Most homeowners only think about their water heater twice in its entire life: the day it’s installed, and the day it fails. Everything in between, the unit just sits there in a closet or garage doing its job, until one morning there’s no hot water for the shower, or worse, an inch of water on the floor.
Here’s the thing: water heaters are some of the easiest appliances to keep running well, *if* you give them a little attention each year. A well-maintained tank water heater can run cleanly for 12 to 15 years. A neglected one in Central Texas’s hard water often fails at year 7 or 8, sometimes catastrophically. The difference between those two outcomes is about 30 minutes of homeowner attention per year, plus knowing what warning signs to listen for.
I’m Scott Feller. My wife Stacie and I own Koala Cooling & Plumbing here in Round Rock. Below is what every homeowner in Central Texas should know about keeping a water heater alive — what to maintain, what problems to watch for, and when it’s time to stop DIYing and call a pro.
Why Water Heaters Fail Early in Round Rock
Before we get into the maintenance, it helps to understand what we’re up against locally.
Central Texas has notoriously hard water — high in calcium and magnesium minerals. When that water gets heated, the minerals fall out of solution and form sediment that settles at the bottom of your tank. Over years, that sediment builds into an inch or two of rocky crust that:
– Insulates the burner from the water, making the unit work harder
– Creates hot spots that crack the tank’s protective glass lining
– Accelerates corrosion of the steel tank underneath
– Causes that rumbling or popping sound that homeowners often write off as normal
The single biggest reason water heaters die early in Round Rock isn’t bad equipment. It’s untreated sediment that the homeowner never knew to flush out.
Annual Maintenance: The 30 Minutes That Buy You 5 Extra Years
Here’s what every Round Rock homeowner should do once a year. None of this requires special tools or expertise. If you’re handy enough to change a furnace filter, you can do all of this.
1. Drain Several Gallons to Flush Sediment
This is the most important maintenance task, and it’s the one almost nobody does.
Turn off the power to the water heater (breaker for electric, or set the gas control to “vacation” or “pilot” for gas). Connect a garden hose to the drain valve at the bottom of the tank, and run the other end somewhere safe — a driveway or floor drain works.
Open the drain valve and let several gallons run out. The water will likely come out cloudy or even chunky if you’ve never done this before. Keep going until it runs clear. Close the valve, restore power, and you’re done.
If you’ve never flushed your tank and it’s more than a few years old, the first flush can sometimes loosen scale that clogs the drain valve. If that happens, call us — we can power-flush the tank with proper equipment.
2. Test the Temperature & Pressure (T&P) Relief Valve
The T&P valve is a critical safety feature that prevents your tank from over-pressurizing and turning into something dangerous. It’s mounted on the top or upper side of the tank with a pipe running down toward the floor.
To test it, place a bucket under the discharge pipe, then carefully lift the metal tab on the valve for a second or two and let it snap back. Water should briefly flow out and stop. If nothing comes out, or if the valve drips continuously after you let go, it needs to be replaced — and that’s a job for a plumber. A failed T&P valve is one of the more dangerous water heater issues.
3. Inspect the Anode Rod (Every 2-3 Years)
The anode rod is a sacrificial piece of metal that hangs inside your tank and slowly corrodes *instead* of your tank. It’s the single most important component for tank longevity, and most homeowners have never heard of it.
Anode rods typically need replacement every 3 to 5 years, depending on your water and how much you use. Checking it requires removing it from the top of the tank with a socket wrench — possible for a confident DIYer, but it’s also a job our techs do routinely. If your tank is more than 5 years old and the anode has never been checked, it’s worth scheduling.
If you’ve ever wondered why some water heaters last 8 years and others last 18, the answer is almost always the anode rod.
4. Insulate the Pipes and Tank
If your water heater is in an unconditioned space — garage, attic, or exterior closet — insulating the hot water lines (and adding a tank blanket) reduces heat loss and lowers your gas or electric bill. Pipe insulation sleeves cost a few dollars at any hardware store and slip on in minutes.
This isn’t a longevity item, but it’s a one-time job that pays you back forever.
5. Check the Surrounding Area Once a Quarter
Every few months, take 30 seconds to look at your water heater. You’re checking for:
– Any moisture or rust on the top of the tank or around the connections
– Water on the floor anywhere near the unit
– A drip pan that’s developed water in it
– Any visible rust on the body of the tank itself
If everything looks clean and dry, move on. If you see something concerning, it’s diagnosis time — keep reading.
Common Water Heater Problems and What They Mean
Here are the warning signs we see most often when we get called out, and what each one usually indicates.
“I’m Running Out of Hot Water Faster Than I Used To”
Most likely cause: **sediment buildup** insulating the burner from the water, so less of the tank’s volume is actually getting heated. The fix is a thorough flush, sometimes with a descaling agent. If a flush doesn’t restore performance, the tank may have permanent scale that’s eaten into the heating efficiency, and you’re approaching end of life.
Less common: a failing dip tube (the plastic tube that delivers cold water to the bottom of the tank). When it cracks or breaks, cold water mixes with the hot water at the top, and you get lukewarm output that runs out fast.
“I Have No Hot Water at All”
For a gas unit, the pilot light has likely gone out, or the gas control valve has failed. For an electric unit, one or both heating elements have failed, or the upper thermostat has tripped.
Some of these are repairable for a few hundred dollars (heating elements, thermostats). Others — particularly a failed gas control valve on an older unit — get into territory where replacement makes more sense than repair.
“The Water Is Too Hot — It’s Scalding”
The thermostat is set too high, has malfunctioned, or has been bumped. Most water heaters should be set around 120°F, which is hot enough for daily use but safe for kids and elderly skin. Higher than that — particularly above 130°F — creates real burn risk.
If turning the dial down doesn’t reduce the water temperature, the thermostat may be stuck and needs replacement.
“The Tank Is Making Loud Rumbling, Popping, or Banging Sounds”
Almost always sediment. The popping sound is steam bubbles forming under the layer of crusty mineral deposits at the bottom of the tank, then breaking loose. It’s not immediately dangerous, but it’s a sign the tank is being slowly damaged from the inside, and the fix is a thorough flush.
If you’ve never flushed the tank and it’s making serious noise, call us. We may be able to save it; if the sediment has hardened beyond what a standard flush can clear, we can power-flush with stronger equipment.
“My Hot Water Smells Like Rotten Eggs”
This one is common enough we wrote a whole separate guide on it: Hot Water Smells Like Rotten Eggs? Here’s What to Do. Short version: it’s usually the anode rod reacting with sulfate-reducing bacteria. The fix is replacing the magnesium anode with an aluminum-zinc or powered anode and sanitizing the tank.
“The Water Is Discolored or Rusty”
Rusty hot water that runs clear after a minute is usually old sediment getting stirred up — drain the tank fully and see if it stops.
Rusty water that doesn’t clear up, or rusty water that comes out of both hot and cold taps, points to a different issue: either rust inside your tank itself (which means the inside is corroding and the tank is approaching failure) or rust in your home’s incoming water lines. Either way, it’s call-a-pro time.
“The Water Temperature Keeps Fluctuating Hot and Cold”
When the water can’t seem to make up its mind — comfortable for a minute, then suddenly cold, then hot again — it usually points to one of three things: a failing thermostat that’s not maintaining a steady setpoint, sediment that’s affecting heating consistency by insulating part of the burner from the water, or a cracked dip tube letting cold water mix where it shouldn’t.
On electric units, an intermittent heating element (one of the two has failed and the other is keeping up partially) creates the same fluctuating pattern. None of these are DIY-friendly diagnoses — if your hot water can’t decide what it wants to be, give us a call.
“My Energy Bill Has Crept Up and I Can’t Figure Out Why”
A water heater quietly losing efficiency is one of the most common — and most overlooked — sources of rising utility bills. As sediment builds and components wear, your unit has to run longer and harder to deliver the same amount of hot water. The increase is usually gradual enough that you don’t notice month over month, but if you compare your bill to the same month two years ago and it’s significantly higher with no other explanation, your water heater is a likely suspect.
Other possibilities to rule out: a thermostat malfunction causing the unit to run constantly, or a hidden hot water leak somewhere in your home that’s making the heater work overtime to keep up. Either way, an inspection will tell you whether the bill creep is fixable through maintenance, or whether you’re approaching replacement territory.
“Water Is Pooling Around the Base of the Unit”
This is the one you can’t ignore. Pooling water means a leak, and a leak in a water heater rarely fixes itself — it usually gets worse fast. Possible sources, from least to most serious:
– Loose connection at one of the supply or hot water lines (cheap fix)
– A failing T&P valve dripping (moderate fix)
– Drain valve at the bottom not fully closed or leaking (cheap fix)
– A leaking tank (the unit needs to be replaced — and quickly, before it ruptures)
If the leak is from the tank itself, shut off the water supply and the power immediately and call a plumber. A failed tank can release 30+ gallons of water into your home in a hurry.
“The Pilot Light Won’t Stay Lit” (Gas Units Only)
Usually a failed thermocouple or a clogged pilot orifice. Both are repairable for a couple hundred dollars on a unit that’s otherwise in good shape. On a 12-year-old unit, it’s often a sign of broader gas control issues, and replacement may be the better investment.
When to Repair vs. Replace
This is the most common question we get on water heater calls, and the honest answer depends on three things: age, severity, and economics.
Repair is usually the right call when:
– The tank is under 8 years old and in good condition
– The fault is a single component (heating element, thermostat, anode rod, T&P valve, thermocouple)
– There’s no sign of tank corrosion or leakage
– The repair cost is under 30-40% of replacement cost
Replacement is usually the right call when:
– The tank is over 10 years old and showing significant problems
– The tank itself is leaking (not just connections)
– You’re getting rust or significant discoloration in the hot water
– Multiple components are failing at the same time
– The repair cost is approaching half the cost of new equipment, especially on an older unit
If your tank is somewhere in the gray zone — say, 9 years old with one failing component — we’ll tell you the truth about which way the math points. Sometimes the right answer is “fix this one thing and it’ll buy you another 3-5 years.” Sometimes it’s “you’re going to spend half the cost of a new unit chasing repairs over the next 18 months — replace it now.”
When You Should Definitely Call a Pro
Some water heater situations aren’t DIY territory, no matter how handy you are. Call us right away if:
– You see water pooling around the base of the unit
– You smell gas anywhere near the heater (turn off the gas at the meter and call us — and the gas company — immediately)
– The T&P valve is leaking continuously or doesn’t release water when tested
– The tank is making severe banging or knocking sounds
– The unit is over 10 years old and showing any new problems
– You’re getting rusty water that doesn’t clear after a long flush
– You attempted maintenance and now something’s not working right
We’re licensed, insured, and our techs live in the same neighborhoods you do. Same-day appointments are usually possible during normal business hours, and after-hours emergency service is available when the situation can’t wait.
How the Koala Club Makes This Easy
Honestly, most homeowners aren’t going to flush their water heater every year. Life is busy, and “drain the tank” is the kind of task that gets pushed to next weekend until it’s been five years.
That’s a big part of why we built the Koala Club to take the maintenance off your plate. Members get an annual water heater flush (as long as the unit is less than 7 years old) and a full water heater inspection regardless of age, plus the same annual care for your HVAC system. We track the dates, schedule the visits, and keep records of everything we find.
It’s not just convenience. Documented annual maintenance is what keeps your manufacturer’s warranty valid, what catches small problems before they become floor-soaking failures, and what genuinely buys you those extra 3 to 5 years of useful life from a well-maintained tank.
Thinking About Tankless? Here’s the Honest Comparison
If your current water heater is approaching end of life and you’re weighing options, tankless is worth considering — but it’s not the right answer for every home. We covered the full comparison in **[Tankless vs. Tank Water Heaters: Which Is Right for Your Home?](https://koalacooling.com/tankless-vs-tank-water-heaters/)** — including pricing, hot water capacity, installation considerations, and the honest cases where tank wins over tankless.
The Bottom Line
A water heater isn’t a magic appliance — it’s a steel tank holding hot water and a few simple components that need occasional attention. Give it the 30 minutes a year it deserves, listen for the warning signs above, and call us when something’s beyond DIY territory. Done right, your water heater will run cleanly for 12-15 years and deliver hot water on demand without you ever having to think about it.
If you’re due for a flush, dealing with a problem from the list above, or just want a professional set of eyes on a unit you’re not sure about, our Plumbers are local, licensed, and ready to help. Every visit is backed by our 100% Satisfaction Guarantee — the only one in Central Texas we know of where, if you’re not satisfied, we hand you a check for 100% of what you paid us.
Get Started or Learn About the Koala Club | (512) 759-8800
We’re at 1102 S Industrial Blvd, Suite C-D, in Round Rock. Stop by anytime — we are, after all, **Koala-fied**.
— Scott