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

Avatar for Fred and Son Plumbing
Fred and Son Plumbing
4.8(
68
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved

In business since 1990

Free estimates

Customers say: True professional

"The cracked pipe ended up being between the first and second floor where drain pipes from the upstairs bathrooms came together in a Y-joint. The house is 45 years old and these old plastic pipes eventually crack from flexing, etc. which is exactly what had happened. Fred had to cut 10 inch wide strips in the drywall in the kitchen and bathrooms walls and ceilings to get at the area to replace the leak. He added some rubber sleeves to the new Y-joints to allow for some flexing of the house so this would not happen in the future. When all was done, the repair was $2300 and I had to hire a drywall contractor for another $500 to fix the drywall, but Fred was upfront about the price, the extent of the damage that would have to be done for the repair, and the need to fix the drywall after he left. While it really stinks to have to cough up almost $3K to for a leaking pipe, that's the cost of owning a home build in the 1970's with cheap materials and I was very impressed with the work done by Fred and his same day responsiveness. At least the leak was noticed right away so we did not have any water or mold damage to deal with."
Recommended by100%of homeowners
Avatar for The Waterline Group, LLC
The Waterline Group, LLC
4.5(
428
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Credit card accepted

"Had a leak in main water line. Collected estimates and methods in replacing the water line. I am glad I found The Water Line Group on the web in researching best methods to replace house main water line. After calling The Water Line Group, Geary came the same day to review best method to replace the main water line. What I liked about his estimate it included two methods with no extra cost and very reasonable compared to other estimates. Work schedule was set up less than a week. I was impressed by the crew led my Jamie. They successfully did the trenchless method from the original connection to the water meter with no disturbance to house,front porch, tree, scrubs and driveway. They have the pull water pipe method down to a high success rate. I highly recommend The Water Line Group."
Response time5 hrs
Recommended by90%of homeowners
Joseph plumbing & drain
4.9(
162
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"Kap did a great job all around. I originally had him come out to assess why the water heater wasn't working (no hot water). He determined that the unit (15 years old) needed to be replaced. He also pointed out that the system is not up to code and some extra work would be required. I asked if he would be able to do the new install and asked if he could do it sooner than later, as cold showers for days (even one more) would not be fun. He ended up coming back out same day - about 6pm - with all parts and the new unit. He stayed until 11pm! to get the job done. Kap is fantastic. He's knowledgeable, professional, and very nice person. Highly recommend."
Response time6 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Remedy Plumbing and Drain Cleaning
Remedy Plumbing and Drain Cleaning
4.8(
78
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"I called Remedy at 7:30am to request a new toilet installation, and they were able to get it done the same day at a very reasonable price. The technician took his shoes off before entering the house and kept his mask on the entire time. He was professional and courteous, as was the office personnel I spoke with. They removed the old toilet, installed the new toilet, processed the paperwork, and disposed of the old toilet, all in less than an hour. I would highly recommend Remedy Plumbing and will certainly use them again if needed."
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9 neighbors recently requested a quote
Recommended by76%of homeowners
Avatar for DAY & NIGHT PLUMBER LLC
DAY & NIGHT PLUMBER LLC
4.8(
93
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Marin the tech was great he was friendly and took his time to explain what happen with my water heater and how I could prevent the problem from happening again. I would differently ask for him again to service my water heater. Thank you Marin!!!"
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+1

Response time11 hrs
5 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Atlantic Blue Water Services
Atlantic Blue Water Services
4.8(
124
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"On time, in fact earlier than expected. Courteous technicians. Provided options for repair or replacement and was forthcoming about what he saw. Recommended a highly reviewed water heater. All around excellent."
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 Roto-Rooter Plumbing & Water Cleanup - Baltimore
Roto-Rooter Plumbing & Water Cleanup - Baltimore
4.2(
662
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved (Corporate)

In business since 1935

Free estimates

Emergency services offered

When you need an emergency plumber in Baltimore, MD or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

Roto Rooter- Baltimore
Roto Rooter- Baltimore
Roto Rooter- Baltimore
Roto Rooter- Baltimore
Roto Rooter- Baltimore

+6

Recommended by80%of homeowners
Avatar for Mr. Rooter of Maryland
Mr. Rooter of Maryland
4.3(
1,100
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved

In business since 1968

Free estimates

Emergency services offered

"Mr. Rooter came out to perform the replacement of a main water line inside that has been leakkng. The technician's team were professional as they setup and prepared to perform the work inside as well as cleaned and removed debris from the construction."
Mr. Rooter of Baltimore fleet
Response time50 mins
17 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Len The Plumber Heating & Air, LLC
Len The Plumber Heating & Air, LLC
3.9(
674
)
Water Main - Install, Replace or Repair

Serving Rockville, MD and surrounding areas

Approved (Corporate)

In business since 1996

Emergency services offered

Credit card accepted

"Great -- the plumber arrived within an hour or two of my husband calling and was able to locate the leak and repair it. He also found and repaired an additional issue that we did not even know we had (an attachment to our hot water heater that regulates water pressure needed replacement)."
Additional Photos
Response time11 hrs
Response rate100%
7 neighbors recently requested a quote
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FAQs for water main install, replace or repair projects in Rockville, 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 Rockville, 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.