When a new water heater beats a repair
Water heater replacement in Cibolo, TX is the right call when the tank itself has failed, or when repairs would cost more than the unit is worth. A leaking tank body cannot be patched, because the steel liner has rusted through. Everything else on a heater can usually be fixed, which is covered on the repair page.
Age is the other signal. Tank heaters often last roughly 8 to 12 years, as general trade knowledge. A unit near the top of that range that needs a part is a candidate for replacement, because the next failure is likely close behind. Rust at the base, heavy scale in the drain water and repeated noises point the same way.
Planned swaps, where the old unit still works, are handled under water heater installation. Think about your household, too. If the family has grown and the old tank runs out of hot water, a larger or different unit may solve a problem that repairs cannot.
Failed tank emergency: what to do right now
If the tank has failed and water is on the floor, shut off the cold water supply to the heater first. The shutoff valve is on the pipe that enters the top of the tank. Turn it clockwise until it stops. Then turn off power at the breaker for an electric unit, or set a gas unit to off, but only if it is safe to reach and the floor around it is dry.
Do not wade through water to a breaker panel. If water is near the panel, leave it and call. If you smell gas, leave the building and call 911 and the gas utility from a safe distance, and never wait for a plumber to deal with gas. Our line is open nights, weekends and holidays, and a licensed plumber is dispatched for same-day appointments when available.
Sizing a new water heater for your household
Tank size is chosen from how many people use hot water and how much at once. These are rules of thumb, not promises, and the plumber confirms on site.
| Household | Typical tank size | Notes |
|---|---|---|
| One or two people | About 30 to 40 gallons | Fine if showers are not back to back |
| Three or four people | About 40 to 50 gallons | A common size for a family home |
| Five or more, or a large tub | About 50 to 80 gallons | Back-to-back showers and big soaking tubs drain a tank quickly |
Look at the first-hour rating on the label, not only the tank size. It tells you how much hot water the unit delivers over its first hour of use, and it matters more than gallons in storage. The physical space matters too. A new tank may be taller or wider than the old one, and it has to fit in the closet, the garage or the attic platform with room for the relief valve line.
Gas, electric or heat pump
Each fuel has real trade-offs, and the best choice depends on what is already in your home.
Gas units heat quickly and recover fast, so they handle large households well. They need a gas line, a vent to carry exhaust out and enough air for combustion. They cost less to run where gas is available, but the installation is more involved.
Electric tanks are simple to install, with no vent and no combustion. They need the right circuit and breaker. They recover more slowly than gas, so the tank size matters more.
Heat pump, or hybrid, units pull heat from surrounding air to warm the water, and they use less electricity than a standard electric tank. They need space, because they are taller and need airflow, and they can be noisy and cool the room around them. They cost more to buy, and they have condensate to drain. Ask the plumber about the space and the drain before choosing one.
Switching fuels, for instance from gas to a heat pump, can mean new wiring, a new drain and capping the old gas line. It is a bigger job than a like-for-like swap, and the quote should say so.
Venting, combustion air and gas safety
A gas water heater burns fuel, and the exhaust has to leave the building. The vent connects to the top of the unit and runs up through a flue or out through a wall. If the vent is loose, rusted, sloped wrong or blocked, exhaust can spill into the room. That is a safety problem, not a comfort issue.
Combustion air is the other half. A burner needs enough fresh air, so a heater in a closed closet needs openings or ducting. A vent that must be rerouted, because the new unit is in a different spot or is a different type, adds work and parts. Ask whether your swap needs it.
If you ever smell gas near the heater, do not troubleshoot. Leave the building and call 911 and the gas utility from a safe distance. We never promise a response time for a gas leak.
Expansion tank, relief valve and drain pan
Three parts matter for safety and for the life of the heater. Ask about all three.
Thermal expansion is what happens when water heats and takes up more space. If your plumbing is a closed system, with a check valve or pressure reducing valve on the main, the extra volume has nowhere to go and pressure rises. An expansion tank absorbs it and protects the tank and fixtures.
The temperature and pressure relief valve opens if the tank gets too hot or the pressure climbs too high. It needs a discharge line to carry the water to a safe place. Never cap, plug or restrict it. The City of Cibolo enforces the 2021 International Plumbing Code (IPC), and relief valve discharge lines are part of correct installation.
A drain pan under a heater in an attic or on an upper floor catches leaks and carries them to a drain. It gives a failing tank somewhere to leak besides your ceiling.
Heater down and water on the floor?
Call the 24/7 line. A licensed plumber is sent out, and you hear the price before work starts.
How the swap goes on the day
Every install follows a sequence. Knowing it helps you see what you are paying for.
- Shut off the water supply, and the gas or power to the unit
- Drain the old tank to a safe point
- Disconnect the water lines, vent, gas line or wiring
- Remove the old unit and set the new one on its pan or stand
- Connect the water lines, relief valve, discharge line and expansion tank if one is needed
- Reconnect or replace the vent and gas line, or the electrical supply
- Fill the tank and open a hot tap to purge air from the system
- Light the pilot, or power the unit, and set the temperature
- Test for leaks, check venting and confirm the burner or elements work
Complications such as a rerouted vent, a corroded shutoff valve or a new circuit can add time, and the plumber should tell you how long the job will take and when something changes.
What to ask about in your quote
A quote is more than a price. These items often make the difference between quotes that look similar.
- Is removal and disposal of the old unit included
- Are code items such as the expansion tank, drain pan, new shutoff valve and discharge line included
- Is any venting or gas line work needed, and is it priced in
- What does the warranty cover, who provides it and will you get the paperwork
- Does the quote show the plumber's licensing information
Texas plumbers are licensed by the Texas State Board of Plumbing Examiners (TSBPE). Ask for the Responsible Master Plumber number, which begins with an M, and check it in the TSBPE online license search. An estimate or invoice should show it, along with TSBPE contact information.
Permits and your city
Permit rules vary, so ask the City of Cibolo building department whether a water heater replacement needs a permit at your address. Do not assume either way. A reputable plumber can tell you what they plan to do so you know what to ask. If you live in a nearby town such as Schertz or Converse, ask that city instead, since the rules are set locally.
What affects the price of a new water heater
Type and size of unit
A larger tank or a heat pump model costs more than a basic tank of the same fuel.
Many homeowners policies cover sudden and accidental water damage from a burst tank, but not the heater itself or wear and age. Ask your insurer what applies and keep photos. You get a clear price before work starts. If the plumber finds something once the old unit is out, such as a corroded valve, you hear it before the work continues.
What to do before the plumber arrives
Close the cold supply
Turn the valve above the heater clockwise until it stops. If it will not turn, shut off the main water valve instead.
Shut off power or gas
Switch off the breaker for an electric unit only if the floor near the panel is dry. For gas, set the control to off only if it is safe.
Clear the area
Move boxes, stored items and anything else that blocks access to the heater, vent and pan.
Photograph the label
The rating plate shows the model, fuel, capacity and age. That helps the plumber bring the right parts.
Questions about water heater replacement
A tank that fails on a Saturday night still gets an answer, since the line runs all day and all night, and a licensed plumber is dispatched with same-day appointments when available. No arrival time is promised, so use the wait to read the label on your tank for its capacity and fuel type, which helps the dispatcher plan the right unit.
Shut the cold supply valve if it is leaking. The price for the new unit and its installation is stated clearly before work starts.
Often yes, but it is a larger job than a like-for-like swap. It may need new wiring, space for airflow and a condensate drain, and the old gas line has to be capped. Ask for those items in the quote. For a different approach, see tankless water heaters.
It depends on how many people live in the home and how much hot water you use at once. As a rule of thumb, a household of three or four often uses a tank of about 40 to 50 gallons. The plumber confirms on site.
If your plumbing is a closed system, yes. Heated water expands, and the tank gives that extra volume somewhere to go. Without it, pressure can rise and strain the heater and fixtures. The plumber checks your setup.
Ask. Removal and disposal is often part of a replacement but not always included. Get it confirmed in the quote before work starts.
A leak from the tank body means replacement. A failed part on a younger unit is often worth repairing. The repair page explains how each symptom is checked.