Water Heater Replacement
Replacement makes sense when the tank leaks, when it's around 10 years or older and needs a major repair, or when it can't keep up with your household. Most standard tanks are replaced in a few hours.
What a new water heater costs
| Situation | Usual cause | Typical cost |
|---|---|---|
| Gas tank, 40 to 50 gallon | Like-for-like swap, haul-away | $1,000 to $2,000 |
| Electric tank, 40 to 50 gallon | Like-for-like swap, haul-away | $850 to $1,800 |
| Tankless gas | Often needs larger gas line and new venting | $2,000 to $5,000 |
| Heat pump water heater | Needs space and a nearby drain; rebates often apply | $2,500 to $4,500 |
National ranges from published cost guides. Your plumber quotes your job after seeing the heater.
Water Heater Replacement, explained
Repair or replace?
A good rule: if the heater is over 10 years old and the repair costs more than about half the price of a new one, replace it. A leaking tank is always a replacement.
Choosing the right size
A 40 gallon tank suits most 2 to 3 person homes. Larger families or homes with big tubs often need 50 gallons or more, or a tankless unit sized by flow rate.
What happens on install day
The old heater is drained and disconnected, the new one is set, connected and vented to code, then filled and tested. Many towns require a permit for a water heater replacement, which the installer handles.
Do this first
- Find the label on the tank and note the size in gallons and the fuel type.
- Note the age. The serial number often encodes the year.
- Measure the space if it's in a closet or tight corner.
- Ask about rebates from your utility for high-efficiency units.
Related water heater services
Water Heater Repair
Gas, electric and tankless repairs, from pilot lights to heating elements.
Learn more
Leaking Water Heater
Water around the tank or a dripping relief valve. Act before it floods.
Learn more
Tankless Water Heater Repair
Error codes, lukewarm water and scale buildup on tankless units.
Learn moreWater Heater Replacement questions
How long does a water heater replacement take?
A like-for-like tank swap usually takes 2 to 4 hours. Switching to tankless can take a full day.
Is tankless worth it?
Tankless units last longer and never run out, but cost more up front. They make the most sense when you plan to stay in the home for years.
What happens to the old heater?
Most installers haul it away and recycle it. Ask when you get the quote.
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