Boiler Leak Repair in Greater Vancouver — Fast, Certified

Boiler Leak Repair in Greater Vancouver — Fast, Certified Service

A leaking boiler is one of the most common no-warning faults we see across Greater Vancouver. Water around the unit means something inside the sealed heating circuit has failed, and left alone it leads to pressure loss, corrosion, electrical faults, and eventually a complete shutdown — usually during a cold snap. ROMA Heating & Cooling has located and repaired boiler leaks across the Lower Mainland since 1999, and our gas-licensed (TSBC) technicians find the real source rather than just mopping up and topping off the pressure.

If your boiler is dripping, losing pressure, or sitting in a puddle, turn it off and call (604) 704-0300. Below is what causes boiler leaks, what you can safely check, and how we fix them for good.

Where Boiler Leaks Actually Come From

A boiler leak almost always traces back to one of a handful of components. Knowing the likely source helps us arrive with the right parts:

• Pressure-relief valve (PRV) — discharges water when system pressure climbs too high. The valve itself may be faulty, or it may be doing its job because the expansion vessel has failed.
• Waterlogged expansion vessel — when the vessel loses its air charge it can no longer absorb expansion, so pressure spikes when the boiler heats and forces water out of the PRV.
• Pump seal — circulating pumps develop weeping seals with age, leaving a slow drip directly beneath the pump.
• Corroded pipework and fittings — joints, unions, and copper near the boiler corrode over time, especially where dissimilar metals meet.
• Auto air vent — a stuck or perished air vent can weep continuously.
• Heat exchanger — the most serious source. A cracked or corroded heat exchanger usually means a repair-versus-replace conversation, since the part is costly.

Symptom vs Likely Cause

What You Can Safely Check First

Before we arrive, a few safe steps protect your home and help us diagnose faster:

1. Switch the boiler off at its service switch and shut off its water supply if you can reach the isolation valves.
2. Place a container and towels under the drip and note exactly where the water is coming from.
3. Read the pressure gauge — note whether it is high (above ~2 bar) or low (below ~1 bar).
4. Check whether the leak gets worse as the boiler heats up; tell us, as it points us straight to the cause.
5. Do not keep topping up the pressure to run the boiler — that only delays the repair and can make the leak worse.

How ROMA Repairs a Boiler Leak

We treat a leak as a diagnostic job, not a guess. Our process:

• Locate the source — we pressure-test the system and inspect the pump, PRV, expansion vessel, air vents, and accessible fittings, isolating zones where the leak is hidden under floors.
• Confirm the underlying cause — for example, replacing a PRV that is weeping because the expansion vessel failed would just fail again, so we recharge or replace the vessel too.
• Repair with genuine parts — we carry common pumps, valves, and seals and source OEM components for your specific make and model.
• Re-pressurise and verify — we bring the system back to the correct pressure, run a full heat cycle, and confirm the leak is gone and combustion is safe before we leave.

Repair or Replace?

Most leaks — pumps, valves, vessels, fittings — are straightforward, cost-effective repairs, and we always quote upfront before any work begins. The exception is a leaking heat exchanger on an older boiler: when the most expensive part of a unit near the end of its life fails, a high-efficiency replacement (often eligible for FortisBC and CleanBC rebates) can be the smarter long-term choice. We give you an honest comparison based on the age, condition, and repair cost of your specific boiler.

Why Boilers Leak in Lower Mainland Homes

A few local factors make leaks more common than homeowners expect. Understanding them helps you catch a leak before it becomes a flood:

• Age of the system — many Lower Mainland boilers are 12–20 years old. Pump seals, valves, and the expansion vessel all wear out in that window, and corrosion accelerates once protective coatings break down.
• Hard-water scale — mineral scale builds in the heat exchanger and on internal surfaces, creating hot spots and stress that eventually crack components.
• System sludge — black iron-oxide sludge from internal corrosion settles in low points, pits pipework from the inside, and wears pump seals. A system that has never been chemically flushed is far more leak-prone.
• Pressure cycling — repeatedly topping up a leaking system raises and drops pressure, which fatigues fittings and the expansion vessel and makes small leaks larger.
• Freeze-thaw on condensate and external pipework — during a cold snap, exposed condensate lines and outdoor pipework can freeze, crack, and leak once they thaw.

How to Prevent the Next Boiler Leak

Once we have fixed the immediate problem, a little maintenance keeps your boiler tight and dry for years:

• Book an annual service — we check pressure, the expansion vessel charge, the PRV, and all accessible fittings, catching weeping parts before they fail.
• Keep system pressure correct — running at the right cold pressure (typically around 1.0–1.5 bar) avoids both overpressure PRV discharge and low-pressure lockouts.
• Add inhibitor and consider a magnetic filter — corrosion inhibitor and a magnetic filter capture sludge before it pits pipework and wears the pump.
• Protect condensate and exposed pipes — insulating the condensate line and any exposed pipework prevents freeze-related cracks.
• Act on small drips early — a minor weep is a cheap fix today and a flooded utility room if ignored.

Same-Day Emergency Boiler Leak Repair Across Metro Vancouver

A boiler leak rarely fixes itself, and pressure loss can leave you with no heat overnight. From our Burnaby base we offer same-day and after-hours emergency leak repair across Metro Vancouver — Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, and Langley. If you have an active leak, no heat, or water near electrical components, call (604) 704-0300 and we will get a gas-licensed technician to you as quickly as possible.

What Our Customers Say

“We had a 12-year-old Navien combi hot water heater and boiler that started to have error messages, E001. Roma arranged service and sorted it out.”

— Alan Info, Google review (★★★★★)

“Roma Heating exceeded my expectations after they replaced my 23-year-old Laars II hydronic boiler.”

— Ed S, Google review (★★★★★)

Frequently Asked Questions

Is a leaking boiler an emergency?

An active leak should be addressed quickly. Water dripping onto electrical components, the gas valve, or the floor can cause damage, corrosion, and pressure loss that shuts the boiler down. Turn the boiler off, place a container under the drip, and call for service the same day.

Why is my boiler leaking water?

The most common sources are a failed pump seal, a corroded pipe or fitting, a faulty pressure-relief valve discharging because pressure is too high, a leaking auto air vent, or a waterlogged expansion vessel forcing the PRV open. A heat-exchanger leak is less common but more serious.

Can I keep using a boiler that is leaking?

No. Running a leaking boiler can short electrical parts, accelerate corrosion, and let pressure drop until the unit locks out. Shut it off and have the leak found and fixed before continuing to use it.

Will topping up the pressure stop the leak?

No. Topping up only masks the symptom of pressure loss. If you are repeatedly re-pressurising, there is a leak somewhere in the boiler or the heating circuit that needs to be located and repaired.

How do you find a hidden boiler leak?

We pressure-test the system, inspect the pump, PRV, expansion vessel, auto air vents, and every accessible fitting, and check for staining and corrosion. For leaks under floors we trace pressure behaviour and isolate zones to narrow down the source before opening anything up.

Related Heating Services

• Emergency Boiler Repair
• Boiler Not Heating
• Navien Boiler Repair
• Gas Boiler Troubleshooting
• Combi Boiler Error Code Repair
• Boiler Repair in Burnaby

Call ROMA Heating & Cooling Today

For fast, professional diagnosis and repair anywhere in Greater Vancouver, call (604) 704-0300 or email info@romaheating.ca. Same-day and after-hours service, gas-licensed and insured, serving the Lower Mainland since 1999.