Hot Water Tank Repair vs. Replacement: A Guide for Calgary Homeowners

By Benner Plumbing Staff | November 20, 2025

A reliable hot water tank is essential for everyday comfort—whether you’re showering, doing dishes, or running your laundry. But like any appliance, water heaters don’t last forever. Many Calgary homeowners struggle with the same question: Do I repair my hot water tank, or is it time to replace it?

Knowing when to replace a hot water tank versus when a simple repair will do can save you money, prevent unexpected breakdowns, and reduce the risk of leaks and water damage. This guide explains the warning signs, repair options, and how to make the right decision for your home.

How Long Do Hot Water Tanks Last?

The average hot water tank lasts 8 to 12 years, depending on:

  • Water quality (Calgary’s hard water can shorten lifespan)

  • Maintenance frequency

  • Installation quality

  • Brand and tank type

If your tank is approaching the 10-year mark, it’s essential to closely monitor performance changes as these often signal that it’s time to plan for a replacement.

Signs You Can Repair (Not Replace) Your Hot Water Tank

Some issues are minor and can be fixed quickly by a certified technician. Repairs are often possible when:

🔧 1. The Pilot Light Keeps Going Out

A faulty thermocouple or gas valve typically causes this—both are repairable.

🔧 2. Inconsistent or Not Enough Hot Water

This may be due to a broken heating element, a thermostat issue, or sediment buildup that can be flushed out.

🔧 3. Strange Noises From the Tank

Rumbling or popping sounds usually indicate sediment buildup. A professional flush can restore performance.

🔧 4. Mild Leaks at Fittings or Valves

Loose connections, pressure relief valves, or drain valves can be repaired without replacing the entire unit.

If the unit is under 8 years old, repairs are often the more cost-effective solution.

Signs It’s Time to Replace Your Hot Water Tank

Understanding when to replace a hot water tank can help avoid emergencies or flooding. You should consider replacement if you notice:

❗ 1. Your Tank Is 10+ Years Old

Age is the most reliable sign. Older tanks are more prone to leaks, corrosion, and inefficiency.

❗ 2. Visible Rust or Corrosion

If rust is present on the tank itself—especially at the base—replacement is the safest option.

❗ 3. Water Around the Base of the Tank

This usually indicates internal tank failure, which cannot be repaired.

❗ 4. Brown or Rust-Colored Hot Water

This is a sign of corrosion inside the tank, indicating a breakdown is imminent.

❗ 5. Loud Banging or Knocking Sounds

Severe sediment buildup inside an aging tank can cause overheating and internal damage.

❗ 6. Your Unit No Longer Meets Your Household Needs

If your family has grown or your usage has changed, upgrading to a larger or tankless unit improves efficiency and comfort.

Repair vs. Replacement: How to Decide

Here’s a quick comparison to help Calgary homeowners choose the right option:

General rule:
If repairs cost 50% or more of the cost of a new water heater, replacement is typically the smarter long-term decision.

Calgary’s Hard Water: Why It Matters

Calgary homes have hard water, which speeds up sediment accumulation inside tanks. This can shorten lifespan and reduce efficiency. Annual maintenance—such as flushing the tank—helps extend the unit’s life and minimize the frequency of repair.

Benner Plumbing recommends a yearly inspection to catch issues before they lead to costly damage.

When to Replace a Hot Water Tank with a Tankless System

If you’re replacing your tank, consider upgrading to a tankless water heater. These systems:

  • Provide unlimited hot water

  • Use less energy

  • Last up to 20 years

  • Save space

  • Offer long-term cost savings

Tankless units are ideal for families, large households, or anyone wanting improved efficiency.

Trust Benner Plumbing for Hot Water Tank Repair & Replacement in Calgary

If you’re unsure when to replace your hot water tank, Benner Plumbing can help. Our certified technicians provide honest recommendations, expert repairs, and professional installation for all types of water heaters—including gas, electric, tankless, and on-demand systems.

Choose Quality: Our Trusted Hot Water Heater Brands

When it’s time to replace your hot water tank, Benner Plumbing offers a selection of top-quality, energy-efficient models from leading manufacturers known for their reliability and performance. We proudly install:

  • Bradford White Water Heaters: Renowned for their durable construction and long-standing reputation for quality in conventional tank-style water heaters.

  • Navien Water Heaters: Leaders in condensing technology, offering high-efficiency tankless and combi-boilers for endless hot water and space heating.

  • Rheem Water Heaters: A trusted name providing a wide range of conventional and tankless water heaters known for innovation and performance.

Our licensed plumbers will help you choose the best type and brand of water heater to meet your household’s demands and maximize energy savings. We proudly serve Calgary, Cochrane, Airdrie, Okotoks, and Chestermere, with 24-hour emergency service and a fleet of fully stocked trucks ready to assist at any time.

Contact Benner Plumbing Today

📞 Call us to schedule a hot water tank inspection, repair, or replacement.
Benner Plumbing — Calgary’s trusted experts in plumbing, heating, and water heater services.

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