How to Tell When Your Water Heater Needs to Be Replaced

Most water heaters last between 8 and 12 years with regular maintenance. Once yours gets past the 10-year mark, it's worth paying close attention — because a water heater that fails without warning can mean cold showers, water damage, and an emergency call on a Saturday morning.

Warning Signs It's Time to Replace

• Age: If your unit is 10 or more years old, check the serial number. On most brands, the first two digits indicate the year of manufacture. If you're not sure, call us and we'll help you decode it.
• Rusty hot water: If the hot water at your tap has a reddish or brown tint, the interior of the tank may be corroding. Once a tank starts rusting from the inside, there's no repair — it needs to come out.
• Rumbling or popping sounds: Sediment builds up at the bottom of the tank over years of use. When the burner heats through that layer, you'll hear knocking or rumbling. Sediment also reduces efficiency and accelerates wear on the heating element.
• Visible rust or corrosion on the tank body, around the pressure relief valve, or at the fittings.
• Moisture or puddles around the base — even a slow seep usually means the tank itself has begun to fail, not just a fitting or valve.

Tank vs. Tankless: What's Right for Your Home?

If you're replacing an older tank-style unit, it's worth considering whether a tankless water heater makes sense for your household. Tankless units heat water on demand — there's no standing tank losing heat around the clock — and they typically last 20 or more years. The upfront cost is higher, and some homes need a gas line upgrade or electrical work to support them, but the long-term savings and extended lifespan often make up for it.

For most families of three or more in Southern New Hampshire, a 50-gallon tank is the standard replacement. A good plumber will size the unit to your actual hot water demand — number of bathrooms, occupants, and how you use hot water — rather than just swapping in whatever was there before.

When to Call

If your water heater is leaking, producing discolored water, making unusual sounds, or more than 12 years old, it's time to have it looked at. We'll tell you honestly whether repair makes sense or if replacement is the smarter move — no pressure, straight answer.