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Mesa, Arizona

Water Heater Installation in Mesa, AZ

Once replacement is the plan, the next questions are what to install and what the work involves. Trident takes Mesa homes and businesses from the current heater to a tested new system.

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Woman, Veteran, & Family Owned

A tankless water heater on a garage wall above a platform, with an Encore treatment tank beside it
Trident at workA tankless water heater with water treatment equipment nearby.

Licensed in ArizonaROC 331536

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North Phoenix officeServing Mesa

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From old unit to working system

Planning a water heater installation

Trident Plumbing & Drain handles water heater installation for residential and commercial properties, from conventional tanks to tankless, hybrid and Marathon units. The work follows a clear order: review what is installed now, agree on the equipment and scope, take out the old unit, then fit and test the new one.

Arrange the visit through our North Phoenix office. If you are still unsure whether the current heater can be repaired, start with the Mesa water heater repair page, which covers diagnosis. The steps below assume a new heater is already on the table.

On the job: water heater connections. Silent footage from Trident's project library.

Step one

Begin with the heater you have now

An electric tank water heater installed on a shelf in a mechanical space with copper and PVC piping
An electric tank water heater in a mechanical space.

The installation discussion starts with the existing heater and where it sits. Its fuel type, location and connections tell the plumber what the new equipment has to work with, and what might need to change if you choose a different kind of system.

Share what prompted the replacement, whether that is a run of repairs, a supply that falls short, visible wear on the tank or a planned upgrade. Each reason points the equipment conversation in a different direction, so it helps to be specific.

Step two

Agree on the equipment and the work it needs

A gas tank water heater against a garage wall with copper and gas connections
A gas tank water heater installation.

Hot water demand, fuel or electrical supply and available space narrow the options. Each heater type comes with its own installation requirements, so the choice should come from the property and how it uses hot water rather than from what happened to be there before.

If you are switching to another kind of heater, the job may extend beyond the unit itself. Ask what the selected system requires and how it affects the current setup, so the agreed scope describes the whole job before anything is scheduled.

Step three

Removal, installation and testing

An older tank water heater with corrosion around its base and drain pan
An older tank water heater showing corrosion at the base.

With the system and scope agreed, Trident removes the old heater, installs the replacement and ties it into the existing plumbing and utility connections as the selected model requires. The work follows what was reviewed during planning.

Testing operation is part of the job, not an optional extra. Ask what was checked and how the new heater performed, so you know what normal operation looks like when you start relying on it.

Step four

What to understand at handover

A tankless water heater connected to a bucket and service hoses for maintenance
A tankless heater connected for maintenance.

After installation, Trident explains how to operate the new heater and the maintenance it needs. A tank, tankless unit and hybrid system do not share one care routine, so ask what applies to the model you chose.

Store the model number and the product documents alongside the installation details. Those records make later maintenance or troubleshooting easier and give any future service visit an accurate starting point.

Plan with the City

Permits, gas service and the City rebate

The City draws a clear line on permits. A like-for-like residential replacement of a gas or electric heater with equal or lesser rating needs no permit, while replacing a gas storage tank with a tankless or on-demand gas unit does. Before any gas appliance goes into service, the serving gas utility has to be notified. In Mesa that may be the City's own gas utility or Southwest Gas, and the name on your gas bill tells you which. Adding gas appliances can also require a larger meter or an excess flow valve.

If your gas comes from the City, a new tank-style gas water heater of at least 30 gallons can qualify for a City bill credit. The heater must be new, bought by the homeowner, installed and working, and the application is due within six months of purchase; the account needs its own meter. For permitted work, the City's plumbing checklist under the 2024 codes lists a safe pan and drain line, temperature and pressure relief line termination and thermal expansion control.

Installation quotes

How a new water heater quote comes together

An installation quote covers the heater and the work to connect it safely. Compare these items across quotes.

You can compare GreenSky® financing plans with our team. If you plan to apply for the City's gas water heater rebate, keep the receipt showing where and when you bought the heater, its total BTU and its efficiency rating.

  • A like-for-like swap or a change to tankless, hybrid or another fuel.
  • Tank size or tankless flow rate for your household.
  • Gas line, venting, electrical or condensate work the new unit needs.
  • A larger gas meter or excess flow valve, if the gas utility requires one.
  • A City permit when the job is not like-for-like.

Install rules

Mesa rules for a new water heater

City permit rules, gas service and a City rebate all shape a new installation.

Like-for-like home water heater replacement
No permit

Replacing a gas or electric heater with a like-for-like model of equal or lesser rating needs no City permit.

Source: City of Mesa, Residential Construction FAQ (opens in a new tab)
Gas tank heater swapped for a tankless gas unit
Permit

Moving from a gas storage heater to a tankless or on-demand gas unit does need a permit, and the gas utility must be notified before it goes into service.

Source: City of Mesa, Residential Construction FAQ (opens in a new tab)
City bill credit on a new gas tank water heater
Rebate

City gas customers with an individual meter can apply for a bill credit on a new tank-style gas water heater of 30 gallons or more. Southwest Gas customers are not eligible.

Source: City of Mesa, Natural Gas Appliance Rebate (opens in a new tab)

Your local team

Here for your
Mesa home.

Our North Phoenix office serves Mesa. Call about your address, tell us what needs attention, and we'll help you arrange service.

Explore Mesa on the map (opens in a new tab)
Mesa, ArizonaLocal service
Mesa and Trident's North Phoenix office Major roads near Mesa, with separate markers for the city location and the North Phoenix office that serves it. Fountain HillsParadise ValleyScottsdale
City locationTrident office
Roads © OpenStreetMap (opens in a new tab) contributors. Locations: U.S. Census Bureau.

Your North Phoenix team

Plan your new water heater

Tell our North Phoenix office about the current heater at your Mesa property, what prompted the change and any system you have in mind.

North Phoenix office
1506 W Whispering Wind Dr #110
Phoenix, AZ 85085
Office directions (opens in a new tab)Send a service request

Trident memberships

Yearly care, 10% off repairs.

  • Preventative maintenanceOne year: water heater flush, whole-home inspection, 10% off plumbing services, waived emergency fee
  • Salt serviceOne year: softener salt added every 6–8 weeks
  • Reverse osmosisFive years: annual filter changes; sanitizing not included

Ask our North Phoenix team for current pricing.

From a Trident customer

Good work.
Real experiences.

Read more customer stories
The Trident team standing together in front of their purple and gold service vans
The Trident team from our North Phoenix office.
Our 12 year old water heater was leaking. I called and spoke with Shelby who was able to dispatch a technician immediately, same day… Tyler arrived on time, worked efficiently and cleaned up after himself.
Amber E.Peoria Google review ·

Answers before you book

Questions about
water heater installation in Mesa.

Questions about water heater installation in Mesa? Start here, or tell us what is happening at your home.

Ask our team
Is removing the old water heater part of the installation?

Yes. Taking out the old heater is part of the job, along with fitting the new one and testing how it runs.

Do I need to choose a heater before calling?

No. Share how you use hot water and what is installed now. Trident compares the systems suited to the property and explains the work each one would require.

Will the new heater be tested before the visit ends?

Yes. Testing operation is part of the process, followed by an explanation of how to run and maintain the new heater.

What if I am not sure the old heater needs replacing?

Start with an assessment. A repairable fault and a heater that needs replacing can look alike, so the findings should come first. Mention roughly how old the heater is and any repeated repairs.

Does Mesa offer a rebate on a new water heater?

The City offers a bill-credit rebate on a new tank-style natural gas water heater of at least 30 gallons for its own gas customers with individual meters. Southwest Gas customers are not eligible, and the application must be made within six months of purchase.

Do I need a permit to switch to a tankless water heater?

If you are replacing a gas storage heater with a tankless or on-demand gas unit, yes. The City exempts only like-for-like residential replacements of equal or lesser rating. Notify your gas utility before the new heater goes into service.

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Plan your new water heater

Tell our North Phoenix office about the current heater at your Mesa property, what prompted the change and any system you have in mind.

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