Last updated: May 28, 2026 · CANRO Heating & Cooling, TSBC Class-A licensed since 1999.
Direct Answer
CANRO is an authorized service contractor for Slant/Fin boilers across Metro Vancouver. TSBC Class-A licensed gas fitters, OEM parts in stock, same-day dispatch where possible. Typical Slant/Fin leak repair: $185–$1,400. Heat-exchanger warranty replacement at zero charge if still in coverage. Call (604) 359-1081.
Water leaking from your boiler?
Shut off the water supply. Call CANRO — TSBC-licensed, same-day dispatch where possible.
📞 (604) 359-1081Slant/Fin is one of the most-installed boiler brands across Metro Vancouver — and like every brand, the most common failure mode in years 8+ is a water leak. CANRO services Slant/Fin boilers daily across Vancouver, Burnaby, Surrey, Richmond, North Vancouver, and surrounding cities. Our trucks carry OEM Slant/Fin service parts.
What to do RIGHT NOW if your boiler is leaking
- Shut off the water supply to the boiler (usually a lever or gate valve on the cold inlet).
- Turn off the boiler at its wall switch or breaker.
- Place towels or a bucket to contain the leak.
- If you smell gas: leave — call FortisBC 1-800-663-9911 from outside.
- Call CANRO at (604) 359-1081 for same-day dispatch.
- Take photos of the leak source and any visible damage — speeds up diagnostic.
Common Slant/Fin boiler leak points
- Heat exchanger — Slant/Fin's service-bulletin history is checked at every diagnostic.
- Slant/Fin circulator pump seal — pump-specific OEM seal kit in our trucks.
- Expansion tank — bladder rupture is the #2 cause of Slant/Fin leaks past year 8.
- Auto-air-vent — small but common drip source.
- Pressure relief valve — discharge when expansion-tank pressure is low.
- Condensate trap — Slant/Fin-specific trap part on most condensing models.
- DHW plate heat exchanger (combi models) — scaling failure mode in hard-water areas.
Common boiler leak locations we diagnose and repair
| Leak location | Likely cause | Typical repair |
|---|---|---|
| Heat exchanger (HE) | Corrosion, scale erosion, thermal stress crack | $1,400–$3,800 (or warranty) |
| Pressure relief valve (T&P) | Pressure overshoot, faulty valve | $185–$320 |
| Circulator pump seal | Worn seal, bearing failure | $350–$650 |
| Expansion tank | Bladder rupture, fitting corrosion | $220–$420 |
| Boiler fittings / unions | Thread wear, gasket fatigue, vibration | $185–$420 |
| Condensate trap / drain | Cracked plastic, blocked outlet | $185–$320 |
| Auto air vent | Stuck valve, debris | $145–$240 |
| Domestic hot-water plate (combi) | Scale damage, pinhole leak | $420–$850 |
Slant/Fin warranty considerations
- Heat-exchanger warranty: Slant/Fin typically covers HE 10-15 years (registered installs).
- Parts warranty: 2-5 years on most components.
- CANRO registers every Slant/Fin install in the homeowner name. Call us with your serial number to confirm warranty status.
OEM Slant/Fin parts CANRO stocks
- Circulator pumps and seal kits
- Expansion tanks
- T&P relief valves
- Auto-air vents
- Condensate trap assemblies
- Pressure sensors and switches
- Common gas valves and igniters
How CANRO diagnoses a Slant/Fin leak
How CANRO diagnoses a boiler leak
- Shut-off & safety verification. Water supply isolated. Power confirmed off where required.
- Visual inspection of the boiler cabinet, fittings, and surrounding plumbing.
- Pressure-test isolation. Each loop (heating vs DHW vs primary) isolated to localize the leak.
- Heat exchanger pressure test for hairline cracks (combustion-side leaks).
- Combustion analysis on gas appliances to verify no flue-side condensate damage.
- Written quote with three options when repair vs replace is on the table.
- Repair completed with OEM parts where required.
- 1-year labour warranty issued.
Repair vs replace — the 50% rule
| Scenario | CANRO recommendation |
|---|---|
| Leak from fitting on boiler <6 years old | Repair |
| T&P valve discharging on any boiler | Repair valve, investigate pressure |
| Circulator pump seal leak on boiler <12 years | Repair (replace pump) |
| Heat-exchanger crack on boiler in warranty | Warranty replacement of HE |
| Heat-exchanger crack on boiler 12+ years out of warranty | Replace boiler |
| Multiple small leaks on 15+ year boiler | Replace |
| Repair cost > 50% of replacement cost | Replace |
Common causes of boiler leaks in Metro Vancouver
- Over-pressurization. Expansion-tank failure or fill-valve fault drives system pressure above 30 psi — pressure-relief valve discharges water.
- Corrosion from oxygenated water. Old systems with frequent water top-ups introduce dissolved O₂ that pits steel and copper.
- Scale buildup on heat exchanger. Hard water (some Surrey and Richmond areas) leaves mineral deposits that crack the HE under thermal stress.
- Vibration fatigue on fittings. Decades of pump cycling loosen unions and threaded joints.
- Frozen pipework in unheated spaces. Rare in Vancouver but a real risk for crawlspace runs during cold snaps.
- End-of-life heat exchanger. 15+ years of thermal cycling eventually opens micro-cracks.
- Improper installation. Wrong gas pressure, oversized boiler short-cycling, or missing isolation valves all shorten component life.
Cities we service Slant/Fin boiler leaks in
Vancouver, Burnaby, Surrey, Richmond, North Vancouver, West Vancouver, Coquitlam, Port Coquitlam, Port Moody, New Westminster, Delta, Langley, Maple Ridge, Pitt Meadows, White Rock, Anmore, Belcarra.
Slant/Fin Boiler Leak Repair
Call (604) 359-1081 for same-day diagnostic. TSBC-licensed. OEM Slant/Fin parts in truck.
📞 (604) 359-1081 Request a quoteFrequently asked questions
Q: How fast can CANRO repair a Slant/Fin leak in Metro Vancouver?
A: Most leaks diagnosed and repaired on the same visit. Common parts in truck. OEM-specific parts sourced from local depots within 2-24 hours.
Q: Is my Slant/Fin still under warranty?
A: Slant/Fin typically covers heat exchanger 10-15 years and parts 2-5 years on registered installs. CANRO checks warranty status during onsite diagnostic.
Q: What if my Slant/Fin heat exchanger is cracked?
A: If under warranty: $300-$600 labour, HE part covered by manufacturer. Out of warranty: $1,400-$3,800 — boiler replacement often makes more sense at this point.
Q: Does CANRO carry Slant/Fin parts?
A: Yes — common Slant/Fin service parts in every truck (pumps, expansion tanks, igniters, gas valves). Specialty parts via OEM depots in 2-24 hours.
Q: Will the repair be warrantied?
A: 1-year labour warranty on every CANRO repair plus manufacturer parts warranty.
Q: Should I repair or replace?
A: Depends on age and repair cost. CANRO’s 50% rule: if repair exceeds 50% of replacement cost AND boiler is past lifespan midpoint, replace. We provide written recommendations.
About CANRO
CANRO Heating & Cooling is a Burnaby-based HVAC and gas-fitting company serving Metro Vancouver since 1999. TSBC Class-A gas-fitting licence. Red Seal HVAC technicians. WorkSafeBC registered. 4.9★ rating across 85+ verified Google reviews. Authorized service contractor for Navien, NTI, IBC, Viessmann, Triangle Tube, Laars, Weil-McLain, Burnham, Slant/Fin, Baxi, Lochinvar, Raypak, Bosch, Lennox, Carrier, Rheem, Bradford White, Bryant, Trane, and Vaillant.
CANRO Heating & Cooling — TSBC Class-A gas-fitting licence · Red Seal HVAC certified · WorkSafeBC and liability insured · 4.9★ from 85+ Google reviews · Serving Metro Vancouver since 1999.
