool Heating & Cooling, LLC
4.7(
18
)
Water Main - Install, Replace or Repair

Serving Frederick, MD and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"Professional and efficient. Chris did an A/C repair on a part under warranty from another company. He quickly coordinated getting the new part through the warranty and completed the repair quickly. Will recommend to others."
Response time1 day
16 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Orbit Water Solutions
Orbit Water Solutions
4.8(
44
)
Water Main - Install, Replace or Repair

Serving Frederick, MD and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"We could not be happier with the Puronics Hydronex iGen Whole home treatment system and Micromax 7000 drinking water system provided by Orbit Water Solutions. Justin, the marketing rep who sold us the system, was very professional and accommodating. Justin took about an hour to demonstrate a series of tests which reflected to quality of our water which had more chlorine and hardness than we expected. If you have concerns for lead, Orbit standard demonstration does test for it so you will need to have a separate test done. After some negotiation, we were able to settle on a deal which got us the system and financing for the next 10 years. Orbit provides annual maintenance services on the machine and there is a lifetime warranty on parts which really assured us we were making an investment to improve our water. The best part about it is that the system travels with you. For a small fee, Orbit will pack the system up and ship it to your next home if you move which was a big selling point for us. Orbit also threw in a subscription to PureSelects soap for the next 10 years which was a nice add-on. PureSelects provides every kind of soap or cleaning product you could ask for so it will be nice not to have to purchase additional soap products in the near future. Within a couple days, the installation team came out to install the system. They arrived on time but the installation took a little bit longer than expected. Turns out our the installed garbage disposal was too large to fit with the RO unit tank under the sink. Orbit was very accommodating though. Orbit purchased a new garbage disposal and installed it free of charge which I bet many companies would not have done. I highly recommend getting the larger of the under sink tanks for the RO unit. Even with the two gallon tank, my family has used up all the water in the tank. A 1 gallon tank would just not have been enough. The water in our house has been incredible since we installed the system a few months ago. We noticed an immediate impact to our skin and hair after using it and our drinking water certainly tastes better. Best of all, we feel confident in the quality of the water we use throughout the house to keep us safe and our appliances in good condition. We highly recommend the investment in the water treatment systems through Orbit."
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+9

Recommended by97%of homeowners
Avatar for Miracle Method
Miracle Method
4.5(
174
)
Water Main - Install, Replace or Repair

Serving Frederick, MD and surrounding areas

In business since 1979

Free estimates

Credit card accepted

"Miracle Method did a great job resurfacing the floor, the bathtub and surround, and the shower and surround. Everything looks new. They even cleaned our existing shower doors to look new. They removed the toilets to resurface the floor and placed new wax rings when they replaced the toilets. The only negative part of the resurfacing process was the smell of the chemicals they use. We had to open a lot of windows to vent the odor."
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+20

Recommended by87%of homeowners
American Home Contractors Inc
4.7(
2,134
)
Water Main - Install, Replace or Repair

Serving Frederick, MD and surrounding areas

In business since 1986

Free estimates

Emergency services offered

"American Home Contractors performed roof repairs for me and they were absolutely fantastic!!! We recently moved into our home. At the time of purchase, there were water stains on one of the upstairs bedroom ceilings, however, the home inspector did not note any problems with the roof. After a number of rain storms, it appeared as if the water marks were becoming darker and more prominent. After one particularly bad storm, I used a ladder to touch the ceiling and discovered that it was wet. I called a well known roofing company (not American Home Contractors) to get an estimate on repairs. After that company came out, we were advised that one of the boot seals had degraded and that we needed it replaced. (The agent who came to the house also gave us the hard sell to replace our entire roof.) I was e-mailed the repair estimate which was over $500 to replace a boot seal!! I declined to have that company perform the work on our roof and started looking for another roofing company. Enter American Home Contractors. I received a mailer from American Home Contractors which advertised repairs of boot seals for $149. I called the company to double check that the advertised cost was accurate and I was told that it was. I scheduled an appointment with them and waited to see what would happen. The day before the appointment I was provided an appointment reminder as well as the name of the technician who would be coming to the house. On the date of the appointment, I received a phone call from the tech, Paul Cox, notifying me that he was running ahead of schedule and checking to see if he could arrive at my home a bit early. Wonderful! Paul arrived early and got to work surveying the roof. He did not give me the hard sell to replace my entire roof. He was candid about issues with my roof but did not press me to undertake any additional repairs. He performed the repairs right then and there and even went above and beyond to perform some additional repairs that we did not schedule at no additional cost. Based on my experience with Paul, I felt that Paul was honest, trustworthy, hardworking and dependable. American Home Contractors will definitely be earning my business again. I cannot recommend them enough!!!"
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GAF Decotech – Westminster, MD

+509

Recommended by95%of homeowners
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FAQs for water main install, replace or repair projects in Frederick, MD

Most standard homeowners' policies don’t cover water main line replacement costs because this project is considered wear and tear, not sudden damage. Check your declarations page for exclusions and talk with your agent about add-on service-line coverage if you want help footing the bill for your water main line replacement costs.

Yes—hire a licensed plumber any time the job taps into a city-owned line or local codes. Professional plumbers carry the right permits, tools, and insurance, and they know how to avoid costly mistakes that could flood your yard or trigger fines. Pros can also provide expert recommendations on the type of system and materials that will work best for your situation, and they can guide you on best practices for ongoing maintenance.

The Frederick, MD homeowners’ guide to water main install, replace or repairs

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