A the expansion tank is one of the most common boiler leak complaints HeatLand sees across Metro Vancouver. Here is what causes it, what it means, and how we fix it – honestly.
If you see fast water loss, smell gas, or notice unusual sounds with the leak, shut off the boiler and the water supply to it immediately, then call HeatLand at (604) 330-3812. Never leave a leaking boiler running unattended.
What causes this leak
A waterlogged or corroded expansion tank can cause overpressure and PRV discharge, or leak directly from a failed diaphragm or corroded tank body.
How HeatLand diagnoses and repairs it
We check the tank’s air charge (it should typically be 12 PSI cold), test the diaphragm, and replace the tank if it’s waterlogged, corroded, or past its service life. Expansion tank replacement is a straightforward repair that restores proper system pressure.
Why it matters
An expansion tank that has lost its air charge allows system pressure to spike every time the boiler heats up, stressing the PRV and all system components. Replacing it is usually a quick, affordable fix.
Repair or replace?
If the leak source is a component (valve, pump, tank, fitting), repair is usually straightforward. If the boiler body or heat exchanger is leaking, replacement is typically the safer path. We advise honestly and check your rebate eligibility if replacement is needed.
HeatLand diagnoses and repairs boiler leaks across Metro Vancouver — licensed, insured and TSBC-certified since 1999.
Why Greater Vancouver homeowners trust HeatLand for boiler repairs
- Serving Metro Vancouver since 1999 – licensed, insured and TSBC-certified
- Fast response – fast where possible, emergency service
- Expert diagnosis on every major boiler brand
- Honest repair-vs-replace advice and upfront pricing
- Rebate help if replacement qualifies for CleanBC or utility programs
- Free, no-obligation estimates
Frequently asked questions
Is a leaking boiler dangerous?
A leaking boiler is always worth taking seriously. Fast water loss, unusual noises or a gas smell alongside a leak mean you should shut off the boiler and water supply immediately and call a licensed technician. Call (604) 330-3812.
How quickly can HeatLand respond to a boiler leak?
We offer fast response where possible and emergency service for urgent boiler failures across Metro Vancouver. See emergency HVAC.
Should I repair or replace a leaking boiler?
It depends on the source of the leak, the age of the boiler, and the repair cost. We give honest repair-vs-replace advice – and if replacement makes sense, we check your rebate eligibility. See rebates.
Do you offer a free estimate?
Yes – free, no-obligation estimates with upfront pricing before any work begins. Call (604) 330-3812.
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