How long does a water heater actually last here?

The short answer

• Standard tank gas or electric — 8 to 12 years is the normal range. Hard water areas trend toward the low end.
• Tankless — 15 to 20 years, but only if it gets descaled regularly. Skipped descaling cuts that significantly.
• Commercial tanks and boilers — vary widely by load and maintenance; a restaurant water heater works harder than a house one and ages faster.

Much of Bucks and Montgomery County runs hard to very hard water. Scale builds on elements and tank bottoms, forces the heater to work harder, and shortens its life — the reason the "10 to 15 years" number you see online rarely matches what we see in the field.

The signs it is near the end

• Rusty or discolored hot water — the inside of the tank is corroding. Not fixable; it is a when, not if, on replacement.
• Rumbling or popping — heavy sediment has hardened on the bottom. The heater still works, but it is aging fast and running inefficiently.
• Moisture or pooling around the base — the tank is seeping. That is the sign to replace it before it fails completely.
• Running out of hot water faster than it used to — sediment displacing tank volume or failing elements.
• It is 10+ years old and you do not know its service history — at that age you are budgeting, not guessing. Check the serial number — most manufacturers encode the manufacture date.

Repair or replace?

Repair when it is under 6 or 7 years old and the fix is a part — thermostat, element, valve, igniter.

Replace when the tank itself is the problem (leak, corrosion) or the heater is past its decade and the repair cost approaches half the replacement cost. Pouring money into a 12-year-old tank is paying twice.