GNK plumbing services

Top Pro

Licensed

$75/service call

(waived if hired)

Select a service

Zip code

Pipe issues

Repair urgency

Flooding status

Responds in about 4 hours

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About

I'm a Master Plumber. I provide Quality and Perfection. That is my number one goal. I do the job correctly and professionally. I'm not the cheapest, but I am skilled at what I do. Notes : We charge a $100 service fee, but if GNK Plumbing is hired for the job the fee will be waived. Monday to Saturday from 8.00 Am to 6.00 Pm

Overview

Current Top Pro

Hired 306 times

4 similar jobs done near you

Background checked

License verified

2 employees

21 years in business

Business hours

This pro hasn't listed their business hours.

Payment methods

This pro accepts payments via Cash, Check, and Credit card.

Top Pro status

Top Pros are among the highest-rated, most popular professionals on Thumbtack.

2025

2024

2023

Credentials

License verified

Plumber – Master

License state: MA

Background checked

Passed by Jean Kossaifi on Jan 4, 2023.

Services offered

Pipe issues

Repair urgency

I work on non-urgent repairs

I work on urgent repairs

Flooding status

Yes

Projects and media

Reviews

Customers rated this pro highly for work quality, professionalism, and responsiveness.

Excellent 4.9

198 reviews

5

96%

4

0%

3

0%

2

2%

1

2%

Read reviews that mention:

Ranjit B.

2 days ago

•

Hired on Thumbtack

Jean at GNK plumbing was one of the best experiences I have had. Very reliable, professional, punctual, n reasonable. He quoted me a very fair price and even though the work ended up being more than he originally thought, he was very accommodating and did the job.

Details: Yes, repair is urgent • No, the building is not currently flooded • Leaking pipes • House

Plumbing Pipe Repair

Maria V.

1 month ago

•

Hired on Thumbtack

Details: No, repair is not urgent • No, the building is not currently flooded • Other pipe issue • Sink • House

Plumbing Pipe Repair

James D.

3 weeks ago

•

Hired on Thumbtack

Jean was at my house within 30 minutes and took care of my job for a great value. He was very honest and sincere about our heating system and how to properly maintain it. We will definitely use GNK for all of our plumbing needs in the future. I already recommended him to my neighbors. Thanks again for your help Jean!

Details: No, repair is not urgent • No, the building is not currently flooded • Part of a larger issue with the plumbing system • House

Plumbing Pipe Repair

Gary P.

Mar 16, 2026

•

Hired on Thumbtack

I had a great experience with GNK Plumbing & Heating while working on my dishwasher replacement project. Jean was incredibly prompt, professional, and quick to respond to my request for help. To my surprise, he even showed up the very same day, which made the whole process much easier and less stressful. The work was done efficiently and with great attention to detail. I truly appreciate the fast service and excellent workmanship—thank you, Jean and the team at GNK Plumbing & Heating, for the great work!

Details: No, repair is not urgent • No, the building is not currently flooded • House

Plumbing Pipe Repair

Tom M.

Feb 4, 2026

•

Hired on Thumbtack

Details: 0 sinks • One handle controls both hot and cold water • 1 faucet • A few weeks ago

Sink or Faucet Repair

FAQs

What should the customer know about your pricing (e.g., discounts, fees)?
I offer multiple options with different proces and offer discounts depending on the job
What is your typical process for working with a new customer?
meet to customer assess the issue and discuss the options for the solution and make sure the customer is comfortable with our work
What education and/or training do you have that relates to your work?
I completed my journey license and master license. I have attended trainings around boilers and I complete yearly trainings to stay up to date with the latest procedures