Did the old heater keep up?
If it did, a tank with the same fuel and a similar first-hour rating is the simplest swap. If hot water ran short, our tank water heater page explains first-hour rating and recovery before you pick a bigger size.
Sized for how you use hot water
Water Heater Replacement and Installation
Replace a tank like for like, move up a size, or switch to tankless or a heat pump. We size the new heater to your household or business, plan the gas or electrical, venting, and drain details, and give you a written price before work begins.
Watch for these signs
Signs it is time to replace
- Water is coming through the tank wall or bottom
- Rust in the hot water from a corroding tank
- The heater is more than 10 years old and needs a major part
- Hot water no longer keeps up with the household or business
- You want to switch fuel, go tankless, or move to a heat-pump model
Our services
What a replacement includes
- A size check against how the property uses hot water now
- A check of the shutoff valve, connectors, and gas or electrical supply
- Temperature and pressure relief valve and its discharge pipe
- Drain pan and thermal expansion control where the location or system calls for them
- Venting for gas heaters, and condensate drainage where the heater needs it
- Startup, a temperature check, and a walkthrough of the new heater's controls
Your options
Like for like, or a change?
Most replacement decisions come down to three questions about the heater you have now.
Same fuel, or a switch?
Gas to electric, tank to tankless, or a move to a heat pump each changes the gas line, circuit, venting, or drain work, so the installation is planned along with the heater.
Does the space still fit?
The closet, garage, or attic, the vent route, and a nearby drain decide whether the new heater can sit where the old one did.
Around the Valley
Plan for hard water from day one
Valley water leaves scale in tanks and tankless heat exchangers. Ask how the new heater should be flushed or descaled, and whether a softener or scale filter is worth adding for your water.
Planning the work
What affects the price
- Heater type, capacity, and efficiency
- Changes to gas piping, wiring, or venting
- Drain pan, expansion control, and relief-valve discharge work
- Access to the closet, garage, attic, or roof location
- Switching from a tank to tankless or a heat pump
Planning a tank replacement budget
Our home page lists budget ranges for standard and 75-gallon tank replacements, rounded from paid past jobs. They are planning ranges, not fixed offers, and some installations cost more.
Tankless, heat-pump, and commercial systems are quoted separately because the gas, electrical, and venting work varies so much. Whatever you choose, we confirm the full price in writing before work begins.
Switching from a tank to tankless
A tankless conversion is a system change, not a different-shaped heater. A gas unit can need a larger gas line and new venting, and a condensing model needs a condensate drain. An electric whole-home unit can need several large circuits and more panel capacity than the old tank used.
Compare a tankless unit with a correctly sized tank before paying for those upgrades. Permit rules depend on your city and on what changes. Mesa, for example, publishes which water heater replacements need a permit (see Sources below).
Code items in a water heater replacement
Your city's adopted plumbing code governs, and we confirm what applies at your address. Phoenix, for example, adopted its 2024 Building Construction Code effective August 1, 2025, and other Valley cities adopt their own editions. These are the items a replacement is checked against, as Phoenix's 2024 residential code words them:
- A temperature and pressure relief valve whose discharge pipe runs full size, by gravity, to a place you can see
- A drain pan where a leak from the tank would damage the building
- Thermal expansion control where a check valve, backflow preventer, or pressure-reducing valve closes the system
- In a garage, a gas heater's ignition source raised at least 18 inches above the floor, unless the heater is listed as flammable-vapor ignition-resistant
- The manufacturer's installation and venting instructions
What happens next
A straightforward service process
- 1
Send a photo of the old heater's label, the fuel, and where it sits, and tell us how the property uses hot water.
- 2
We size the replacement and check the gas or electrical supply, venting, drain, and space.
- 3
You get a written price for the heater and the installation before work begins.
- 4
We install and start the new heater, then test the temperature, the relief valve, and every connection for leaks.
Common questions
Before you schedule
How much does a tank water heater replacement cost in the Phoenix Valley?
Our standard and 75-gallon tank ranges are published on our home page. They come from paid past jobs and are not fixed offers. Your price depends on the heater, the access, and any gas, electrical, or venting changes, and we confirm it in writing before work begins. Tankless, heat-pump, and commercial systems are quoted separately.
Can I replace a gas water heater with an electric one?
Yes, if the panel has room for a dedicated circuit sized for the new heater. The old gas line is capped and the vent is removed or sealed. Compare operating costs and recovery before switching.
Is tankless worth it when my tank fails?
It can be when you have long hot-water runs, limited space, or back-to-back showers, and the gas line, circuit, and venting can support it. A failed tank is a good moment to compare, but a like-for-like tank is the simpler path.
Can my water heater be replaced the same day?
Same-day replacement is often available, depending on the job. Tell us the fuel, the tank size, and where the heater sits, and send a photo of the label, so we can confirm what the replacement involves.
Do you install heat-pump water heaters?
Yes, where the space works. ENERGY STAR notes that manufacturers typically require 450 or 700 cubic feet of free air around the heater, and the condensate needs a drain.
Related services
Related services and guides
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