03Est. $3,800 - $7,500
Tankless Water Heater Installation
Wall-hung units sized by flow rate, with the gas line and vent worked out up front.
1996Year Rowlett High School opened, with Marlene Hammerle as its first principalWikipedia / NCES
2,286Students enrolled in 2023-24, per NCESWikipedia / NCES
16.01Student-to-teacher ratio, with 142.8 full-time-equivalent teachersWikipedia / NCES
2.9Average people per household in the 2020 census (62,535 residents / 21,494 households; our division)Wikipedia
37.4%Share of Rowlett households with children under 18Wikipedia
Short answer
Water heater installation near Rowlett High School covers homes around 4700 President George Bush Highway, where the Garland ISD school opened in fall 1996 and enrolled 2,286 students in 2023-24. Rowlett households average about 2.9 people, but a house with teenagers peaks higher. Our shop is 1.6 miles away, and a tank is estimated at $1,400 to $3,800.
01The school
What We Can Verify About Rowlett High School
Rowlett High School is a Garland ISD school at 4700 President George Bush Highway, which opened in fall 1996 with Marlene Hammerle as its first principal. It serves grades 9 to 12 and enrolled 2,286 students in 2023-24 according to NCES, with 194 staff, 142.80 full-time-equivalent teachers and a student-to-teacher ratio of 16.01. Its teams are the Eagles, in maroon, and it competes in UIL Class 6A, District 9. Wikipedia notes that many Rowlett students are zoned to Sachse High School, and Rockwall ISD residents attend Rockwall High School, so the school doesn't serve the whole city.
Wikipedia's figures for attendance and demographics date from 2009, so we don't use them.
02Household numbers
Rowlett's Households, and Where Teenagers Fit
The 2020 census counted 62,535 people in 21,494 households, which divides to about 2.9 people per household, and 37.4% of households had children under 18. Under-18s were 23.4% of the population and people 65 and over 12.8%. Those are averages across the whole city, and the heater in a particular house meets the household's peak, not its average.
A household of four with two teenagers and two adults, all showering between 6:30 and 7:30 on school mornings, loads a heater more heavily than a household of four whose members shower at different times. The numbers that matter are the first hour rating on the energy label and how many people use hot water in the same hour.
| Measure | Figure |
|---|---|
| Population | 62,535 |
| Households | 21,494 |
| Households with children under 18 | 37.4% |
| Under age 18 | 23.4% |
| Age 65 and over | 12.8% |
03Sizing
A Sizing Table for Households With Teenagers
Our rule of thumb gives one or two people 30 to 40 gallons, three or four 40 to 50, and five or more 65 gallons or more. Teenagers push a household one band up in practice, because they shower longer and at the same hour. This table applies that to common household shapes. It is our guidance, not a measurement, and the first hour rating matters more than the gallons.
| Household | Peak behavior | Starting point |
|---|---|---|
| 2 adults | Showers in sequence | 30 to 40 gallons |
| 2 adults, 1 teenager | Two showers overlap in the morning | 40 to 50 gallons |
| 2 adults, 2 teenagers | Three or four showers in one hour | 50 gallons, or 65 if the first hour rating is low |
| 2 adults, 3 teenagers | A long, heavy morning | 65 to 80 gallons, or a tankless setup sized for it |
For a tankless unit, three showers at WaterSense's 2.0 gallons a minute plus a bathroom tap at 1.5 makes 7.5 gallons a minute, and at a 65-degree rise that needs 243,750 BTU an hour. That is more than a single residential gas unit's 199,900 BTU input, so a house like that may want a large tank or two units. The sizing guide explains the working.
Need Water Heater Installation Near Rowlett High School?
Tell us how many people shower in the morning and you get an estimated range on the call.
04Water
Teen-Sized Loads Meet Hard Water
A heater working harder scales faster. Rowlett's water, from the North Texas Municipal Water District, is moderately hard, with sampled hardness of 122 to 160 mg/L in 2022 and 2023, which is 7.1 to 9.3 grains per gallon. A tank that heats a lot of water each day, in a hard-water area, should be flushed once a year and have its anode rod checked in the third to fifth year. The flushing guide has the steps.
05Neighbors
What's Near the School, and How Far
The school sits beside the Wet Zone and Pecan Grove Park, a few tenths of a mile from each, and within about a mile of the station and the library.
| Place | Miles from the school |
|---|---|
| Rowlett Wet Zone | 0.2 |
| Pecan Grove Park | 0.3 |
| Downtown Rowlett station | 0.7 |
| Rowlett Public Library | 0.7 |
| Paddle Point Park | 1.1 |
| Lake Park | 1.2 |
| Our shop, 5311 Boyd Blvd | 1.6 |
06Costs
What It Costs to Size Up
Going from a 40-gallon tank to a 50 or 65 is a modest change in a like-for-like swap, estimated at $1,400 to $2,900 in all, and the size is chosen before the unit is ordered. A tank with attic access or code updates is estimated at $2,200 to $3,800, and a tankless conversion at $3,800 to $7,500. If the cold-water morning is the complaint, the cheapest fix is often a bigger tank, and the second cheapest a second small heater near the far bathroom.
07Booking
From Our Shop to Your House
Our shop is 1.6 miles from the school in a straight line. The quote comes in writing before the old heater is touched, and Texas requires the work to be done by a plumber licensed through the State Board of Plumbing Examiners. We confirm Rowlett's permit rule for each address and show any permit as its own line.
08Services
All servicesRelated Water Heater Services
05Est. $1,400 - $3,800
Water Heater Replacement
Like-for-like swaps and size changes, with the old heater drained and hauled away.
06Est. $1,400 - $2,900
Same-Day Water Heater Installation
Often possible for like-for-like tank swaps when the unit is in stock.
09Nearby
All areasNearby Rowlett Areas
10Guides
All guidesGuides That Go Deeper
What Size Water Heater Do You Need?
How to size a water heater for your household, from 40 to 80 gallon tanks to a tankless unit's flow rate, and why the old tank's size is not a rule.
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 guideTank vs Tankless Water Heater: Which Is Right for Your Rowlett Home?
A plain comparison of tank, tankless and hybrid water heaters for Rowlett homes: cost, space, hot water supply, upkeep and who each one suits.
Read the guide11FAQ
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) 472-8210Where is Rowlett High School?
At 4700 President George Bush Highway in Rowlett, in Garland ISD. It opened in fall 1996.
How many students attend?
2,286 in 2023-24, according to NCES, with a student-to-teacher ratio of 16.01.
Do all Rowlett students attend Rowlett High School?
No. Wikipedia notes many are zoned to Sachse High School, and residents of the Rockwall ISD part attend Rockwall High School.
How many people live in a typical Rowlett household?
About 2.9, from 62,535 residents in 21,494 households in the 2020 census, and 37.4% of households have children under 18.
What size heater does a house with teenagers need?
Often a band up from the average: 40 to 50 gallons for one teenager, 50 to 65 for two, and 65 to 80 or a tankless setup for three.
Can one tankless heater run three showers at once?
Often not. Three showers at 2.0 gallons a minute plus a tap at 1.5 need about 243,750 BTU an hour at a 65-degree rise, more than a 199,900 BTU unit supplies.
What matters more, gallons or first hour rating?
The first hour rating, which is the hot water a tank delivers in an hour of heavy use. A 40-gallon gas tank can match a 50-gallon electric one.
Does a heavy hot-water load shorten a tank's life?
A tank that heats more water scales faster in hard water. NTMWD's sampled hardness was 122 to 160 mg/L in 2022 and 2023, so a yearly flush matters.
How much does water heater installation cost near the school?
A like-for-like tank is estimated at $1,400 to $2,900, and a tank with code updates or attic access at $2,200 to $3,800.
How far is your shop from the school?
About 1.6 miles in a straight line from 5311 Boyd Boulevard.
Could a second small heater help a far bathroom?
Yes. It is often cheaper than a bigger tank and shortens the wait for hot water. We quote both.
Do I need a permit for a heater swap near the school?
Texas cities set their own permit rules, so we confirm what Rowlett requires. Any permit is its own line on the quote.
12Sources
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.
- Rowlett High School (Wikipedia)opening year, address, enrollment
- Rowlett, Texas (Wikipedia)history, 2020 census, schools, Sapphire Bay plans
- U.S. EPA WaterSense: showerheads and bathroom faucetsWaterSense flow limits: showerheads 2.0 gpm, bathroom faucets 1.5 gpm
- 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
- Texas State Board of Plumbing Examinerslicense lookup
- Our own calculation, with the formula shown on the pagearithmetic from standard dimensions and physical constants; no external data
- 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
13Next step
Book Your Water Heater Install Near the High School
For water heater installation near Rowlett High School, call (972) 472-8210 and tell us how many people shower in the morning. You get an estimated range on the call, a written quote before any work, and hot water tested at the tap before we leave.