October Is Breast Cancer Awareness Month

Proceeds of New Installations to Benefit The Gloria Gemma Breast Cancer Research Foundation

GEM plumber servicing residential water heater

Hot Water Solutions for Waltham Homes

New England weather puts extra demands on your water heater. When your system can’t keep up with the cold, you need a trusted team that understands local conditions and responds fast.

GEM Plumbing & Heating Services, LLC responds fast when your water heater fails. Our licensed plumbers serve Waltham with same-day installation and honest pricing. We install quality systems that deliver reliable hot water for years. Call GEM today for water heater installation services in Waltham.

(833) 222-2953


Need Water Heater Installation in Waltham? GEM is Close By!

Since 1949, GEM has been the trusted choice for Waltham homeowners. Our decades of experience mean we understand what local homes need.

Three generations of local families have counted on us, from Moody Street to the Watch Factory and the college areas. That experience means we know the Victorian-era homes, three-deckers, and newer developments and the unique challenges they present. Being local means we respond faster and serve you better. When you need water heater installation done right, we’re already close by.

(833) 222-2953


Skilled employees

Trucks on the Road

Years in Business

Emergency Service


Female Gem Plumbing u0026 Heating employee sitting at a desk smiling

(833) 222-2953

Our Water Heater Installation Process

A broken water heater disrupts your whole household. GEM’s simple process gets you back to normal quickly. Here’s what to expect when you need a new water heater installed in Waltham:

Our technician examines your current water heater and assesses your household’s hot water needs.

We present replacement choices that fit your space, energy source, and budget. You’ll see transparent pricing before we proceed.

Our licensed plumbers disconnect and remove your old unit, install your new water heater, and make all connections properly.

We verify your new system heats correctly and operates safely. We clean up completely and confirm your satisfaction.


What Our Customers Are Saying

100% Satisfaction Guarantee

4.6
Based on 9506 reviews
Steven Pichette
21 hours ago
August 27 2025 . Another excellent yearly electrical plumbing , & heating checkup by Eric Governo , Brody Lott , Aiden Cunningham and crew. Thanks! Aug 2025 – Excellent service by Jacob and his coworker . Yearly maintenance on our Generator . Great service as always . Routine maintenance appointment for our boiler . Highly recommended . 2025- same great service for our routine maintenance for our central air unit. May 14, 2026 – great yearly central air maintence by Joe and Anthony . Professional and helpful explaining the inspection they preformed August -18 2026 – we had our yearly maintence for our generator . Aiden was the Gem tech that came out and did the yearly maintence. Aiden was excellent answering all my questions regarding the generator . Was a pleasure having Aiden serviced our yearly generator maintenance August 21-2026. Gem tech Richard stopped by today to go over a couple of issues with our central air unit . Excellent visit and service . August 28 2026 – another great professional visit today by ( Senior ) Joseph . Our central air went down and was fixed in less than 24 hours . Thanks again ! Oct 1 2026 – Erikson M and Demetris arrived to inspect my furnace for its yearly tune up . Another excellent professtional visit. Thank You !
Kate Kelley
21 hours ago
I had a plumbing emergency today & GEM had a guy on my doorstep within 1/2 hour. I couldn’t even get a return phone call from anyone else. Excellent service!
Robert Smith
22 hours ago
Christopher was efficient and courteous and completed my boiler and split unit heat annual maintenance quickly. Highly recommended!
Maureen Walsh
22 hours ago
Rainey was excellent . He explained why my system failed and explained what a new system would cost . We agreed to replace our furnace which was 24 years old . Rainey and Pedro showed up at 8 and before 4 I had a new furnace installed and the old one hauled away .Easily explained all the process , he was excellent
Kate Pomert
22 hours ago
the price put me in sticker shock …..but the work was exceptional. they did a great job and explained to me what they did.
Buck Bruce
22 hours ago
Seemed very knowledgeable and very informative. Friendly service as well.
Jim Harrod
23 hours ago
I was thoroughly impressed with the superb HVAC maintenance service I received from David Santiago and trainee, Kevin today! Before David and Kevin arrived I was very disappointed with having had my original service date rescheduled to what I thought were spurious reasons? In fact David and Kevin arrived after the designated rescheduled date and time today. GEM's communication was excellent throughout and their people seemed genuine and concerned. When David and Kevin arrived it turned the whole situation around. They could not have been more professional and knowledgable! I am now firmly committed to GEM and their Home Comfort maintenance program.
Maren Stack
1 day ago
Professional, informative, and reliable!
Malek Askar
2 days ago
We just had our heating system replaced. We went from forced hot water system to a central heating and air conditioning system done by GEM plumbing and heating company We had Omar and Michael work in our home for 5 days they installed all the ductwork, the furnace and the condenser. These guys were very professional, kind, clean and informative throughout the whole install every day they explaind what they did and what is the expectation for the next day. Today was the last day they walked me through the whole system, how to change the filter how to operate the new thermostat and what to look for when things are not working properly. I say thank you to the whole team from planing to done, all went great to expectations
Donna Rubinate
2 days ago
Erickson was great. Efficient, friendly and through. Very professional
Dawn Riall
2 days ago
Ryan and his crew were excellent. They were very knowledgeable and took the time to explain things to me. They were helpful and looked for alternatives for my situation. Not looking to simply make a buck and drive up the bill. Even went out of their way to clear way the awful spiders and buckets of water. Would highly recommended Ryan and Gem. Thank you.
Perfect call: rapid diagnosis and plan for repair
Jillian Johnson
2 days ago
Responsive. Organized. Tracks warranties and sets up maintenance schedule.. Various experience levels for specific jobs. Quality work. Pricier but worthy.
Nelson did a great job
On time, friendly, professional and thorough testing and maintenance of old gas boiler and hot water heater, tested all radiators. Great communication about exact arrival time and throughout the process. GEM has well trained professionals. Excellent service as part of my maintenance contract.
Mary Maltezos
2 days ago
Both techs were very professional and answered any questions we had. Also showed us how ro replace humidifier filter when needed. Worked steadily, cleaned furnace and replaced parts requested.
Our service rep Rainey was very professional knowledgeable and described the work and process of how GEM works in an easy to understand way. This was our first time using gem and we had a great experience
AXS441 GM
2 days ago
9-30-26 Excellent! Extremely detailed and thorough. Explained all actions clearly, and very pleasant, and knowledgeable. Very impressed and hope to receive his services in the future. Thank you, A ———————- For Friday. Aug. 21, 2026 by John Excellent!! He checked all vents and 2 air handlers To track locations of Freon. Determined proper pressure levels and other settings were ok but not cooking. Very thorough and knowledgeable. Since performed all these checks, Can he return to finish his work!!! Thank you, Ayres Services were related to lg heat pump, Not items that follow… And price not determined not finished..
Alice Wood
2 days ago
Cane same day, very efficient and great helpful hints, very personable
Thanks to Nehemias and Partner for a great job routine maintaining of my hvac system!
Paul Allen
2 days ago
Great customer service
Heidi Gobeille
2 days ago
Colin was so helpful and efficient. Highly recommend
Cp School
3 days ago
Courteous, knowledgeable and prompt service!
I had a leak coming from my shower into the downstairs. The plumbers were very thorough and found the leak. They cleaned up afterwards and a great job. They kept us informed throughout the process.
Robert Davis
3 days ago
Installers came on time. Finished on time, explained all operational details clearly. Very professional


How to Know When You Need a New Water Heater Installed

When these problems appear, replacement is often the smartest choice.

These signs are common in aging water heaters throughout Waltham. GEM can help you determine the best path forward.

Most water heaters last 8 to 12 years. If yours is approaching or past the 10-year mark, efficiency has likely dropped and the risk of failure increases. Replacing now avoids unexpected breakdowns and the inconvenience that comes with them.

Discolored hot water or visible rust on the tank exterior signals corrosion inside. While sometimes caused by aging pipes, rust in hot water that clears up after running usually points to the water heater itself. This problem only gets worse.

If your water heater used to recover quickly between uses but now takes hours, age and sediment are catching up. When flushing no longer helps, the system is losing capacity. Replacement restores reliable hot water.

For gas water heaters, a pilot light that keeps going out indicates a failing thermocouple or other component. While sometimes repairable, recurring pilot problems in older units often point toward replacement being the better investment.

Water heater in a residential basement.

We Install All Types of Water Heaters in Waltham

Choosing the right water heater means matching capacity to your household’s needs. GEM guides you to the best solution.

Here’s a look at the types of water heaters we install in Waltham:

Tank water heater installation in Waltham is the tried-and-true choice for most households. These units store 40-80 gallons of heated water, ready whenever you need it. Tank models work with gas or electric power, install affordably, and deliver dependable performance for families running showers, laundry, and dishes throughout the day. For consistent hot water without surprises, a properly sized tank water heater gets the job done.

Tankless water heater installation in Waltham appeals to homeowners who want endless hot water and energy savings. These compact units heat water on demand as it passes through, so you never run out mid-shower. Tankless systems mount on walls, freeing up floor space in tight basements or utility closets. GEM installs tankless water heaters in Waltham homes looking for efficiency and long-term value.

Whether tank or tankless, today’s high-efficiency water heaters cut energy use without sacrificing performance. GEM installs ENERGY STAR certified models that qualify for rebates and lower your monthly utility bills. We’ll help you weigh upfront costs against long-term savings to find the smartest choice for your Waltham home.

GEM Plumbing Heating Cooling u0026 Electrical branded van close-up

(833) 222-2953

Waltham Residents Trust GEM for Water Heater Installation: Here’s Why

When you need water heater help in Waltham, there’s one name local families trust: GEM. Here’s what sets us apart.

Since 1949, GEM has been the name families trust for home comfort. Decades of experience mean we’ve solved every water heater challenge imaginable.

When your water heater quits, you shouldn’t wait days for help. Our 500-truck fleet and 700+ technicians mean we’re nearby and ready. often arriving the same day you call.

GEM’s technicians are fully licensed, insured, and trained to meet the highest industry standards. Your home is in capable, trustworthy hands.

GEM provides detailed estimates upfront. You’ll understand exactly what you’re paying for before any work begins. No surprise charges, ever.

We install trusted brands and durable, energy-efficient water heaters built to deliver reliable hot water for years to come.

GEM treats every customer like a neighbor. We’re responsive, respectful, and focused on your satisfaction from first call to final inspection.


Our GEM Family Cares for Your System’s Entire Life

A new water heater is an investment worth protecting. Regular maintenance ensures peak performance and maximum lifespan.

GEM’s Home Comfort Club makes upkeep easy. Members enjoy annual maintenance visits, priority scheduling, and exclusive discounts on repairs and future installations. We catch small problems before they become expensive emergencies, helping your water heater last longer and perform better.

customer and technician interaction

GEM technician in front of service truck

Contact GEM for Water Heater Installation Services in Waltham

Tired of cold showers and inconsistent hot water? GEM has the solution.

Reach out today to schedule your water heater installation in Waltham. Our team responds fast, installs professionally, and makes sure you’re completely satisfied. Same-day service is available. Call GEM today or contact us online to schedule your water heater installation in Waltham!


Other Water Heater Services You May Need


Water Heater Installation FAQs

What kind of warranty comes with water heaters?

Manufacturer warranties on tank models typically cover the tank for 6 to 12 years. Higher-quality units tend to have longer coverage. GEM ensures Waltham customers understand their warranty before purchasing.

Does Mass Save offer incentives for water heater replacement?

They do, for qualifying high-efficiency models. The program offers rebates that can make upgrading to efficient equipment more affordable for Waltham homeowners. GEM helps you navigate the options and choose equipment that qualifies for maximum savings. We’re familiar with the current programs and can guide you through the application process.

Do I need a permit for water heater installation?

In most cases, yes. Water heater installation typically requires a permit to ensure the work meets local codes. GEM handles permitting as part of our standard service for Waltham customers. We pull the necessary permits and schedule inspections so you don’t have to navigate that process yourself.

How do I maintain my new water heater?

Annual flushing to remove sediment buildup extends water heater life and maintains efficiency. The anode rod should be checked every few years and replaced when depleted since it protects the tank from corrosion. GEM’s Home Comfort Club includes maintenance visits that handle these tasks. For Waltham homes with hard water, more frequent flushing may be beneficial.

My water heater is having problems. Should I repair or replace it?

That depends on what’s wrong and how old the unit is. A relatively new water heater with a failed heating element or faulty thermostat is usually worth repairing. But if your system is approaching 10 years old and showing multiple symptoms like inconsistent temperatures, strange noises, and rust in the water, replacement is typically the smarter investment. GEM serves Waltham with honest recommendations, not upsells. We’ll tell you what we’d do if it were our own home.