A slow drip at the tank's drain valve is a common, fixable issue — here is what it costs to replace in Port Coquitlam.
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Quick answer
In Port Coquitlam, replacing a water heater's drain valve typically falls in the $150-$650 general repair range for gas storage tanks, plus the standard $90-$150 diagnostic visit. This is a ballpark based on 2026 public market data, not a quote — CANRO's certified technicians confirm the real number once they have inspected the valve and the tank fitting it threads into.
Need a licensed gas fitter for your tank water heater? Call CANRO at (604) 359-1081 — residential natural-gas heating and hot water across Metro Vancouver since 1999.
The drain valve sits near the bottom of the tank and exists so the water heater can be drained for maintenance, sediment flushing, or eventual removal. Many residential tanks come from the factory with an inexpensive plastic drain valve, which is one of the more common points of failure on an otherwise sound tank.
A drain valve typically fails by developing a slow drip that never fully stops, or by cracking outright if it is ever opened after years of sitting untouched and mineral deposits have built up around the seat. Either way, a leaking drain valve on an otherwise healthy tank is a genuine repair, not necessarily a sign the tank itself is failing.
| Item | Typical range |
|---|---|
| Diagnostic / service call | $90-$150 (often credited toward the repair) |
| Drain valve repair, parts and labour | $150-$650 |
| Technician labour rate | $95-$165 per hour |
Swapping a plastic drain valve for a proper brass ball valve on an accessible tank is typically toward the lower end of that range. If the tank needs to be fully drained and the fitting has corroded or seized into the tank's threaded boss, the job runs higher. These are 2026 public-market ballparks, not a specific quote for your tank.
A leaking drain valve on a tank that is otherwise in good shape is a straightforward, worthwhile repair, and it is a good opportunity to upgrade to a more durable brass valve so the same failure is less likely to recur.
If the leak is actually coming from the tank body itself rather than the valve — which a technician checks carefully, since the two can look similar from a quick glance — that changes the conversation entirely, since a leaking tank body means the unit is at the end of its service life and replacement, not repair, is the honest recommendation.
Port Coquitlam has a meaningful number of homes with basement suites, and that extra household hot water demand means tanks in those properties see more draw cycles than a single-family home without a suite, which can accelerate wear on components like the drain valve over the tank's lifetime.
Because much of the city, along with the rest of Metro Vancouver, is on the regional treated water supply rather than well water, sediment buildup at the tank bottom tends to be more moderate than in harder-water communities, though it is still enough over years of use to make the drain valve a routine point of attention during any service visit.
Safety note
Drain valve service is on the water side of the tank, but if you ever notice a gas smell near the water heater at any point, leave the house and call FortisBC at 1-800-663-9911. Work on a gas-fired water heater should be carried out by a Technical Safety BC licensed gas fitter — CANRO holds gas licence LGA0043870 and boiler licence LBP0046450.
Plastic drain valves are a common factory-installed part that wear over time, and a slow drip is the typical first sign, especially on a tank that has been in service for several years.
A gentle check that it is fully closed is fine, but forcing an old plastic valve can crack it further, so if a light check does not stop the drip, it is best to have it assessed rather than keep tightening.
Not necessarily, and it matters which one it is — a valve is a simple, inexpensive repair, while a leak from the tank body itself means the unit needs to be replaced. A technician can tell the difference quickly.
Many technicians recommend it since brass ball valves tend to hold up better over time than the plastic valves often installed at the factory, and it is a small added cost during a repair that is already underway.
Occasional flushing to remove sediment is generally good practice, though how often depends on your water conditions and tank age — ask CANRO what makes sense for your specific setup.
Yes, since the valve sits at the lowest point of the tank, the water above it needs to be drained down before the valve can be safely removed and replaced.
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