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How Long Should a Water Heater Last?
A well-maintained water heater in Philadelphia typically lasts 8–12 years for gas and 10–15 for electric. Hard water is the main killer. Here's how to tell where yours stands.
Average lifespan by type
- Atmospheric gas tank: 8–12 years
- Power vent gas tank: 10–13 years
- Standard electric tank: 10–15 years
- Hybrid heat pump: 12–15 years
- Tankless gas (with annual flushing): 15–20 years
What shortens lifespan
- Hard water (sediment buildup at the bottom of the tank)
- Skipping the annual flush
- Anode rod never replaced (it's a sacrificial part — that's the whole point)
- High water pressure (>80 psi)
- Constant on/off cycling from undersizing
Signs yours is on borrowed time
- Rumbling or popping when it heats (sediment)
- Rusty hot water at the tap
- Recovery takes noticeably longer than it used to
- Any moisture under the tank, even occasional
- You're past the warranty period
Replace before it fails
A planned replacement is a few hours and a flat rate. A failed-at-2-AM replacement is the same flat rate plus an emergency fee plus potential water damage. If your unit is past 10 years and showing signs, plan the swap.
⚠ If your tank is past warranty and you're seeing ANY rust at the bottom seam, replacement is months away at most.
How old is yours?
Send us a photo of the label on the side of your tank. We'll tell you the manufacture date and how much life is left.