05Est. $1,400 - $3,800
Water Heater Replacement
Like-for-like swaps and size changes, with the old heater drained and hauled away.
$1,400 - $2,900Estimated cost of a like-for-like gas tankOur estimated range
48%of U.S. homes use gas as the main water heating fuel; 46% use electricityU.S. EIA, 2020
10 - 15 yrsDOE's figure for how long a storage tank lastsU.S. DOE
1.8 millioncustomers on Atmos Energy's Mid-Tex system, in 550 communitiesCity of Austin filing, 2025
29.2 daysa year at or below 32 degrees at DFW AirportNWS Fort Worth, 1991-2020 normals
Short answer
Gas water heater installation in Rowlett swaps a 40 to 80 gallon tank on Atmos Energy gas and brings the vent, shut-off, sediment trap and relief line up to current practice. A like-for-like gas tank is estimated at $1,400 to $2,900. Nationally 48% of homes heat water with gas and 46% with electricity, so neither fuel is unusual.
01The case for gas
Why Gas Is Still the Default in Many Rowlett Garages
Rowlett's gas comes from Atmos Energy, whose Mid-Tex division serves about 1.8 million customers in 550 communities across the Dallas area, according to a June 2025 City of Austin presentation. That reach is why a gas line already runs to the water heater in so many Rowlett houses, and why swapping a gas tank for another gas tank is the shortest, cheapest job there is.
The U.S. Energy Information Administration's 2020 survey puts natural gas at about 48% of American homes' main water heating fuel and electricity at about 46%. Rowlett isn't an outlier, and neither fuel is a mistake. What decides it in a given house is the plumbing already in place, and the table shows how the options compare on the numbers that change the decision.
| Gas tank | Electric tank | Gas tankless | |
|---|---|---|---|
| Estimated installed range | $1,400 - $2,900 | $1,400 - $2,800 | $3,800 - $7,500 |
| Life, per U.S. DOE | 10 - 15 years (storage) | 10 - 15 years (storage) | More than 20 years |
| Needs a vent | Yes | No | Yes, its own |
| Needs a gas line | Yes, usually the existing one | No | Yes, usually a larger one |
| Works in a power cut | Depends on the ignition type | No | No |
The ranges are our own estimates, not quotes. The DOE lifetimes come from its Energy Saver pages and are broader than the 8 to 12 years many installers plan on in hard water, which is covered below.
02Before the burner is lit
Six Checks That Come Before a New Gas Heater Is Fired
A gas tank is easy to carry in and easy to connect badly. These are the checks that come before it is lit, in the order they happen on site:
- Label and size. Age, capacity and input are read off the old tank so the new one is not just a copy of a heater that was wrong for the household.
- The vent. The flue should rise steadily toward the roof or wall termination, with tight joints and clearance to anything that burns. The model fuel gas code asks horizontal vent connectors to rise at least a quarter inch per foot.
- The gas joint and shut-off. A quarter-turn valve and a sediment trap (a short drip leg) sit on the line ahead of the heater, and every fitting is leak-tested before the burner lights.
- Burner height in a garage. About 18 inches off the floor on a stand, unless the tank is listed as flammable-vapor-ignition-resistant and the maker and local code allow the floor (see the next section).
- The relief valve. The temperature and pressure relief valve gets a discharge pipe that runs down to a safe spot and ends short of the floor, not capped and not teed into anything.
- Expansion control. If a check valve, backflow device or pressure-reducing valve closes the system, an expansion tank goes in, because heated water has to go somewhere.
Those six are model-code items from the International Code Council's residential and plumbing codes. Texas cities adopt those codes by ordinance and may amend them, so Rowlett's adopted edition is what governs a given job. We confirm it before the quote.
03Where the heater sits
Garage, Closet or Attic: What Changes for a Gas Unit
A garage is the usual home for a Rowlett gas tank. Fumes from fuel, paint thinner and solvents are heavier than air and gather near the floor, so the model residential code raises the ignition source of any gas appliance in a garage to at least 18 inches above the slab. That is why a gas tank in a garage has traditionally sat on a stand. Since about 2003 most new residential gas tanks have been built to resist igniting vapors outside the tank (the industry calls it FVIR), and the model fuel gas code lets a floor-mounted FVIR tank skip the 18 inches unless the maker or the local code says otherwise. An older tank without that listing, found on the floor of a garage, is a code item on the quote.
A closet is different: the heater needs air to burn. Louvers or ducts bring combustion air in, usually one opening high and one low, and a closet door that has been taped over or stacked against can starve the burner and let it soot up. A carbon monoxide alarm nearby is cheap protection.
An attic is the riskiest. The model plumbing code asks for a drain pan, at least 1.5 inches deep with a 3/4 inch drain, under a storage heater wherever a leak could cause damage, and a gas unit also needs a vent that stays sound and a safe way in. The pan is not required when replacing a heater that had none, but it is the cheapest protection against a ceiling repair, and we price it as an option. The attic installation page and the garage page cover each in detail.
04Rowlett's water
What Hard Water Does Under a Gas Burner
7.1 - 9.3 gpgGrains per gallon implied by NTMWD's sampled treated-water hardness, October 2022 to May 2023 (122 to 160 mg/L divided by 17.12).
The North Texas Municipal Water District describes its treated water as moderately hard, mainly from minerals in Lavon Lake. Its own conversion rule is to divide total hardness in milligrams per litre by 17.12 to get grains per gallon. NTMWD's monthly analysis tables for treated water at its Wylie plant show total hardness of 122 mg/L in October 2022, 160 in February 2023 and 150 in May 2023. Divided by 17.12 that is about 7.1, 9.3 and 8.8 grains per gallon. Those are sampled months at one plant, not a yearly average, but they put the water firmly in the range that leaves scale.
On a gas tank the scale falls to the bottom, directly above the burner. Sediment there insulates the water from the flame, so the burner runs longer for the same hot water, and it holds heat against the steel of the tank bottom. That is the reason a tank that has never been flushed rumbles. A flush once a year and a check of the anode rod every few years are the two cheapest ways to keep a gas tank toward the long end of its life. The flushing guide has the steps.
Need Gas Water Heater Installation in Rowlett?
Tell us the age, size and location of the old tank and you get an estimated range on the call.
05What it costs
Where the $1,400 to $2,900 Goes, and What Pushes It Past
A like-for-like gas tank, 40 to 50 gallons, in a garage where everything can be reached, is estimated at $1,400 to $2,900. A tank that needs code updates or sits in an attic is estimated at $2,200 to $3,800. Going to tankless is estimated at $3,800 to $7,500. These are our estimated ranges, and the written quote is the price.
Inside the first range the unit and the labor are the bulk of it. The lines that move a quote are the ones the old install left out: a new shut-off and flex connectors, a sediment trap, the relief discharge pipe, an expansion tank where the system is closed, a stand in the garage, and the permit where Rowlett requires one. The old heater leaves with us, and that is on the quote too. If a quote you hold lists none of these, it is not the same job, and the cost guide explains how to compare.
06Weather and power
Freezes, 100-Degree Days and the Power Cut
DFW Airport's 1991 to 2020 normals count 29.2 days a year at or below 32 degrees and 20.2 days at or above 100. A garage heater on an outside wall feels the freeze days, which is why exposed pipes get insulated, and an attic heater feels the hot ones.
The harder test was February 2021. Texas's health department counted 246 deaths from Winter Storm Uri, 22 of them in Dallas County, and the grid failed for days. A gas tank with a standing pilot or a thermocouple keeps heating without power, while a model with an electronic igniter does not. If outage resilience matters to you, ask which ignition your tank uses before you buy it, and keep a carbon monoxide alarm working. Gas tankless units, for comparison, need electricity for their fan and controls.
07The hot-water setting
Setting the Thermostat: The 120-Degree Number
120 vs 140Five minutes to a third-degree burn at 120 degrees, about six seconds at 140, per the U.S. CPSC.
The U.S. Consumer Product Safety Commission recommends 120 degrees Fahrenheit. Its published burn times for an adult are about five minutes of exposure at 120, thirty seconds at 130, six seconds at 140 and two seconds at 150 degrees. A dial is not a thermometer, so the check we make after every install is a thermometer reading at the nearest tap. Lowering the setting also slows sediment and saves gas, and a household that needs hotter water for a dishwasher can use one with a booster heater instead.
08The day itself
How a Gas Install Runs, Hour by Hour
A like-for-like gas swap usually takes 3 to 5 hours. The first half hour is the fit check and the quote in writing. Then the gas is shut off at the valve, the old tank is drained and disconnected, and the new unit is set on its stand, piped, vented and connected. The gas joint is tested with leak solution, the tank is filled and purged of air, and the burner is lit and checked for a steady blue flame and a clean draw at the vent. The last step is running hot water at a faucet and measuring the temperature.
Conversions to tankless, moves from an attic and new gas lines can take most of a day. They are scheduled after the fit check, and the replacement page and same-day page show which jobs are which.
09Rules and who does the work
Permits, Licenses and Doing It Yourself
In Texas, plumbing for customers needs a license from the Texas State Board of Plumbing Examiners, and the license can be looked up on the Board's website. Chapter 1301 of the Occupations Code carves out one exception: a property owner does not need a license to do plumbing in their own homestead. That exception is about the license, and it doesn't relax the code, so a gas joint you tighten yourself still has to be tested.
Permits are set by the City of Rowlett and can change, and Texas lets each city amend the model codes by ordinance after a public hearing (Local Government Code 214.212). So we don't work from memory. For each job we confirm what Rowlett requires, pull the permit where one applies, and show it as its own line on the written quote.
10Near the shop
Where We Install Gas Heaters: Older Housing First
Our address, 5311 Boyd Boulevard, is about 0.4 miles from Main Street and 0.9 miles from the Downtown Rowlett DART station, in straight-line terms. The jobs where a gas swap most often comes with code updates are older houses, where a second or third heater is due: listing records show houses from 1983 in Dalrock Estates and from 1990 to 1998 in Lakeshore Park Estates. Newer communities such as Lake Park, Trails at Cottonwood Creek and Lake Shore Village are mostly new builds with younger heaters.
| Area | Miles | Typical house age |
|---|---|---|
| Downtown Rowlett | 0.4 | Historic downtown, mixed ages |
| Lake Park | 2.2 | New, still being built |
| Lake Shore Village | 3.4 | New Windsor Homes builds |
| Dalrock | 3.8 | 1980s and later |
| Trails at Cottonwood Creek | 5.4 | New |
11Services
All servicesRelated Water Heater Services
07Est. $3,800 - $7,500
Tank-to-Tankless Water Heater Conversion
Gas line and venting changed to suit a wall-hung tankless unit.
09Est. $1,400 - $2,900
Garage Water Heater Installation
Gas and hybrid units in the garage, with the burner raised and the unit protected.
13Guides
All guidesGuides That Go Deeper
How Long Does a Water Heater Last in North Texas?
A tank water heater usually lasts 8 to 12 years in North Texas. See how moderately hard water and maintenance change that, and when to plan a swap.
Read the guideHow to Flush a Water Heater, and Why Hard Water Matters
Flushing a tank water heater once a year clears sediment. Here are the steps, and why moderately hard North Texas water makes it worth doing.
Read the guideWater Heater in the Attic, Garage or Closet: Where Should It Go?
Compare attic, garage and closet water heater locations in Rowlett homes: access, venting, leak risk and what each placement needs to meet code.
Read the guide14FAQ
Questions People Ask About This
Question not here?
Call and ask. A straight answer and an estimated range on the call, before anybody drives over.
Call (972) 472-8210How much does gas water heater installation cost in Rowlett?
A like-for-like 40 to 50 gallon gas tank is estimated at $1,400 to $2,900. A tank that needs code updates or sits in an attic is estimated at $2,200 to $3,800. These are estimates, and the price is the written quote, which lists the unit, labor, code items, any permit and the haul-away separately.
How long does the installation take?
Most like-for-like gas swaps take 3 to 5 hours. Attic installs, moves and conversions to tankless can take most of a day because the vent, the gas line and the connections all have to be changed and tested.
How high does a gas water heater have to be in a garage?
The model residential code puts the ignition source of a gas appliance in a garage at least 18 inches above the floor, so the tank sits on a stand. A tank listed as flammable-vapor-ignition-resistant (most new ones since about 2003) can be exempt unless the maker or local code requires the height. Rowlett's adopted edition governs, and we confirm it before we quote.
Will a gas water heater work in a power cut?
It depends on the ignition. A standing pilot or thermocouple model keeps heating without power. An electronic igniter does not, and a gas tankless unit needs power for its fan and controls. Ask which type you have or are buying.
How do I know the gas connection is safe after the install?
Every gas joint is leak-tested with solution before the burner lights, and a shut-off and sediment trap go on the line. If you smell gas at any time, leave the house and call your gas utility or 911 from outside.
Should I switch from gas to electric?
Only for a reason. Gas is about 48% of U.S. main water heating fuel against 46% for electricity, so neither is odd. Switching means capping the gas line, closing the vent and adding a 240-volt circuit, and each step is a line on the quote. Gas tanks recover faster, and electric tanks avoid the vent.
Does Rowlett require a permit to replace a gas water heater?
Texas cities set their own permit rules and can amend the model codes, so we confirm what Rowlett requires for each job instead of assuming. Where a permit applies it is a separate line on the quote, and the work is left ready for inspection.
What size gas water heater do I need?
Most households of two to four people do well with 40 or 50 gallons. The useful figure is the first hour rating, how much hot water a tank delivers in an hour of heavy use, which can make a smaller gas tank match a larger electric one. Sizing starts from how many people shower at the same time.
How long does a gas tank last in Rowlett's water?
The U.S. Department of Energy gives storage tanks 10 to 15 years, and many installers plan on 8 to 12 in hard water. NTMWD's treated water is moderately hard, with sampled hardness of 122 to 160 mg/L in 2022 and 2023, so flushing yearly and checking the anode rod are the habits that matter.
What temperature should I set the heater to?
The U.S. Consumer Product Safety Commission recommends 120 degrees. At that setting an adult takes about five minutes to a third-degree burn; at 140 degrees it is about six seconds. We check the real temperature at a tap with a thermometer after every install.
Can I install a gas water heater myself in Texas?
A property owner doesn't need a plumbing license for their own homestead under section 1301.051 of the Occupations Code, but the work still has to meet code, and a gas leak is not a small mistake. If you do it, test every joint and expect the same permit rules to apply.
What happens to my old water heater?
It is drained, disconnected and hauled away on the same visit, and that removal is a line on the written quote, so you don't have to find a way to move a 100 pound tank.
15Sources
Where the Numbers on This Page Come From
Numbers on this page come from the sources below, retrieved October 2026, or from our own estimated price ranges. Where sources disagree or a figure could not be confirmed, the page says so. Distances are straight-line miles.
- City of Austin: Atmos Energy Mid-Tex presentation (June 2025)1.8 million customers, 550 communities; moderate reliability
- U.S. EIA: 2020 Residential Energy Consumption Survey, water heatingnational fuel split
- U.S. DOE Energy Saver: storage water heaters10 to 15 year life
- U.S. DOE Energy Saver: Tankless or Demand-Type Water Heatersefficiency by daily use, life expectancy
- NTMWD: Protecting Our Drinking Watermoderately hard water, 17.12 conversion
- NTMWD monthly water analysis tables, Wylie treated water, 2015 and 2022-2023total hardness in mg/L; sample months only
- NWS Fort Worth: DFW normals, means and extremes, 1991-2020temperatures, 100-degree and freeze days
- Texas DSHS: February 2021 winter storm mortality report (reported by KSAT)246 deaths statewide
- U.S. CPSC: Tap Water Scalds (publication 5098)120 degree setting, burn times
- International Code Council: model codes (IRC, IPC, IFGC)model code provisions; local adoption and amendments vary
- Warren Forensics: preventing fugitive vapor explosions by design (FVIR water heaters)2003 change; FVIR exception to the 18-inch rule; secondary source, confirm Rowlett's edition
- Texas Local Government Code 214.212cities amend the IRC by ordinance
- Texas Occupations Code, Chapter 1301 (Plumbing), section 1301.051homestead exemption
- Texas State Board of Plumbing Examinerslicense lookup
- OpenStreetMap geocodes (Nominatim), used to compute straight-line distancesdistances in this site are great-circle miles, so driving distance is longer
- Ray Hubbard Water Heaters: our own estimated price rangesestimates, not quotes; the written quote is the price
16Next step
Book Your Gas Water Heater Install
If you want gas water heater installation in Rowlett done to a written quote, call (972) 472-8210 with the age, size and location of the old tank. You get an estimated range on the call, the figure on paper before work starts, and hot water tested at the tap before we leave.