Most replacements we provide follow a tank failure: a leak through the tank body or seam, or a heater whose condition makes another repair a short-term fix. The decision itself is covered on our repair-versus-replacement page. This page covers what happens after that decision, so you know what to expect and what to check.
Sizing: same size is the starting point, not a shortcut
The starting point for most replacements is a unit of the same type and size as the one being replaced. That is not just habit. A larger unit draws more gas or electricity, may not fit the closet or platform, and in a park model triggers the permit and detached-structure rule described below. A smaller unit may not meet the household's hot water needs. Sizing questions — household size, bathroom count, and simultaneous use — matter, but they are weighed against fit, supply, and the home-type rules, not used to justify the largest unit available.
Gas and electric are not interchangeable choices. A gas heater needs its gas supply and venting arrangement checked, and an electric heater needs its electrical supply and disconnect arrangement checked. Switching fuel type is a larger job than a like-for-like swap, and it should be discussed as a separate scope, not assumed.
Site-built, manufactured, and park-model replacements
Site-built homes. The heater is usually in a garage, utility room, or closet. Access, platform or pan condition, and the discharge pipe arrangement are the main site checks, along with the connections described below.
Manufactured homes. The replacement unit must be made for manufactured-home use and must fit the closet. Removal and installation access is tighter, and under-home shut-offs and piping can affect the job. A standard residential unit that does not fit the closet or meet the manufactured-home suitability is not a suitable substitute.
Park models. The City park-model policy is specific: replacement must be of equivalent type and size, with the same or less electrical or gas demand as the original. A larger unit requires a permit and must be installed inside a permitted and approved detached accessory structure. A heater must not be installed on the exterior of a park model. If a provider proposes a larger park-model unit without that step, ask how the permit and structure requirements are being met.
What the job includes, and what to confirm in writing
- Removal of the old unit and its disposal arrangement.
- The new unit's type, size, and fuel type, confirmed against the space and the home type.
- Inlet and outlet connections, and any fitting or valve work included in the scope.
- The TPR valve and discharge pipe arrangement — never capped or blocked.
- Drain valve and, where relevant, expansion tank and sediment considerations.
- Platform, pan, or stand condition, where the heater sits on one.
- Whether a permit check applies, and who confirms it for your address.
Confirming that list in writing before work starts protects both sides. It is also the list to use when comparing quotes: two quotes that differ in scope are not comparable on a single figure, which is why our cost factors page gives factors, not figures.
Permits: check, do not assume
Whether a replacement needs a permit depends on the job and the jurisdiction. Inside Apache Junction city limits, the City's building safety office is the authority; in unincorporated areas, the county building safety department is the authority. Like-for-like work and upsizing are treated differently, and park-model work has its own rule. We do not give definitive permit advice for your address on this site — the check for your home is part of the service discussion, and the City or county office is the authority that confirms it.
After replacement: first checks worth doing
After a replacement, check the connections and valves for drips over the first days of use, note whether hot water supply and temperature behave as expected, and keep the area around the heater clear so a future leak is visible early. A heater hidden behind stored items is a heater whose first leak goes unnoticed. The warning-signs page lists the early signs to watch for, so a small problem is caught while it is still a part problem.
Frequently asked questions
How long does a replacement take?
That depends on access, home type, and whether connections or the platform need work. A straightforward like-for-like swap in an accessible garage is a different job from a tight manufactured-home closet replacement. We discuss the scope for your home before work starts, rather than promising a duration in advance.
Can I switch from gas to electric, or electric to gas?
Fuel switching is a larger job than a like-for-like replacement, because the gas supply and venting or the electrical supply and disconnect must be checked and, where needed, changed. Discuss it as a separate scope, with its own checks, rather than as a simple unit swap.
What happens to my old heater?
Removal and disposal of the old unit should be confirmed as part of the written scope before work starts. Ask any provider, including us, to confirm that point explicitly rather than assuming it.
Does a replacement need a permit?
It depends on the job and the jurisdiction for your address. Inside city limits the City is the authority; in unincorporated areas it is the county. Park-model upsizing has its own permit and structure rule. Confirm the position for your home before work starts.
Related guides
Water Heater Repair vs Replacement: How to Decide
Water Heater Replacement Cost Factors
Gas Water Heater Leak Repair in Apache Junction, AZ
Electric Water Heater Leak Repair in Apache Junction, AZ
Contact us to schedule your service
Tell us where the water first appears, how fast it is spreading, and whether it is hot. We provide water heater leak repair and replacement in Apache Junction, AZ.