Call Now 416-727-5810
Free Online Estimate

Who This Service Is For

Galaxy Plumbing's water heater repair service is built for:

  • Homeowners with no hot water or inconsistent hot water: whether the cause is a tripped breaker, a failed thermocouple, a depleted element, or a unit at the end of its service life
  • Owners of gas water heaters: that require a TSSA-certified technician for all burner, valve, and gas connection work - unqualified gas appliance work creates carbon monoxide and fire risks
  • Homeowners considering a tankless upgrade: who want an honest assessment of whether their gas line, electrical panel, and household demand profile support a tankless installation
  • GTA homeowners paying monthly Reliance or similar rental fees: on a water heater that may cost less to purchase outright within a few years of eliminated payments
  • Homes with boiler-connected indirect hot water tanks: that require a technician experienced in both plumbing and hydronic systems

If your water heater is showing warning signs - pooling water at the base, gurgling or popping sounds, discoloured water from the hot tap - contact Galaxy Plumbing for a same-day diagnosis. These symptoms don't improve on their own. Our emergency repairs team is also available 24/7 for complete hot water failures.

What This Service Includes

Galaxy Plumbing's water heater service covers the full scope of repair and replacement:

Repair services for tank units:

  • Thermocouple and thermopile replacement for gas units
  • Gas valve and pilot assembly service, including igniter replacement
  • Heating element replacement for electric units
  • Thermostat replacement for electric units
  • Pressure relief valve replacement
  • Anode rod replacement to extend tank service life
  • Sediment flush for units with moderate buildup
  • Dip tube replacement for units producing lukewarm water

Replacement and installation:

  • Traditional tank water heater installation - disposal of old unit, connection to existing gas or electrical supply, proper temperature and pressure relief valve installation, and final operational test
  • Tankless water heater installation - on-demand systems with gas line capacity assessment before any recommendation
  • Indirect hot water tank service for homes with boiler-connected hydronic systems - see our in-floor heating and hydronic service for the full scope of radiant system work
  • Rental unit replacement - purchased replacement for homeowners on Reliance or similar monthly rental agreements

All gas water heater repair and installation is handled by TSSA-certified gas technicians with active registration. Permits are pulled for all new installations.

How It Works

Step 1: Diagnosis Before Any Recommendation

Contact Galaxy Plumbing by phone or online. For complete hot water failures, our emergency repairs team responds same-day. For non-urgent assessments, we confirm a specific arrival window at your convenience. Our technicians perform a thorough on-site diagnosis - gas units, electric units, and hydronic systems before recommending repair or replacement.

Step 2: Clear Options, No Pressure

You receive a clear explanation of what failed, what repair involves, and whether the unit's age and condition make repair or replacement the more practical choice. If a tankless installation is being considered, our TSSA-certified technicians assess your existing gas supply capacity and household demand before making a recommendation. We don't install equipment that isn't matched to your home's infrastructure.

Step 3: Repair or Installation, Permitted and Documented

Every repair is completed to Ontario code. New installations include all required permits - which matters when you sell your home, as buyers, lenders, and home inspectors increasingly scrutinize permit records for gas appliances. Before-during-after documentation is standard.

When Repair Makes Sense vs. When to Replace

Not every water heater failure warrants replacement. Here's how we assess the decision:

Repair is usually the right call when:

  • The unit is under 10 years old and experiencing its first component failure
  • The failure is isolated - a single element, thermocouple, or anode rod
  • The tank shows no visible corrosion on the exterior body or flue
  • A sediment flush restores adequate performance

Replacement becomes the more practical choice when:

  • The tank is over 10 years old and experiencing its first major failure
  • Visible rust or corrosion appears on the tank exterior or in the flue
  • Multiple components have failed within a short period
  • Sediment accumulation has reduced capacity and efficiency beyond what a flush can address
  • The unit is a rental and the monthly fee no longer makes financial sense

If you're unsure, our technicians provide an honest assessment. Our blog post on no hot water causes covers the most common failure patterns and how they map to repair vs. replacement.

Benefits

Choosing Galaxy Plumbing for water heater repair in Mississauga means:

  • Accurate diagnosis first: we don't guess, and we don't recommend replacement when repair is the right answer
  • TSSA-certified gas technicians: with active registration for all gas appliance work - the legal requirement in Ontario, and a genuine safety matter
  • Same-day service: available for complete hot water failures across Mississauga and the GTA
  • Honest replacement guidance: if a 12-year-old tank with visible corrosion isn't worth repairing, we'll say so clearly
  • Permit-compliant installations: for all new gas appliances, including the paperwork that protects you at resale
  • Full-system capability for boiler-connected indirect tanks and hydronic systems - not just standalone water heaters

According to Natural Resources Canada, an ENERGY STAR certified tankless water heater uses up to 30% less energy than a conventional storage tank model - a meaningful consideration when a tank is already approaching end of service life.

No hot water? Contact Galaxy Plumbing for same-day water heater repair or replacement across Mississauga and the GTA. TSSA-certified. Upfront pricing. No surprise invoices.

It's all love, baby.

We love what we do.
It's pretty much all because of you.

"Rob cares. Anytime we had questions, he would walk us through beginning to end."
"Rob and Galaxy plumbing were fantastic."
Nancy Pascua ★★★★★
Just fantastic service. Spent extra time trying to figure out a mysterious water leak. Super professional and knowledgeable. Gave me options and time to decide how to proceed. Would use again and would recommend to anyone.
Bev Battaglia ★★★★★
Fantastic job by Galaxy Plumbing!  Appreciated the professionalism and informative service from this team.  I had a toilet and sink back up issue which the technician was able to come and resolve the same day I called.  At the same time, recommendations were shared to prevent similar issues in the future.  Great attitude and top notch workmanship!
Jason Lobo ★★★★★
Rob's service from start to finish was exceptional. Spoke with him about getting a dripping bathtub faucet fixed. Walked me through how to remove the valve cover. Also correctly guesses that it was a water cartridge issue.  Booked a plumber the next day and sent me a text with the ETA. The communication through out was fantastic. For some one who has never booked a plumber for a smaller job, understand that it's not cheap. And you have to consider the cost of parts if not covered under warranty. Would definitely recommend Rob and use his company again if needed.
William Hucker ★★★★★
Galaxy Plumbing Inc has been our go-to plumbing solutions contractor for over 2 yrs, on my job-sites and in my home. Their knowledge and professionalism is hard to beat. They are my first call and I am always impressed with the workmanship and honesty.
If you are reading this and considering their services, just call them. Do not hesitate. The best there is.
Starr Shah ★★★★★
Rob did a wonderful job when I called to have him service/repair a leaking toilet. He was very responsive, punctual, efficient, and made sure he left the job clean. Will definitely call on him again for any future plumbing issues.
Madhavi Wadkar ★★★★★
We had our old plumbing stack replaced, and new connections set up for a re-model. Rob was great, not only did he do what we needed done, but he made some great suggestions and recommendations to make things easier for us. Very knowledgeable, professional and a pleasure to work with, we will be using Galaxy again and soon.
Trevor Arnold ★★★★★
From start to finish Rob was a pleasure to deal with.  Responded to my initial inquiry right away.  Communication was fantastic and the actual work even better.   Showed up on time and was friendly.  Finished the job in a VERY timely manner.  I would suggest anyone looking for plumbing work to be done use his services as well, you won't be disappointed!
Christine ★★★★★
Excellent service!  Rob was super responsive and extremely respectful of our space.  We had our toilet replaced by him and he found us a nice one with a strong flush.  His work was very clean and really well done.  I didn’t have to worry about a thing - I will definitely use him again and have already recommended him to friends and family.  He’s efficient, responsive, respectful, clean, on time, and knows what he’s doing.
aniko vargha ★★★★★
I would highly recommend Galaxy Plumbing.
Rob was extremely Proffessional and quickly reviewed the job and fixed it on budge, actually slightly lower than the estimate!
He was responsive and got back to me within a day of  my request to set up an appointment.
If you have any plumbing issues call Rob, you won’t be disappointed.
Elaine Allen-Milne ★★★★★
Rob was great. On time quick to assess and fix the problem and also point out some other issues That should be addressed. He explained everything really well. Will definitely use him again. Definitely recommend
Maz Mozaffari ★★★★★
This is the 2nd time we've used Rob and his company Galaxy Plumbing for various plumbing needs. They have always been very responsive, helpful, and knowledgeable.  In our most recent call out, Rob was very thorough in explaining the potential causes to our new plumbing issues, and provided a number of possible solutions without trying to pressure us to take on any unnecessary work. He was very careful to properly check and verify that the issue was resolved before he left. This was much appreciated.  We would not hesitate to use Rob and his company again in the future.
Louise P ★★★★★
I had an issue with my kitchen faucet and called Galaxy Plumbing because I had seen their van in my neighbourhood. Rob returned my call and came to have a quick look and assess the situation. He ended up taking the time to fix the faucet while he was here. He was very responsive, professional and friendly.

Related Service

  • Water Heaters - Full overview of tank and tankless systems we install and service across the GTA
  • Emergency Repairs - 24/7 response for complete hot water failures and water heater-related flooding
  • In-Floor Heating - Hydronic system expertise for homes with boiler-connected indirect hot water tanks
  • HVAC Services - Bundled mechanical coverage for homes managing both plumbing and HVAC under one plan
  • Water Filtration - Hard water treatment to extend water heater service life in GTA areas with high mineral content
  • Drain Snaking and Cleaning - If related plumbing concerns exist near the water heater location

Service Areas

Galaxy Plumbing provides water heater repair and replacement across:

‍Contact us to schedule water heater repair or replacement. You can verify our TSSA certification status directly through the Technical Standards and Safety Authority and our licensing credentials through Ontario's licensed tradesperson registry.

Frequently Asked Questions

1. What does water heater repair in Mississauga involve?

2. How long should a water heater last in a GTA home?

3. Why do I have lukewarm water instead of no hot water at all?

4. Is a tankless water heater worth the additional cost?

5. Can Galaxy Plumbing replace a Reliance rental water heater?

6. What causes discoloured or rusty water from the hot tap?

Call Now 416-727-5810

About

Blog

Services

Property management

COntact

Privacy

FREE ESTIMATE

Superior web by Uroboro