Switching a water heater from gas to electric means capping the old gas line, closing off the vent, and giving the new tank its own 240-volt circuit, which sometimes needs electrical panel work first. Switching from electric to gas means running a gas line to the heater, adding a vent and a shutoff, and having the work permitted. Both are planned jobs that are priced after a visit, not same-day swaps.
Why People Switch Fuels
Most water heater replacements in Wilmington are like-for-like: gas for gas, electric for electric, in the same spot. A fuel switch usually comes up for one of these reasons:
- The gas service is going. The house is moving off gas, or the water heater is the last gas appliance and the owner would rather drop the gas bill altogether.
- A finished basement or a renovation. The old flue is in the way of a remodel, and an electric tank needs no vent.
- Gas is now available. A home that was all-electric has had gas brought in for a furnace or range, and the owner wants a gas water heater too.
- Recovery time. A family that keeps running out of hot water may want gas, because a gas tank reheats faster than an electric one of the same size.
Each direction has its own work list. Knowing it before you call makes the visit faster and the quote easier to compare.
Gas to Electric: What the Job Involves
Going electric removes the gas and venting side of the job and replaces it with wiring. In practice that means:
- Capping the gas line. The gas supply to the old heater is shut off and capped safely at the right point, then leak-tested.
- Closing off the vent. The old metal flue is removed and the opening is sealed. If another gas appliance, such as a furnace, still uses the same chimney, the vent for that appliance has to be checked, because it no longer shares the flue with the water heater.
- A dedicated 240-volt circuit. An electric tank does not plug into a wall outlet. It needs its own 240-volt circuit sized to the heater, run from the electrical panel. If the panel has no room, or the home's service is small, panel work comes first.
- The tank itself. Once the circuit is ready, the new tank is set, piped, fitted with an expansion tank and a relief valve discharge line, and connected.
The panel is the part most people do not expect. ENERGY STAR's heat pump water heater buying guide says it directly: "Electric panel upgrades may be needed if replacing a gas water heater or if a 240V outlet is not available." That applies to a standard electric tank as well, because it also runs on 240 volts.
We look at your panel on the visit and tell you plainly whether the switch needs electrical work before the heater goes in, so you are not surprised halfway through. Our post on electric water heater replacement covers the wiring side of an electric tank in more detail.
Electric to Gas: What the Job Involves
Going to gas is usually the bigger job of the two, because it adds three things the house may not have near the heater:
- A gas line. Gas has to reach the water heater from the meter or an existing line, sized for the heater's input along with every other gas appliance on that line. Long runs in older rowhomes and basements with finished ceilings take more time.
- A shutoff and drip leg. The heater gets its own gas shutoff valve and sediment trap at the connection.
- A safe vent. A standard atmospheric gas tank vents through a metal flue, usually into a chimney. If there is no usable chimney, a power-vent model that vents out through a wall may be the answer, which changes the heater and the price.
The old electric circuit is disconnected at the heater and made safe. Because gas piping and venting are involved, the work is permitted and inspected. If you are weighing a gas tank against a tankless unit at the same time, our guide on tankless water heater sizing explains how the gas line and vent change with the size of unit.
What It Does to the Price and the Schedule
Our published installed prices are for like-for-like replacements: $2,198 for a 50-gallon Bradford White electric tank and $2,498 for a 40-gallon Bradford White gas tank, each with the expansion tank included and valves priced on site. A fuel switch adds work that a straight swap does not have, such as a new circuit, a gas line, or vent changes. That extra work depends on your house, so we price it on the visit and you approve the full flat price before any work starts.
A fuel switch is also rarely a same-day job. It may need an electrician for panel work, a gas line run, or a vent route that has to be planned. If your current heater has just failed and you need hot water tonight, the faster route is usually a like-for-like replacement now and a planned switch later. Our post on same-day water heater replacement explains what fits in one day.
Running Costs and Other Trade-Offs
Fuel also changes how the heater behaves day to day:
- Recovery. A gas tank reheats faster than an electric tank of the same size. A household that runs several showers back to back may notice the difference after switching to electric, and may want a larger electric tank to make up for it.
- Power cuts. A standard atmospheric gas tank keeps heating during a power cut. An electric tank does not.
- Venting and air. An electric tank has no flue and no combustion, so it can go in places a gas tank cannot, such as a closet with no chimney access.
- Operating cost. Whether gas or electric is cheaper to run depends on current utility rates for your home, which change over time. Check your own gas and electric bills rather than relying on a rule of thumb.
Need water heater service in Wilmington?
Serving Wilmington with same-day availability and flat-rate pricing confirmed before work begins.
A Heat Pump Water Heater Is a Third Option
If you are leaving gas, a standard electric tank is not the only choice. A heat pump water heater uses electricity to move heat from the surrounding air into the water, rather than heating it directly with elements. It needs the same 240-volt circuit in most cases, plus enough space and air around it, and it costs more up front. Our post on heat pump water heaters in Delaware covers when that trade-off makes sense in a local basement.
Questions to Ask Before You Switch
Before you book, it helps to know the answers to these:
- Is the water heater the last gas appliance in the house, or will the furnace or range stay on gas?
- How old is the electrical panel, and does it have open space for a double breaker?
- Where does the current heater vent, and does anything else share that chimney?
- How many people use hot water at the same time on a busy morning?
- Is there a renovation planned that affects where the heater should sit?
Frequently Asked Questions
Can you switch from gas to electric on the same day?
Sometimes, when the panel already has a suitable 240-volt circuit near the heater. More often the circuit or panel needs work first, so the switch is booked as a planned job.
Do I need a permit to change water heater fuel?
Water heater replacements in most Delaware jurisdictions are permitted work, and a change that involves gas piping, venting or new wiring is too. We confirm what applies to your address.
Is the published price the price for a fuel switch?
No. The published prices cover like-for-like replacements. A fuel switch adds work that we price on the visit, and you approve the full flat price before we start.
Do you serve outside Wilmington?
Yes. We cover New Castle County, Chester County, PA and Cecil County, MD.
Planning a Fuel Switch in Wilmington
A water heater fuel switch is a good project to plan before the old tank fails. Call Water Heater Now at (302) 240-2818. We check the panel, gas line and venting, explain what your switch involves, and confirm a flat price before any work starts. See our water heater installation and replacement service for what is included.
---
Source, verified November 4, 2026: ENERGY STAR, Heat Pump Water Heater Buying Guide.
