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

Avatar for AquaFlow Plumbing Heating & Water Systems
AquaFlow Plumbing Heating & Water Systems
5.0(
10
)
Water Main - Install, Replace or Repair

Serving Islip, NY and surrounding areas

Approved

In business since 2020

Free estimates

Small jobs welcome

"I moved into my new home on 7/8 and knew I needed to replace the 20 year old hot water heater. The water was warm in the shower and brown. Originally, I planned on getting a tankless unit, but that was prohibitively expensive and not allowed in my community. Taking the next prudent steps, I secured my three estimates. Not only was AquaFlow the least expensive, but when I met Enrique, I knew I wanted to work with him on this project and all future plumbing issues. He explained what needed to be done, secured the tank from the supply dealer, and showed up at 9:00 AM promptly as promised. It was originally planned to be a two man job, but the other person couldn’t make it. Enrique did the entire job on his own. I was amazed. He worked until 5:00 PM. I asked why he didn’t just reschedule with me, but he stuck to the date and time he gave me. He also installed my new touch-less faucet and adjusted the cartridge in the shower and I now can take hot (not warm) showers."
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+5

2 neighbors recently requested a quote
A&M Plumbing & Heating
4.8(
13
)
Water Main - Install, Replace or Repair

Serving Islip, NY and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

We are a locally owned and operated business committed to providing exceptional service, quality workmanship, and honest communication on every project we undertake. Our experienced team takes pride in delivering customized solutions tailored specifically to meet each client's unique needs. We value integrity and reliability, ensuring every job is completed to your satisfaction. Our goal is to build lasting relationships with our customers through consistency, professionalism, and outstanding results. Let us show you why homeowners continually choose us as their trusted service provider.

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 Islip, 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%
Avatar for 247 Services
247 Services
5.0(
4
)
Water Main - Install, Replace or Repair

Serving Islip, NY and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"We had John do our plumbing job. He was excellent. We had a hose that was attached to the outside of our house, that would not come off. We had several people try to take it off, no use. He was able to take it off without breaking the pipe. If i need a plumber again would definitely ask for him."
Bathroom
1 neighbors recently requested a quote
Avatar for 1-800-Plumber + Air of Babylon
1-800-Plumber + Air of Babylon
5.0(
14
)
Water Main - Install, Replace or Repair

Serving Islip, NY and surrounding areas

In business since 2024

Free estimates

Credit card accepted

"The entire team was great! They arrived quick, looked at the damage and gave an estimate. Got the job done QUICK! Highly recommended! I’ll definitely book again if I have any plumbing issue."
Oil fired Boiler
Oil fired Boiler
Oil fired Boiler
Beckett oil burner
Beckett oil burner

+4

Response time30 mins
Recommended by45%of homeowners
Avatar for APV Mechanical Inc
APV Mechanical Inc
4.8(
89
)
Water Main - Install, Replace or Repair

Serving Islip, NY and surrounding areas

In business since 2005

Free estimates

Credit card accepted

"

Very well, had the worker by name of John, worked very hard, especially carrying out old tank, was by himself, very impressed, on how hard he worked and his efficiency in doing so. Never slowed down.


This was the second time, I had called the company, it seems everything was happening all at once, I

received prompt attention.   Anthony   always returned my phone calls, and inspected the problem.  Anthony, the owner respects a customer (which is hard to find in our day)


It is a pleasure to do business with a company that returns your calls promptly and tries to do their best in giving you service.  I always look for honesty in a company, and believe that is what I received.  John is a very polite worker, and you have the feeling of trust with Anthony and John.

"
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+2

Recommended by91%of homeowners
Avatar for Rapid Repairs - Plumbing and Handyman
Rapid Repairs - Plumbing and Handyman
4.4(
53
)
Water Main - Install, Replace or Repair

Serving Islip, NY and surrounding areas

In business since 2012

Emergency services offered

"While looking for a plumber to inspect and replace a leaking water heater, I found Rapid Repairs.  I called the number, and was directed to send a text message if I needed a emergent response.  After only a few minutes, I got a response in a text message addressing my issue.  They were professional and answered my questions as best he could without being at my house.  I even got estimates based on my answers.  The only reason I did not utilize their service was that I needed hot water immediately, and they were already on multiple service calls, meaning the earliest they could come out would be Monday.  
I would definitely use them in the future, I was very happy with the response and appreciated that he was polite and understood that I couldn't wait for them to become available.
"
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+2

Recommended by88%of homeowners
Avatar for Clearway Plumbing & Heating
Clearway Plumbing & Heating
4.6(
181
)
Water Main - Install, Replace or Repair

Serving Islip, NY and surrounding areas

In business since 1997

Free estimates

Emergency services offered

"Job went very well. Called and left voicemail for Jim on a Sunday. He immediately called back. Came next day on Monday morning to evaluate job. Returned in afternoon with Paul and Adam who did the work. They were very professional, very clean and efficient. Very pleased and would definitely use them again."
Recommended by92%of homeowners
Avatar for Rubber Duck Plumbing Inc.
Rubber Duck Plumbing Inc.
4.5(
268
)
Water Main - Install, Replace or Repair

Serving Islip, NY and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"John and Ian came to fix my tub hot water leak within 1/2 hr. of me calling Home Advisor. They replaced the shower body at my request instead of a temporary repair. They did an excellent job and were so professional in an emergency situation. I would definitely use them again and recommend them as well."
Rubber Duck plumbing
Response time1 day
Recommended by94%of homeowners
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FAQs for water main install, replace or repair projects in Islip, 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 Islip, 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.