Planning a water heater installation: size, location and fuel
Water heater installation means choosing a unit that fits your household, then connecting its water, fuel or power, venting and safety valves to the manufacturer's instructions. The Florida Building Code, Plumbing, section 502.1 requires exactly that. The plan matters more than the day itself.
Sizing by how you use hot water
Look at the first-hour rating on the label, not only the gallons. It estimates how much hot water the unit can deliver in a busy hour. A household that runs showers back to back needs a different unit than one that spreads use out.
A bigger tank is not always better. It holds more stored heat and takes more floor space.
Moving the heater or switching fuel
Keeping the heater where it is keeps the job simple. Moving it means new piping, and often a new vent, drain or circuit. A switch from gas to a hybrid heat pump unit adds an electrical circuit and an air and drain requirement, and the old gas line must be capped properly.
In new construction and remodels, the location and the gas or power stub are set before the walls close. That belongs with plumbing installation planning. If your old tank has already failed, see water heater replacement instead.
Install day, in order
Confirm the plan
The plumber checks the unit against the label, the space and the fuel supply before touching anything.
Isolate and remove
Water, power and gas are shut off, the old tank is drained safely, and it is disconnected and carried out.
Set and connect
The new unit is leveled, piped and vented. The relief valve gets a proper discharge pipe, and a pan, expansion control or new shutoff valves go in where the setup calls for them.
Fill, test and hand over
The tank is filled before power or flame. Gas joints are leak-tested, and the vent is checked for draft. You get a walk-through of the controls.
Planning a new heater?
Call with your current heater's label photo and we will talk through size, fuel and location.
What we need from you before the visit
A few details let the plumber arrive with the right unit and parts.
- A photo of the data label on the current heater, showing model, serial number and capacity.
- The fuel type, and whether you hope to switch it.
- How many people use hot water, and whether a tub or two showers run at once.
- Where the water shutoff, the breaker and the gas valve are.
- A clear path to the heater, plus attic access if it sits above the ceiling.
- Any rebate you plan to claim. Duke Energy's heat pump rebate requires a Home Energy Check first.
We do not quote an installation over the phone without knowing the fuel, size and location. Dispatch confirms what the job needs.
Fuel type and what changes on installation
| Fuel | What changes | What to watch |
|---|---|---|
| Natural gas, where available | Vent, combustion air, gas connection and leak test. Gas heaters follow the Florida Fuel Gas code. | A plastic pan is not allowed under a gas heater. Pipe size must meet the unit's demand. |
| Electric | A circuit and breaker matched to the heater's rating. Electrical work follows the National Electrical Code. | Power stays off until the tank is full. |
| Hybrid heat pump | A suitable circuit, open air around the unit and a condensate drain. | Duke Energy rebates apply to heat pump units for its customers only. |
| Gas tankless | Higher gas demand and a new vent path. Our tankless water heater page explains more. | The gas line may need upsizing. |
Permit and inspection: the Ocoee Building Division
Florida Building Code, Building, section 105.1 requires a permit to install or replace a plumbing, gas or mechanical system. Ocoee takes applications at permits.ocoee.org, and one general application covers all permit types. The Building Division is at 407.905.3104, and its inspector phone window runs weekdays from 7:00 to 8:00 a.m.
Contractors must show active registration, proof of a state license and insurance. Ocoee's forms list no water-heater-specific rule, so ask the Building Division and ask your installer who applies and who schedules the inspection.
What decides the price of an installation
We give no number here, because the same heater costs very different amounts in different houses.
Insurance usually does not pay to install a new heater by choice. It may help if a sudden failure caused water damage. Ask your insurer first.
Garage, attic or closet in Ocoee homes, and hurricane season
Garage
Garages are easiest to access, but floods reach them first. Ask about raising the unit on a stand. A hybrid unit in a garage draws on that air, which suits it.
Attic
A leak lands on a ceiling, so the pan and its drain matter most. Outdoors, the drain should end 6 to 24 inches above grade. Make sure the access path can take a full tank.
Closet
Check height, combustion air and door type. A closet can suit a gas heater, but starve a hybrid unit of air.
Hurricane readiness
The National Weather Service logged gusts of 55 to 75 mph and 4 to 8 inches of rain in Orange County during Hurricane Milton in 2024, with flooding in low areas. After a flood, a heater whose controls were under water needs a technician's check. When power returns, do not switch an electric heater on until the tank is full.
Before you book a water heater installation
It depends on the job. A same-fuel swap in the same spot is the shortest. A move, a fuel change or a new circuit adds work. We do not promise a time window before the plumber has seen the fuel, size and location.
Often, yes. The home needs a suitable circuit, open air around the unit and a condensate drain, and the old gas line is capped. Duke Energy's rebate covers heat pump heaters only, for its customers, and needs a Home Energy Check first.
The IRS says the 25C credit is not allowed for property placed in service after December 31, 2025. Check with a tax adviser, and ask Peoples Gas if you are its customer about the rebates it lists.
Ask your installer this before signing. Ocoee permits are applied for at permits.ocoee.org, and the Building Division at 407.905.3104 answers questions about inspections.
Florida law places gas piping within the plumbing contractor's scope. Pipe size must meet the heater's demand under the Fuel Gas code, and rusty old piping deserves inspection. If digging is needed, Florida law requires a Sunshine 811 call at least two full business days before.
Ocoee Express Plumbing dispatches from Ocoee to nearby areas. Our Windermere plumber page explains that coverage. Confirm your address with dispatch.