Water Heater FAQs for Texas Homeowners

We work out of three Texas offices. The Garland office covers the Dallas–Fort Worth area, including Dallas, Fort Worth, Plano, Frisco, Irving, and Arlington. Round Rock covers Austin, Georgetown, Pflugerville, Cedar Park, and Leander. San Antonio covers Boerne, Helotes, Schertz, New Braunfels, and San Marcos. Every office answers seven days a week, 5 AM to 11 PM, and every job — repair, replacement, or new install — comes with a warranty.

Yes. Plumbers in Texas are licensed by the Texas State Board of Plumbing Examiners (TSBPE), and Rainstone’s work is performed under Kurt Pinkerton, our Responsible Master Plumber, Lic. # M-21546. Kurt has spent 38 years in the trade, 27 of them as a master plumber. The company is licensed and insured, and where a job needs a city permit, the work is permitted and inspected under that license.

Yes — same-day repairs are the norm across all three service areas, for tank and tankless systems, gas or electric. Call during our service hours, 5 AM to 11 PM any day of the week, and we will diagnose the problem and give you a written quote before any work begins. Leaks and no-hot-water calls are treated as emergencies inside those hours.

Tank and tankless, gas and electric, in homes and in commercial buildings — repairs, replacements, new installations, maintenance, inspections, and leak detection. If it heats water in a Texas building, it is in our lane. That narrow focus is deliberate: it means the technician at your door does this work every day.

The $125 service call gets a licensed technician to your home to diagnose the whole system — not just the symptom you called about — and to give you a written quote before any work starts. If you go ahead with a replacement, the $125 is waived in full: you pay for the replacement, not the visit. If you decide against the replacement, the $125 covers the diagnosis and the written quote, and both are yours to keep.

A standard tank installation typically runs $1,850 to $2,800. Replacement tiers start at $1,850, and $2,450 steps up to an upgraded tank with an expansion tank. A tankless installation typically runs $4,800 to $6,000. The price includes removal and disposal of your old unit and a code-compliant install. Your final number depends on the equipment, parts, and site conditions, and it is always confirmed in a written quote before work begins.

Yes. We diagnose first, walk you through the price in writing, and only then start work — no surprise charges once the job is done. The things that can shape a quote are the unit type and size, the parts your system needs, installation complexity like venting changes or tight access, and the condition of the existing plumbing.

It depends on the part, and every repair is quoted upfront after diagnosis, before we pick up a wrench. As a real example from our pricing page: a gas control valve replacement runs $615. Most repairs take one to two hours once the part is in hand. And remember the service call math — approve the replacement and the $125 diagnostic fee is waived in full.

Emergency and after-hours visits carry an additional service fee, and it is always confirmed with you before we dispatch — never added quietly afterward. Our regular service window covers most situations to begin with: 5 AM to 11 PM, seven days a week.

That noise is sediment. Texas water is mineral-heavy — drawn from the Edwards Aquifer in San Antonio, out of limestone country in Central Texas, and across the Dallas–Fort Worth area — and those minerals settle at the bottom of the tank. Water trapped under the sediment boils and pops its way out, which is the rumbling you hear. It also costs you efficiency and years of tank life. A flush can quiet a moderately scaled tank; heavy buildup in an older unit usually means replacement is the honest conversation.

On a gas unit, the usual suspects are a pilot light that’s out, a failing thermocouple or flame sensor, or an interrupted gas supply. On an electric unit, look for a tripped breaker, a burned-out heating element, a bad thermostat, or a high-limit switch that cut power after overheating. Checking the breaker or confirming the gas is on is a safe first step. Beyond that, gas and electrical diagnosis is technician work — that’s what the $125 service call is for, and it’s waived in full if we do the replacement.

First, shut off the water supply to the unit — there’s usually a valve on the cold line above it — and turn off the power at the breaker or the gas valve if you can do it safely. Then call us; we answer 5 AM to 11 PM, seven days a week. Where the leak comes from decides the fix: a fitting, valve, or connection can often be repaired, but water seeping from the tank body itself means internal corrosion, and that means replacement — the sooner it’s planned, the less water damage you gamble with.

Winter Storm Uri taught Texas that “it doesn’t freeze here” is not a plan. Before a hard freeze: insulate exposed lines in garages, attics, and exterior closets — the pipes freeze before the tank does — seal drafts around the unit without blocking a gas heater’s combustion air, keep the garage door closed, and know where your main shutoff is. Tankless units on outside walls are the most vulnerable. And never cap a relief-valve discharge line to “protect” it; that line has to stay open. If a line does freeze or burst, shut the water off and call us.

That sulfur smell is usually hydrogen sulfide gas, produced when sulfate-reducing bacteria in the water react with the tank’s anode rod. It shows up most with well water and in heaters that sit unused for long stretches — a guest-house unit out in the Hill Country, say. The fixes are disinfecting and flushing the tank, or switching the anode rod to a different material. If the cold water smells too, the source is the water supply itself, not the heater, and it needs a different fix.

Every permit and inspection on a Rainstone job runs through my license — I’m Kurt Pinkerton, Responsible Master Plumber, Lic. # M-21546 — so this one lands on my desk. In most Texas cities, yes: replacing a water heater takes a permit, because the job touches gas lines, venting, electrical, and pressure relief, and the new unit has to meet today’s code, not the code from when your house was built. In Garland, the residential permit is $150 plus a 4.5% technology surcharge, and the city requires the work to be done by a state-licensed master plumber registered with the City of Garland. My honest take: a contractor who offers to skip the permit is offering to skip the inspection too, and I won’t put my license behind an uninspected gas connection. When we replace your heater, the permit is pulled, the inspection is passed, and the paperwork is part of the job, not an extra.

— Kurt Pinkerton, Responsible Master Plumber, Lic. # M-21546

Watch for the pattern, not just the breakdown. The clearest signs: water leaking or seeping from the tank body; rust on the tank or its fittings; hot water — and only the hot water — running rusty; repairs arriving more often, on different parts; and age. A tank heater commonly lasts 8 to 12 years in Texas water, less if it’s never been flushed. When repair bills start approaching a real share of a replacement’s price, the math has usually decided. Our full guide to the warning signs is on the blog, and a $125 service call gets you a straight read on your specific unit.

A straightforward tank-for-tank replacement in the same spot usually takes three to five hours, including removing and disposing of the old unit. A tankless installation runs four to seven hours, and jobs that change fuel type, move the unit, or need venting or code updates take longer. Either way, the permit and inspection are part of the schedule we give you — not a surprise at the end.

Texas treats this as licensed work. In Garland, a homeowner working on their own homestead can pull a permit, but everyone else must use a state-licensed master plumber registered with the city — and the inspection applies either way. There’s a practical reason behind the rule: a water heater connects to gas or high-voltage electrical, venting that carries carbon monoxide, and a pressure relief system — four ways a small mistake becomes a dangerous one. A permitted, inspected install also protects you when you sell the home or file an insurance claim. Our installs are done under Kurt Pinkerton’s master license, Lic. # M-21546.

Tankless heats water only when you call for it, so there’s no tank to run out of — and a tankless unit commonly lasts 15 to 20 years with proper care, against 8 to 12 for a tank. The trade-offs are price and upkeep: $4,800 to $6,000 installed, against $1,850 to $2,800 for a standard tank, and in Texas hard water a tankless unit needs regular descaling to protect its heat exchanger. Sized right — by the flow your household actually demands at peak — it’s a strong fit for big families and tight spaces. We’ll size it honestly either way.

After 38 years in this trade — 27 of them as a master plumber — I can tell you the calendar matters more in Texas than almost anywhere. Our water is hard in every area we serve: San Antonio draws from the Edwards Aquifer, Central Texas sits on limestone, and Dallas–Fort Worth water lays down sediment of its own. My standard is simple: a tank gets flushed once a year, and a tankless unit gets descaled once a year, whether it “seems fine” or not. By the time a tank starts rumbling, the sediment has already been stealing efficiency and years for a long while. That’s why the annual visit matters — the flush and descaling handled on schedule, every year, is what keeps a good unit good. Maintenance is the cheapest water heater you’ll ever buy.

— Kurt Pinkerton, Responsible Master Plumber, Lic. # M-21546

Every job comes with a warranty — that’s the short version. Repairs and maintenance carry our workmanship warranty. Installations carry the workmanship warranty plus the manufacturer’s warranty on the equipment itself. The coverage for your specific job is stated in your written quote, before you approve anything.

An anode rod is a sacrificial metal rod inside the tank that draws the corrosive action of the water to itself, so the water attacks the rod instead of the tank lining. In mineral-heavy Texas water, rods are consumed faster than the national average — and once a rod is used up, the tank itself starts corroding. Checking the rod is part of a proper inspection, and replacing a spent rod is cheap insurance against replacing the whole tank years early.