Boiler Water Leak Repair Across Greater Vancouver
A leaking boiler is one of the most common — and most misunderstood — heating problems we see across the Lower Mainland. Water where it should not be can corrode the gas valve, short out the controls, damage the heat exchanger, and rot the floor and framing around the unit, so a leak is never just cosmetic. The good news is that most boiler leaks are straightforward repairs once the true source is found. ROMA Heating & Cooling has traced and fixed boiler leaks across Greater Vancouver since 1999, with gas-licensed (TSBC) technicians who diagnose the cause rather than just mop up the symptom.
Where Boilers Leak — and Why
Water can escape a boiler at several points, and each tells a different story about the cause:
- Pressure-relief valve (PRV) — often discharging because system pressure is too high or a waterlogged expansion tank is letting pressure spike, not because the valve itself failed.
- Pump / circulator seal — a worn seal weeps at the pump body, usually a clear drip from one fixed point.
- Pipe fittings and unions — corroded or loosened joints, common on older systems and after years of expansion and contraction.
- Expansion tank connection — corrosion at the tank or its fitting, frequently paired with pressure problems.
- Auto air vent — a stuck or failed air vent that weeps at the top of the boiler.
- Heat exchanger — the most serious source; internal corrosion or cracking that usually means replacement on an older unit.
What Causes Boiler Leaks in the First Place
Understanding the root cause stops a leak from coming straight back:
- Corrosion — the leading long-term cause, accelerated by oxygen in the system water and by sludge.
- Excess pressure — a faulty fill valve or waterlogged expansion tank pushes pressure up until the PRV discharges.
- Pressure-temperature cycling — years of heating and cooling loosen fittings and fatigue seals.
- Poor original installation — over-tightened or under-supported joints and fittings.
- Limescale and sludge — restrict flow, drive overheating, and corrode from the inside out.
Leak Symptoms vs Likely Cause
| What You See | Likely Cause | What ROMA Does |
|---|---|---|
| Water dripping from a small pipe to a drain | Pressure-relief valve discharging (high pressure or expansion tank) | Check pressure, test/recharge or replace the expansion tank, replace PRV if failed |
| Steady drip under the pump | Worn circulator seal | Replace the pump or seal, re-pressurise and bleed |
| Damp or staining at a joint | Corroded or loose fitting/union | Remake or replace the fitting |
| Pressure keeps dropping, no visible water | Hidden loop leak or expansion-tank fault | Pressure-test the system to locate the true source |
| Rusty water and a wet boiler body | Heat-exchanger corrosion | Assess severity, give honest repair-vs-replace advice |
What to Do Before We Arrive
- Turn the boiler off at the service switch.
- If water is actively running, close the cold-water fill/isolation valve to the boiler if you can reach it safely.
- Place a towel or container to catch the drip and protect the floor.
- Note the system pressure on the gauge and whether it is dropping.
- If you smell gas as well, leave the unit off and call immediately — do not switch anything electrical on or off.
How ROMA Repairs Boiler Leaks
Finding the real source is most of the job, because water often travels before it pools. Our process is:
- Pressure-test the system to separate a true leak from an expansion-tank or fill-valve fault.
- Trace the leak to its origin, not just the spot where it collects.
- Confirm the component — valve, seal, fitting, expansion vessel, or heat exchanger.
- Repair with genuine parts carried on the truck, so most leaks are fixed the same visit.
- Re-pressurise and bleed the system to about 1.5 bar and clear trapped air.
- Verify no further loss by re-checking pressure and the repaired point before we leave.
Where the leak is at the heat exchanger of an older boiler, we give you a clear, honest repair-versus-replace comparison — including whether a high-efficiency replacement could qualify for FortisBC/CleanBC rebates — so you can make the call with the full picture.
Same-Day Emergency Boiler Leak Repair Across Metro Vancouver
An active boiler leak can damage your home quickly, so it should not wait. ROMA offers same-day emergency boiler service across Greater Vancouver — Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Moody, and Langley. If your boiler is leaking or losing pressure, call (604) 704-0300 and we will dispatch a gas-licensed technician to find the source and stop the loss.
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?
A small, slow drip should be looked at within a day or two, but active leaking is urgent: water around a boiler can damage the heat exchanger, short out electrical controls, corrode the gas valve, and rot the surrounding structure. If water is pooling or running, turn the boiler off, close the water supply to it if you can, and call for service. Never ignore a leak combined with a gas smell — turn the unit off and call right away.
Why is my boiler losing pressure but I can’t see a leak?
Not every leak is visible. Water can escape through a weeping pressure-relief valve into a drain, evaporate off a hot pipe before it pools, or hide inside a wall or under a floor on a hydronic loop. A waterlogged expansion vessel can also mimic a leak by causing pressure to swing and the relief valve to discharge. We pressure-test the system to tell a true leak from an expansion-tank fault.
Where do boilers most commonly leak?
The most common points are the pressure-relief (PRV) valve, the pump or circulator seal, corroded pipe fittings and unions, the auto air vent, the expansion tank connection, and — most seriously — the heat exchanger itself. The location matters: a fitting or valve is a straightforward repair, while a leaking heat exchanger on an older boiler often tips the decision toward replacement.
Can a leaking boiler be repaired, or does it need replacing?
Most boiler leaks are repairs — replacing a valve, seal, fitting, or expansion tank restores the unit. Replacement only becomes the better option when the leak is in the heat exchanger or main body of an older boiler, where the cost of the part approaches the value of the appliance. We always diagnose the source first and give you an honest repair-versus-replace comparison before any work begins.
How does ROMA find and fix a boiler leak?
We pressure-test the system, trace the leak to its true source rather than the spot where water collects, and confirm whether it is a valve, seal, fitting, expansion vessel, or the heat exchanger. We carry common parts on the truck so most leaks are repaired the same visit, then we re-pressurise, bleed the system, and verify there is no further loss before we leave.
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.
What Greater Vancouver Homeowners Say
“Nelson worked hard to get the NTI unit fixed. He was always polite, courteous and on time.”
“As always Nelson was super efficient. Showed up on time and was quick to work. I had a full maintenance done on the fireplaces and furnace. He was awesome. I won’t use anyone else.”
“Excellent service. Andy had a spare Carrier inducer with him which saved us time.”
“Was very prompt to respond to our issues. Technician was scheduled for the day following my initial call.”
“Very professional heating company. Price is reasonable, excellent work.”
“Highly recommend this company. It was a pleasure dealing with Shawn and Nelson.”
“Professional and courteous technicians with attention to detail and customer needs.”
“Always great, friendly service. Serviced the hot water on-demand system. Honest and informative. Thanks!”
“Speedy response time, honest, and professional service from start to finish.”
Why Greater Vancouver Trusts ROMA Heating & Cooling
ROMA Heating & Cooling has installed, repaired and maintained heating and cooling systems across Metro Vancouver since 1999. Our team are TSBC-licensed gas fitters (Gas LGA0202903) and Red Seal-trained technicians — licensed, bonded and insured — and we back every job with upfront, flat-rate pricing and a 100% satisfaction guarantee. We hold a 4.8★ rating from 221+ Google reviews.
- Authorized for 30+ brands (Lennox, Carrier, Viessmann, Navien, Rheem & more)
- Upfront flat-rate pricing — no overtime or hidden fees
- Free, no-obligation estimates on new installations
- Locally owned & operated in Burnaby, BC
No Hidden Fees
Our service rates are transparent and easy to understand. You approve upfront, flat-rate pricing before we start — so you never get a bill you didn’t expect.
Licensed & Bonded
ROMA is a TSBC-licensed gas contractor (Gas LGA0202903). Our technicians are bonded, insured and Red Seal-trained — qualified for any heating or cooling system.
Free Estimates
We offer free, no-obligation estimates on new installations — furnaces, boilers, heat pumps, air conditioners, tankless and hot-water tanks.
ROMA Heating & Cooling is a trusted HVAC contractor serving Metro Vancouver since 1999. We specialize in furnace repair, heat pump installation, boiler services, air conditioning, and emergency heating solutions for residential, commercial, and government clients. Available 24/7, our certified technicians deliver fast, reliable, and affordable HVAC services across Greater Vancouver.