Pinpoint Where the Water Comes From
Giant is a Canadian-made water heater brand, manufactured in Quebec, and its tanks are installed in homes throughout Greater Vancouver. When a Giant unit leaks, resist the urge to assume the worst. The first and most important step is to identify the exact source of the water, because that determines whether you need a quick repair or a new heater.
Dry off the tank and the floor beneath it, then keep an eye on where moisture returns first. Leaks generally originate at the bottom drain valve, the T&P relief valve and its discharge pipe, the cold and hot water connections on top, or the tank shell itself.
Water always runs downhill and gathers at the lowest spot, so a puddle on the floor is not proof the tank has failed. Follow the moisture upward to the highest dry-to-wet transition, and you will find the real leak.
Why Giant Water Heaters Leak
T&P valve weeping. Giant tanks include this essential safety valve, and it can drip from a worn seat or because temperature or pressure is too high. Metro Vancouver's water pressure can vary enough to cause expansion-related dripping, so the underlying cause should always be checked.
Drain valve leaks. The bottom drain valve may fail to reseal after flushing or loosen over time. This is commonly an inexpensive repair.
Corroded or loose connections. Repeated heating and cooling, plus dissimilar metals at the fittings, can create slow leaks at the top of the unit.
Tank corrosion. Giant tanks use a sacrificial anode rod to slow corrosion of the steel. When the rod wears out, the steel tank eventually perforates and leaks. A leak from the body of the tank cannot be repaired and means the unit must be replaced.
Safe Steps and When to Stop
If your Giant heater is actively leaking, close the cold-water inlet valve on top to stop the tank refilling. On a gas model, turn the gas control to OFF or PILOT; on an electric model, shut off the breaker. These steps make the unit safe to inspect.
Set dry paper towel under each likely leak point and recheck in 30 to 60 minutes to confirm the origin. If a connection is obviously loose, you can gently tighten it, but never force it, because cracking a fitting only makes the leak worse.
The gas valve, burner, and control components should only be serviced by a licensed gas fitter. In British Columbia, certified technicians are legally required for gas appliance work, which protects both your safety and any warranty coverage.
If the leak turns out to be the T&P valve weeping, it is worth having the technician check your home's incoming water pressure at the same time. Across parts of Metro Vancouver, static pressure can sit on the high side, and without a properly working expansion tank or pressure-reducing valve, that pressure repeatedly pushes the T&P valve open. Simply swapping the valve without addressing high pressure often leads to the new one dripping too, so the real fix may involve expansion control rather than the valve alone.
Repair or Replace, and Who to Call
Leaks at valves, the drain, or fittings are usually repairable. A leak from the tank body is not, and once a unit passes roughly 10 years, replacement typically makes more sense than repeated repairs. Many Giant residential tanks carry a limited tank warranty in the range of 6 years, with longer-warranty models available, so check the rating-plate serial for the build date.
In Greater Vancouver, water heaters are serviced by our parent company, CanroHeat. Costs range from a minor valve or fitting repair to a full tank replacement at the upper end, and same-day replacement is often possible. Since each case is different, we give an exact quote only after inspection, so call 604-359-1081.
If you ever detect a gas smell near the heater, do not flip switches or light anything. Leave the home, call FortisBC at 1-800-663-9911 or 911 from outside, then call us at 604-359-1081.