Water Heater Repair & Installation in Toronto & GTA — Tank and Tankless

Water heater service covers repair, maintenance, and full replacement of tank and tankless hot water systems in Toronto homes and businesses.

Tank water heater service includes pilot light and thermocouple replacement, anode rod inspection and replacement, temperature and pressure relief (TPR) valve testing and replacement, drain valve replacement, and dip tube inspection. Tank units typically last 10–12 years before corrosion or sediment buildup makes repair uneconomical.

Tankless water heater service covers descaling (critical in Toronto's moderately hard water environment at 7.3 gpg), igniter and flow sensor diagnostics, venting inspection, and gas valve testing. Annual descaling prevents premature failure and maintains rated efficiency.

Full replacement is recommended when a tank unit is over 10 years old or showing significant corrosion, or when repair costs exceed 50% of replacement cost. We carry 40-gallon and 50-gallon natural gas tank units in stock for same-day swap-out. Electric tank units and specialty sizes require a 24-hour parts order in most cases.

Rental water heater services — many GTA homeowners rent water heaters from Reliance or EnerCare. We handle rental unit replacements as well as permanent buyout installations.

Water heater service costs vary significantly between repair and replacement. Always get a written estimate before authorising work.

Service	Cost Range (CAD)
Diagnostic / service call	$100–$200
Thermocouple replacement	$150–$300
TPR valve replacement	$200–$350
Anode rod replacement	$200–$400
Tank water heater replacement (40–50 gal gas)	$1,200–$2,200
Tank water heater replacement (electric)	$900–$1,800
Tankless water heater installation	$2,500–$4,500
Annual tankless descaling	$150–$300

Prices include unit, labour, and disposal of old unit. Upgrading from tank to tankless requires gas line and venting modifications which add $300–$800 to the project. Burlington, Oakville, and Leaside pricing runs 5–15% above the Toronto average.

Contact a licensed plumber if you notice:

• No hot water or inconsistent hot water temperature
• Rust-coloured water from hot taps only
• Popping, rumbling, or banging sounds from the tank (sediment buildup)
• Water pooling around the base of the tank (tank failure is imminent)
• Age over 10 years — annual inspection recommended for all units over 8 years
• Pilot light that repeatedly goes out
• Rotten-egg smell from hot water (anode rod failure in tank with anaerobic bacteria)
• Energy bill increase without change in usage (efficiency loss from sediment buildup)

Step 1 — Diagnosis call. We assess symptoms over the phone to determine whether an emergency visit is needed or whether a scheduled appointment is appropriate.

Step 2 — On-site inspection. The plumber tests the unit, checks all components, and confirms whether repair or replacement is the right option. A written estimate is provided before proceeding.

Step 3 — Repair or replacement. For repairs, we carry common parts. For replacements, we carry standard tank sizes — your old unit is disconnected, hauled away, and the new unit is installed and tested in a single visit.

Step 4 — Compliance check. We ensure the new installation meets current Ontario Building Code seismic strapping requirements and proper venting specifications.

We provide water heater service across all applicable GTA areas:

North York water heater repair | [Scarborough is covered under emergency service] | Etobicoke water heater repair | Ajax water heater repair | Brampton water heater repair | Burlington water heater repair | Markham water heater repair | Mississauga water heater repair | Newmarket water heater repair | Oakville water heater repair | Oshawa water heater repair | Richmond Hill water heater repair | Vaughan water heater repair | Whitby water heater repair

• When to replace your water heater — repair vs. replace decision guide for GTA homeowners
• 2026 Toronto plumbing cost guide — full pricing including water heater installation costs