How to Maintain Your Hot Water Tank and Extend Its Life

Why Water Heater Maintenance Pays for Itself

A standard tank water heater costs between $1,500 and $3,000 to replace in Vancouver. Yet most homeowners never perform a single maintenance task on their unit — and wonder why it fails after eight years instead of lasting twelve or more. The good news is that a few simple annual tasks can meaningfully extend the life of your water heater, improve its efficiency, and help you catch developing problems before they become expensive emergencies.

As Vancouver's trusted hot water tank specialists, HYDROPRO shares the exact maintenance routine we recommend to every homeowner in Metro Vancouver.

1. Flush the Tank Annually to Remove Sediment

Sediment — a combination of minerals, scale, and debris — settles on the bottom of your water heater tank over time. This layer acts as insulation between the burner or heating element and the water, forcing the unit to work harder to achieve the same result. The outcome is higher energy bills, more wear on components, and a shortened lifespan.

Annual flushing removes this buildup before it becomes a serious problem. To flush your tank, attach a garden hose to the drain valve at the base of the unit, turn off the cold water supply, and allow several litres of water to drain until the water runs clear. Always follow your manufacturer's instructions, as the process varies slightly between models.

In Metro Vancouver, the municipal water supply is relatively soft, which means mineral buildup is less aggressive than in cities with hard water. Even so, sediment still accumulates with daily use and annual flushing remains important for any tank over three years old.

2. Inspect and Replace the Anode Rod

The anode rod is arguably the most important — and most overlooked — component inside your water heater. This metal rod, typically made of magnesium or aluminium, is inserted directly into the tank where it attracts corrosive elements in the water through a process called electrochemical reaction. In simple terms: the rod corrodes so the tank doesn't.

Once the anode rod is fully depleted, your tank's steel lining becomes the next target for corrosion. At that point, the tank typically fails within one to three years. Anode rods should be inspected every three to five years and replaced when more than half depleted.

This is a task best handled by a professional, as the rod can be difficult to access and requires the right tools. HYDROPRO includes anode rod inspection in our water heater maintenance service.

3. Test the Temperature and Pressure Relief Valve

The temperature and pressure relief (T&P) valve is a critical safety device. If pressure or temperature inside the tank rises to unsafe levels, the valve opens automatically to release water and prevent a catastrophic failure. A valve that is stuck open — or worse, stuck closed — represents a serious safety hazard.

Once a year, briefly lift the lever on the T&P valve and let it snap back. You should hear a gurgling sound as a small amount of hot water is released into the drain tube. If no water comes out, or if the valve continues to drip after the test, it needs to be replaced immediately.

On units older than five years, have a licensed plumber perform this test. Older valves can sometimes fail to reseat properly after testing and require replacement on the spot.

4. Insulate the Tank and Hot Water Pipes

Standby heat loss — the energy your water heater uses simply to keep stored water hot while you're not using it — accounts for a meaningful portion of your energy bill. Wrapping your tank in an insulating blanket rated for water heaters can reduce standby heat loss by 25 to 45 percent, according to Natural Resources Canada.

Similarly, insulating the first 1.5 metres of hot water pipe leaving the tank reduces heat loss in the lines and delivers slightly hotter water to your fixtures faster. Both products are inexpensive and available at any hardware store in the Lower Mainland.

Important note: Do not insulate directly over the thermostat, T&P valve, or any gas combustion air inlets. Follow the insulation blanket manufacturer's instructions carefully.

5. Set the Temperature to 120°F (49°C)

The default factory setting on many water heaters is 140°F (60°C), which is unnecessarily high for most households. Lowering your thermostat to 120°F (49°C) accomplishes three things: it reduces the risk of scalding, it lowers standby heat loss, and it slows mineral buildup and corrosion inside the tank.

BC Hydro and FortisBC both recommend 120°F as the optimal setting for household use. At this temperature, hot water is still plenty hot for showers, dishwashers, and laundry, but the tank doesn't have to work as hard to maintain it. You'll see the difference in your monthly utility bill.

6. Check for Leaks and Moisture Regularly

Make it a habit to visually inspect the area around your water heater every few months. Look for water stains, mineral deposits (white or rust-coloured crust), or any pooling on the floor. Check the connections at the cold water inlet and hot water outlet, the T&P valve discharge pipe, and the drain valve.

Catching a small drip from a fitting early can prevent it from becoming a major leak that floods your utility room. Even a slow, ongoing drip can cause significant water damage to subflooring over time. If you notice any moisture you can't immediately explain, contact a professional for leak detection and repair.

When to Call a Professional

While homeowners can perform some of these tasks themselves, several require professional tools or carry safety risks that make professional service the wiser choice. Call HYDROPRO if you encounter any of the following:

• The T&P valve doesn't release water during testing, or won't stop dripping after
• You notice rust-coloured or discoloured hot water
• The anode rod is difficult to access or appears heavily corroded
• Your gas-powered unit has unusual odours near the burner
• Your tank is over 10 years old and showing any signs of wear

For non-emergency maintenance questions or to schedule a water heater inspection, call HYDROPRO at 604-652-4356. For urgent issues, our 24/7 emergency plumbing service is always available across Greater Vancouver.

Frequently Asked Questions

How often should I flush my water heater?

You should flush your water heater at least once a year to remove sediment buildup. If your home has older pipes or your water has a higher mineral content, flushing every six months is better practice. Regular flushing improves efficiency and extends the life of the tank significantly.

What is an anode rod and why does it matter?

An anode rod is a metal rod — usually made of magnesium or aluminium — that is inserted into your water heater tank to attract corrosive elements in the water. This process, called sacrificial protection, causes the rod to corrode instead of the steel tank. Once the rod is fully depleted, the tank itself begins to corrode rapidly. Anode rods should be inspected every 3 to 5 years and replaced when depleted.

When should I call a professional for water heater maintenance?

Call a professional if you notice rusty water, unusual noises, inconsistent temperature, or any moisture around the unit. You should also call a licensed plumber for anode rod inspection and replacement, T&P valve testing on older units, and any concerns about gas line connections. HYDROPRO provides professional water heater maintenance across Greater Vancouver. Call 604-652-4356 to book a service visit.