The plumber leads, and here is why
A water heater touches three systems at once. Cold water comes in through a shutoff valve, hot water leaves through piping that must not leak, and a temperature and pressure relief valve needs a discharge line that ends somewhere safe. All of that is plumbing work, and a licensed plumber is trained to do it to the plumbing code.
A gas heater adds a gas connection, a vent that carries exhaust out of the house, and combustion air. An electric heater adds a dedicated circuit and a properly sized breaker. When those parts are wrong, the result is not a drip. It is carbon monoxide, a scalded family member or a failed inspection.
Who does which part of the job
The trade on site depends on the type of heater and on what is already in place. Use this table to see where an electrician or gas fitter may join the plumber.
| Heater type | Plumber handles | Other trade that may be needed | Ask the installer |
|---|---|---|---|
| Gas tank | Water lines, relief valve, drain pan, vent connection | Gas piping changes if the old line is too small or in the wrong spot | Who sizes the gas line and tests it for leaks? |
| Electric tank | Water lines, relief valve, drain pan | Electrician if the circuit or breaker does not match the new unit | Is the existing circuit rated for this heater? |
| Tankless gas | Water lines, isolation valves, condensate or vent connection | Gas piping upgrade is common because the burner draws more gas | Does the gas line need to be larger? |
| Heat pump (hybrid) | Water lines, condensate drain, relief valve | Electrician for a 240 volt circuit if none is nearby | Where does the condensate drain, and is there room around the unit? |
Can a handyman or a general contractor do it?
A handyman can help with small fixture work, but a water heater swap involves plumbing, venting and often gas piping, so the licensed plumbing contractor should be the one doing it. A general contractor often hires a licensed plumber for exactly this reason, so ask who will actually do the pipe work and whose licence is on the permit if one is needed.
Do-it-yourself replacement is a different question. Homeowners do swap tanks, but a mistake with a vent or a relief valve line has consequences beyond the repair bill, and an unpermitted or unlicensed install can complicate a later home sale or an insurance claim. If you are unsure, hire out the gas and venting parts at the very least.
Gas, electric and heat pump: what changes on install day
Details that decide the job length and the quote
- Vent condition and routing for gas tanks, including whether the old flue pipe is rusted or sloped the wrong way.
- Whether the heater sits in a closet, a garage or an attic, because access and a drain pan with a drain line change the labor.
- Whether the old unit's water and gas shutoffs still work, since a stuck valve means a new valve before anything else.
- Whether an expansion tank is needed on a closed plumbing system, and whether the existing one is waterlogged.
- For heat pump units, free air space around the cabinet, a condensate drain path and a 240 volt circuit.
Sizing is part of the conversation too. The right capacity depends on how many people use hot water at the same time, not on the house square footage. Our water heater installation page covers tank, tankless and heat pump options in more detail.
Morrisville permits and how to check a licence
Permit and licence checks for a Morrisville water heater
The Town of Morrisville Inspections Department says a plumbing permit is required for installing, relocating or replacing a plumbing system. Its residential page describes an exception for water heater replacement in a one or two family home. The conditions are that the new unit uses no more energy than the old one, nothing changes in fuel, location, venting or piping, and a licensed plumbing contractor does the work.
The same page tells homeowners to contact the office to confirm whether a permit is needed. Do that before the install date, not after. The department's phone number is 919-463-6190. Separately, the NC State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors runs a public licence search, so you can look up any contractor yourself before work starts.
Source: Town of Morrisville Residential Inspections page and the NC licensing board public search.
If your heater is in a Durham address instead, the permit office is different. Our Durham service page explains how we cover that side of the line.
What a proper install visit looks like
The exact order varies by heater, but a careful visit follows this outline.
- 01
Shut off and drain
The installer closes the cold supply and the gas or power, then drains the old tank to a floor drain or outdoors with a hose.
- 02
Disconnect and remove
Water connections, the vent and the relief valve line come off, and the old heater is moved out without scraping flooring.
- 03
Set and connect the new unit
A drain pan goes in where required, the unit is leveled, and new flexible connectors, a relief valve and a discharge line are installed.
- 04
Test before leaving
The installer fills the tank, checks every joint for drips, tests gas fittings with leak detector solution, fires the burner and confirms the vent draws properly.
How to vet an installer before you sign
Questions to ask and what to look for
- Ask for the contractor's licence and look it up on the state board's public search yourself.
- Ask whether the quote is a clear price before work starts and what would change it, such as a vent replacement.
- Ask who pulls the permit if one is required, and who schedules the inspection.
- Ask what is done with the old heater and the old expansion tank.
- Ask for the model's capacity and efficiency rating in writing, not just the brand.
If an installer can not name a licence or avoids the permit question, keep looking. A real contractor expects these questions.
Code edition and licence check
Water heater work in North Carolina follows the 2024 North Carolina Plumbing Code, mandatory since July 1, 2025 and based on the 2021 International Plumbing Code (IPC). Check the installer's licence at nclicensing.org before you agree to anything.
Ask the Town of Morrisville Inspections Department at 919-463-6190 whether your swap needs a permit.
Call (919) 944-7281 and we will talk through gas, electric or heat pump options and book a same-day appointment when available.
If the heater has already failed
A leaking tank is the situation where waiting costs money. Close the cold water inlet on top of the heater, switch off the gas control or the breaker, and put towels or a wet vacuum on the floor while you wait. Our dispatch line works 24/7 if water is spreading.
If the heater is simply old and not leaking, you have time to compare options. See water heater replacement for the repair or replace decision.
Questions about this topic
A licensed plumber installs it. An electrician is added only when the heater needs a new or upgraded circuit, which is common for heat pump models and sometimes for electric tanks.
Homeowners do sometimes, but gas piping, venting and relief valve discharge lines are where mistakes become safety problems. If you do your own work, ask the Town of Morrisville Inspections Department whether your project needs a permit and an inspection.
The Town of Morrisville Inspections Department handles permits for Morrisville addresses and can be reached at 919-463-6190. Ask them whether your like-for-like swap needs a permit, because the answer depends on whether fuel, location and venting stay the same.
Water for Morrisville homes comes through the Town of Cary, but for permit questions the Morrisville office is the one to call.
A straightforward like-for-like tank swap is usually a half day job. Moving the heater, replacing a vent, adding a gas line or running a new circuit makes the visit longer, and the installer should tell you that before work starts.
Use the public licence search from the North Carolina board that licenses plumbing contractors, at nclicensing.org. Search by name or company, and confirm the licence is active before you agree to the work.
Yes, as part of our water heater installation work, including the condensate drain and relief valve connections. Ask Duke Energy directly about any current rebate, because eligibility for North Carolina customers is not something we can promise on this page.