At what age should a water heater be replaced?

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How Long Does a Water Heater Actually Last?

A conventional storage tank water heater, gas or electric, typically lasts 8 to 12 years before internal corrosion or sediment buildup causes a failure. Metro Vancouver's water is relatively soft compared to many parts of North America, which is gentler on tanks than hard-water regions, but older homes with galvanized piping, aging anode rods, or units installed in a crawlspace or unheated garage often see shorter lifespans. Tankless (on-demand) water heaters are built differently, with no tank to corrode from the inside out, and commonly last 15 to 20 years when the heat exchanger is descaled on schedule.

Signs Your Water Heater Is Nearing the End

Age is a starting point, but the actual condition of the unit tells the real story. A tank that's 7 years old but already showing problems may need replacing sooner than a well-maintained 11-year-old unit.

• Rusty, discoloured, or metallic-tasting hot water, which often points to a corroding tank interior
• Rumbling, popping, or crackling sounds during heating, usually caused by sediment hardening at the bottom of the tank
• Any moisture, dampness, or pooling water around the base of the tank, which can indicate a hairline crack
• Noticeably less hot water than before, or water that cools faster than it used to
• Visible rust on the tank shell, fittings, or the temperature-pressure relief valve
• Needing a repair call more than once in the past year or two

What Homeowners Can Safely Check Themselves

Some basic observation is safe and doesn't require a technician. You can look at the age label on the unit (usually on a sticker near the top, sometimes as a manufacture date or serial number that encodes the year), check the floor and drain pan around the tank for moisture, run the hot tap to check colour and clarity, and listen for unusual sounds when the burner or element kicks in.

What you should not attempt yourself: draining and flushing a tank you're unfamiliar with, adjusting the gas control valve or thermocouple, disconnecting gas or electrical lines, or replacing the temperature-pressure relief valve. In BC, gas fitting and most electrical work on a water heater must be performed by a licensed technician under Technical Safety BC requirements — this protects you from carbon monoxide risk, gas leaks, and electrical fire hazards, and it matters for insurance and resale if work was ever done without a permit.

What to Expect From a Professional Inspection

A licensed technician visiting an aging water heater will typically check the anode rod (a sacrificial metal rod that protects the tank from corrosion — once it's consumed, the tank starts rusting from the inside), test the temperature-pressure relief valve, inspect venting and gas connections on gas units, check for sediment buildup, and assess the tank shell and fittings for early signs of leaking. On a repair call, they'll give you an honest read on whether the unit is worth repairing or whether replacement makes more financial sense given its age and condition, along with a free written quote for either path.

Repair or Replace: How to Decide

A simple rule many technicians use: if the tank is under 6 years old and the repair is minor (a thermostat, heating element, or relief valve), repair usually makes sense. If the tank is past 8-10 years old and the issue involves the tank itself, corrosion, or a leak, replacement is usually the better long-term choice, since a repaired old tank can still fail suddenly and cause water damage.

• Under 6 years old, minor component issue: repair
• 6-8 years old, repeated repairs needed: start budgeting for replacement
• 8+ years old with any tank corrosion or leak signs: replace
• Any age with a cracked or leaking tank shell: replace immediately

Planning a Replacement in Metro Vancouver

Replacing before a failure gives you time to choose the right unit rather than scrambling during an emergency. Tankless water heater installation in the region typically falls in the $3,500-$7,500 range depending on venting, gas line sizing, and whether a gas line upgrade is needed for the higher BTU demand of a tankless unit. Costs vary based on tank size, whether you're switching from tank to tankless (which often requires new venting and gas line work), and access in condos or older townhomes where mechanical rooms can be tight.

If you're already planning other mechanical upgrades, current programs to ask about include the interest-free Canada Greener Homes Loan (up to $40,000) and the Oil to Heat Pump Affordability program, along with CleanBC, BC Hydro, and FortisBC rebates where applicable. These programs and amounts change, so confirm exact current figures at the time of your quote rather than relying on older information.

Frequently asked questions

Reviewed by the CANRO Heating & Cooling service team — July 05, 2026. CANRO holds Technical Safety BC gas licence LGA0043870 and boiler licence LBP0046450, employs Red Seal certified technicians, and carries WorkSafeBC and liability insurance. 4.9★ from 85+ Google reviews · serving Metro Vancouver since 1999 · (604) 359-1081 · info@canroheat.ca.