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Verified Reviews for Gas Leak Repair pros in Grantham, NH

*The Angi rating for Gas Leak Repair companies in Grantham, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Gas Leak Repair needs.

*The HomeAdvisor rating for Gas Leak Repair companies in Grantham, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Gas Leak Repair needs.

Last update on October 31, 2025

Find Gas leak repair technicians in Grantham

Avatar for GM Mechanical LLC

GM Mechanical LLC

243 Schoodac Road
5.00(
8
)
•Approved Pro

GM Mechanical LLC

243 Schoodac Road
5.00(
8
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
44 local quotes requested

At GM Mechanical LLC, our top priority is customer satisfaction. We perform top quality work at an affordable rate. We are a family owned and operated buisiness who provide clean and neat work, and treat every home with care and respect. We look forward to working with you!

"They were great - arrived on time and finished the job quickly"

Jeff R on June 2024

At GM Mechanical LLC, our top priority is customer satisfaction. We perform top quality work at an affordable rate. We are a family owned and operated buisiness who provide clean and neat work, and treat every home with care and respect. We look forward to working with you!

"They were great - arrived on time and finished the job quickly"

Jeff R on June 2024

Avatar for Action Plumbing Heating And Air

Action Plumbing Heating And Air

75 South Main Street
4.92(
83
)
•Approved Pro

Action Plumbing Heating And Air

75 South Main Street
4.92(
83
)
•Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
86 local quotes requested

Action Plumbing, Heating, and Air provides prompt and reliable services to homeowners and businesses. We are fully licensed, bonded, and insured and able to repair or replace any plumbing or heating fixture inside or outside of your home or business. We stand behind our products and services by installing only quality materials and hiring only state licensed plumbers. At Action, we pride ourselves on practicing the highest standards in the business to ensure our customers are provided the best service possible. Take Action against your plumbing or heating problems and call Action! (833) 732-2288

"Zach from action was great, he was very professional, friendly and efficient, and did great work. I would 100% use action again based on my experience with Zach and the quality of work."

Wyatt M on August 2025

Action Plumbing, Heating, and Air provides prompt and reliable services to homeowners and businesses. We are fully licensed, bonded, and insured and able to repair or replace any plumbing or heating fixture inside or outside of your home or business. We stand behind our products and services by installing only quality materials and hiring only state licensed plumbers. At Action, we pride ourselves on practicing the highest standards in the business to ensure our customers are provided the best service possible. Take Action against your plumbing or heating problems and call Action! (833) 732-2288

"Zach from action was great, he was very professional, friendly and efficient, and did great work. I would 100% use action again based on my experience with Zach and the quality of work."

Wyatt M on August 2025

Propane Services of New England

No reviews yet

Propane Services of New England

No reviews yet

We are a gas service company, mainly focused on propane services such as tank, piping and ductwork installs. We also do residential service work on boilers, furnaces, gas water heaters and much more.

We are a gas service company, mainly focused on propane services such as tank, piping and ductwork installs. We also do residential service work on boilers, furnaces, gas water heaters and much more.

Avatar for Triumph Heating and Cooling LLC

Triumph Heating and Cooling LLC

590 SUGAR HILL RD
3.00(
2
)

Triumph Heating and Cooling LLC

590 SUGAR HILL RD
3.00(
2
)
Free onsite estimate

Triumph Heating and Cooling LLC is your local trusted service and installation team for anything Heating and Cooling related. We install, Service and Maintain gas/oil heating equipment, air conditioning, water heaters, space heaters, ductless mini splits, and more! Our licensed technicians provide top of the line service to our valued customers, ensuring the job is done right the first time. Call today to schedule your service or install!

"He started great, but went down hill. 5 months to install a new heating system after being told it was 5-6 weeks.I was told he had no idea when he could finish because he started a 92 unit condominium project. On another project they installed an HVAC system with no control board. Lied to continuously about dates. We paid in advance for the work and found out afterward that he fired half the staff (I now know why.) Rather than be upfront about the issues he was facing we told lies. Very frustrating and found Devin to talk like an excon. Say one thing and do another with a very straight face."

John R on July 2023

Triumph Heating and Cooling LLC is your local trusted service and installation team for anything Heating and Cooling related. We install, Service and Maintain gas/oil heating equipment, air conditioning, water heaters, space heaters, ductless mini splits, and more! Our licensed technicians provide top of the line service to our valued customers, ensuring the job is done right the first time. Call today to schedule your service or install!

"He started great, but went down hill. 5 months to install a new heating system after being told it was 5-6 weeks.I was told he had no idea when he could finish because he started a 92 unit condominium project. On another project they installed an HVAC system with no control board. Lied to continuously about dates. We paid in advance for the work and found out afterward that he fired half the staff (I now know why.) Rather than be upfront about the issues he was facing we told lies. Very frustrating and found Devin to talk like an excon. Say one thing and do another with a very straight face."

John R on July 2023

Avatar for Merrill Mechanical, Inc.

Merrill Mechanical, Inc.

477 Dunham Rd
4.94(
17
)

Merrill Mechanical, Inc.

477 Dunham Rd
4.94(
17
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Merrill Mechanical, Inc. is mechanical company specializing in plumbing, heating and HVAC installation. We primarily perform new-construction and renovation services in the small-medium commercial space as well as larger, high end, homes. Our talented team works hard everyday to provide the best services for our clients. We customize our offerings based on specific needs, so get in touch today to receive an initial quote. Our rates are $85/hour with a minimum of 2 hours, plus one-way travel time.

"Very prompt and very professional,able to answer all my questions and make some good recommendations to solve my problem (s) Could not ask for better service,Thank you!"

Eric R on April 2021

Merrill Mechanical, Inc. is mechanical company specializing in plumbing, heating and HVAC installation. We primarily perform new-construction and renovation services in the small-medium commercial space as well as larger, high end, homes. Our talented team works hard everyday to provide the best services for our clients. We customize our offerings based on specific needs, so get in touch today to receive an initial quote. Our rates are $85/hour with a minimum of 2 hours, plus one-way travel time.

"Very prompt and very professional,able to answer all my questions and make some good recommendations to solve my problem (s) Could not ask for better service,Thank you!"

Eric R on April 2021

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Gas Leak Repair questions, answered by experts

No, you shouldn't cap a gas pipe with a compression fitting because they aren't designed for gas lines and can pose serious safety risks. Gas pipes require threaded caps that create a secure, leak-proof seal capable of handling gas pressure. Using a compression fitting could lead to dangerous gas leaks—a hazard you definitely want to avoid. 

In North America, pipe measurements are listed as the nominal pipe size (NPS). This measurement refers to the outside diameter. As an example, a 1/2-inch copper pipe has an outside diameter of 5/8 of an inch. If a hardware store lists a pipe as having a 2 NPS, it means that all the pipes with this measurement have a 2 ⅜-inch outside diameter, regardless of wall thickness and inside diameter.

Yes, you can store a propane tank, whether it is full or empty. Remember that the container is contaminated with hazardous materials once it has housed propane, but as long as it’s properly placed in a well-ventilated, temperature-controlled space, a tank is unlikely to cause issues whether it is full of propane or not. 

In most cases, yes, it’s safe to light a gas water heater manually, but you should shut the gas off first, open a window, and let the space air out for about 10 minutes. Modern water heaters shut the gas off entirely if the pilot light goes out, but airing out the area beforehand is good practice and will ensure it’s safe to relight your pilot light manually. Just make sure you turn the gas valve to “pilot” before lighting. If the light keeps going out or won’t light at all, call in a professional.

In some cases, the answer is yes. Being licensed to work on gas lines requires additional specialized training beyond being a licensed plumber. If the plumber is also licensed as a natural gas plumber, they will be able work on natural gas lines. If the plumber is only licensed to work on water and sewer lines, then you’ll have to find another professional to do gas line work.

The Grantham, NH homeowners’ guide to gas leak repairs

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

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