Repair or replace? A table for deciding
Diagnosis comes before any sale. A heater with a bad element or a worn thermostat may have years left, while one weeping from the tank wall has none. Use the table to see where yours falls and call if it is still unclear.
| What you found | Lean toward | Why |
|---|---|---|
| Leak from a fitting, valve or connector | Repair | The tank is intact and the part is cheap to swap |
| Water from the tank body or bottom seam | Replace | Corrosion through the steel cannot be patched |
| Lukewarm water on an electric unit with a dry tank | Repair first | A lower element or thermostat is the usual cause |
| Rusty hot water, a rumbling tank and repeated part failures | Replace | The inside of the tank is breaking down, so more parts only delay the end |
| An older tank that has now failed in a second place | Replace | Two failures in a short span usually mean the whole tank is wearing out |
Age is a clue and not a verdict. The serial number on the data plate encodes the build date, and each manufacturer formats it differently, so ask us to read it with you. Leak history and the cost of the repair matter as much as the date. The repair page covers the cases where a part is all that has failed.
Flooding from a failing tank: protect the house first
If the tank is flooding the room
A tank that lets go can release many gallons in minutes. These moves buy time and protect your claim.
Shut the cold supply
Turn the valve above the tank clockwise. If it will not move, close the main shutoff where the line enters the house.
Remove the energy source
Breaker off for electric, gas control to off for gas. Never touch a panel while standing in water.
Lift and photograph
Move stored items off the floor, then photograph the tank, the data plate and the water line before you clean up.
Call dispatch
Ring (919) 944-7281 and read out the details from the data plate if you can see them safely.
Choosing the new heater: capacity, fuel and venting
Match the replacement to how your household uses hot water and not only to the size of the old tank. The manufacturer's specification sheet lists a first-hour rating, which describes how much hot water the unit delivers in the first hour of heavy use. A busy morning with several showers is the test that counts.
Fuel and venting decide how much work the swap involves. A like-for-like gas replacement reuses the gas line and the flue. Changing fuel, moving the tank or altering the vent route turns a swap into an installation job with more steps.
What we confirm before ordering a unit
- Fuel type and the size of the supply line
- Tank capacity and first-hour rating against your busiest morning
- Physical fit, including closet height, door width and clearances
- Flue size and condition for gas units, and combustion air in a closet
- House water pressure and whether a thermal expansion tank is needed
- A drain pan, and where the relief valve discharge pipe ends
Switching fuel or moving to a heat pump
Swapping gas for electric, or a standard electric tank for a heat pump water heater, is a change of fuel or equipment type and not a plain like-for-like replacement. A heat pump unit also needs open space and airflow around it, a condensate drain and an electrical circuit with enough capacity. Those details live on the installation page.
Incentives have shifted. The federal 25C home improvement credit covered installs through December 31, 2025, and the IRS says it is not available for installs in 2026. Duke Energy publishes a heat pump water heater rebate page, but we could not confirm that it applies to North Carolina customers or that it is open today. Ask Duke Energy before you count on a rebate. We do not quote rebate amounts.
Permits for a water heater swap in Morrisville
The Town of Morrisville Inspections Department says a permit is generally not needed to replace a water heater in a one or two family home. The conditions are that the new unit uses no more energy than the old one, the fuel and location stay the same, and the venting and piping keep the same routing and sizing. A licensed plumbing contractor must do the work. Anything outside those conditions is a separate question.
The department asks owners to contact it when they are unsure. Call 919-463-6190 and confirm with the Inspections Department before work starts, particularly if you plan to switch fuel or move the tank. Part of Morrisville extends into Durham County, so ask which office covers your address.
What a replacement visit covers
A like-for-like swap is usually a single visit once the right unit is on the truck.
- 01
Shut down and drain
Water, power and gas are isolated, then the old tank is drained to a floor drain or outdoors through a hose.
- 02
Remove the old tank
The tank is disconnected, carried out and hauled away so you are not left with a rusted shell in the garage.
- 03
Set and connect the new unit
New flex connectors, a shutoff valve, a relief valve with a proper discharge pipe and a pan where the space calls for one.
- 04
Fire, test and walk you through
We heat the tank, check every joint and the flue, set the temperature and show you the shutoff and the relief valve.
Parts that are decades old rarely deserve a second life next to a new tank. We replace the connectors and valves that touch the unit and tell you what else we noticed, such as a corroded gas flex or a missing expansion tank.
What changes the price of a water heater replacement
The tank is only part of the total. You get a clear price before work starts, and these are the pieces that move it.
Type and capacity of the unit
A standard tank, a larger family-size tank and a heat pump unit sit in very different price ranges.
Fuel changes
A gas to electric or heat pump switch can add electrical work, a new circuit or a condensate drain.
Venting and gas work
A damaged flue, a new vent route or an undersized gas line adds parts and labor.
Code and permit items
Expansion tanks, pans, relief valve piping and any permit the town requires are part of a compliant install.
Location and access
Attics, tight closets and stairs slow the work and the removal of the old tank.
A sudden tank failure that floods the house is often a covered event under homeowner policies, but the cost of the heater itself and damage from a slow leak often are not. Read your policy or call your agent before you discard the old tank.
Gas safety, exhaust and carbon monoxide on a swap
A gas heater sends exhaust up a flue, and a flue that is blocked, cracked or poorly pitched can spill that exhaust into the room. We look for soot, rust at the draft hood and a backdraft with a smoke test after the new unit fires. A working carbon monoxide alarm near the sleeping area is a good idea in any home with a gas appliance.
If you ever smell gas, leave the house and call Enbridge Gas at 1-877-776-2427 or 911, then call us. Work on the gas line itself falls under gas line repair, which we treat as a separate, safety-first job.
Night and weekend replacements
Tanks fail at night as often as they fail at noon. Dispatch answers 24/7, and a plumber can often make the house safe the same night. Sometimes the right size or fuel type is not available at two in the morning. In that case we shut the heater down, stop the water damage and set the installation for the next same-day appointment when available.
Call any hour and tell dispatch the fuel type from the data plate.
If you are weighing tankless
A replacement is also the moment to ask whether a tankless unit suits the house. It saves floor space and never runs out in the middle of a long shower, but it may need a larger gas line or a bigger electric circuit. Read the trade-offs before you commit.
Questions we hear
The town says a permit is generally not required for a like-for-like swap in a one or two family home done by a licensed plumbing contractor, with no change in fuel, location, or the routing and sizing of the venting and piping. Rules for other cases differ. Confirm with the Inspections Department at 919-463-6190 before work begins.
Yes. Dispatch answers 24/7. A plumber can often make the house safe the same night, and the installation follows in a same-day appointment when available.
Look at the first-hour rating and the number of people who use hot water at the same time, not just the gallon count on the old label. We compare your morning routine with the specifications. A bigger tank is not always the answer.
Yes in many homes, but it is a change of fuel and not a like-for-like swap. It needs a circuit with enough capacity, and the town asks you to confirm permit needs with its Inspections Department.
Yes. We remove the old unit and its connectors as part of the job so the garage or closet is clear when we leave.
The federal credit ended for 2026 installs per the IRS. Duke Energy has a published rebate page, but we could not confirm North Carolina eligibility or that it is open, so ask Duke Energy directly.
Use the public license search on the North Carolina State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors site at nclicensing.org. Ask for the contractor's name as the license lists it. Our work is done by licensed and insured plumbers.