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

Avatar for Mayjac Plumbing, Inc.
Mayjac Plumbing, Inc.
4.6(
15
)
Water Main - Install, Replace or Repair

Serving Smithtown, NY and surrounding areas

Approved

In business since 2015

Small jobs welcome

Offers commercial services

"For years I have wanted to update my very old and inefficient American Standard cast iron boiler. I was very fortunate to find Mr Joe Burriesci the owner of Mayjac Plumbing who took the time to evaluate the best options, since the old boiler handled two apartments. We collectively decided to go with two Navien Combi Condensing Boilers, but the best part of the entire process was how meticulous the installation was done. From start to finish Mayjac Plumbing kept every promise and timeline made. I highly recommend Mayjac Plumbing..."
Before Installations
After installations
Whole House PVC Piping 7
Whole House PVC Piping 6
Whole House PVC Piping 5

+16

Response time10 hrs
2 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Abstract Plumbing, Heating and A/C
Abstract Plumbing, Heating and A/C
4.5(
40
)
Water Main - Install, Replace or Repair

Serving Smithtown, NY and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Reliable, Professional, expeditious, courteous. Owner called me back and came immediately on a Saturday. identified the problem quickly (water detected water in pan. Reset sensor, cleared drain and removed water."
Response time3 hrs
7 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Red Lion 24/7 Emergency Plumbing Heating & Drains
Red Lion 24/7 Emergency Plumbing Heating & Drains
4.6(
10
)
Water Main - Install, Replace or Repair

Serving Smithtown, NY and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Hands down best contractor we have ever worked with and highly recommend. Anthony was honest and determined to repair our horrible plumbing that we have had problems with for years. At 61 years of age I know excellence and integrity and Anthony has both in loads. He is a master plumber and his work ethic far exceeded our expectations. Red Lion provided excellent expert service at a fair price and we are grateful to have e found them."
Whole House Water Filter
Water Heater Replacement
Water Heater Replacement
Response time2 hrs
Response rate100%
1 neighbors recently requested a quote
Avatar for 8995 Sewer Drain
8995 Sewer Drain
4.3(
11
)
Water Main - Install, Replace or Repair

Serving Smithtown, NY and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

"I had a water main break at my house. It needed to be taken care of immediately. I found 8995 Sewer Drain through the Angi service. Carl came to the house the same day, looked the work over and gave me an excellent price. He was there the next morning working the job at 7:30am. Knocked it out in no time. Very happy with his workmanship, promptness and pricing. Would definitely use Carl and 8995 again!!!!"
Response time10 mins
Response rate93%
Recommended by87%of homeowners
Tri Seasonal Plumbing, Inc.
New to Angi
Water Main - Install, Replace or Repair

Serving Smithtown, NY and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. \n

Avatar for APV Mechanical Inc
APV Mechanical Inc
4.8(
89
)
Water Main - Install, Replace or Repair

Serving Smithtown, NY and surrounding areas

In business since 2005

Free estimates

Credit card accepted

"APV Mechanical got onto the roof of my business and checked the a?c compressor and discovered that the "main" circuit breaker required replacing. They also checked the breaker panel breaker and found it to be functioning correctly. They then went to the air handler and discovered that the thermostat was not sending the necessary signal to the air handler. They repaired the problem and the a/c  is functioning as it should.
I will definitely use them again should the need arise.
"
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+2

Recommended by91%of homeowners
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FAQs for water main install, replace or repair projects in Smithtown, NY

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 Smithtown, NY 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.