Noticing puddles of water around your hot water heater can be alarming, especially when you rely on heated water for daily tasks like bathing, cooking, and cleaning. A leaking water heater tank may point to issues ranging from loose fittings to internal corrosion, and ignoring the problem can lead to costly damage.
Understanding why your system is leaking is the first step to protecting your home and restoring dependable access to heated water. In this blog, we address the most common causes of leaking water heaters and what to do if you find yourself in such a situation.
Our licensed plumbers at Lex Plumbing in Carrollton, TX, provide same-day water heater repair across Dallas–Fort Worth. Call (972) 217-8955 or contact us online to schedule reliable, professional help today.
Is a Leaking Water Heater Dangerous?
Yes, a leaking water heater can lead to serious problems. A hot water tank leak may result in water damage, mold growth, or electrical hazards if water reaches your electric panel or power supply. A faulty pressure relief valve or high pressure inside the tank increases the risk of a rupture.
Even a small leak needs immediate attention. Call a professional plumber at Lex Plumbing for trusted Carrollton water heater services and to stop water heater issues before they worsen.
How To Tell if Water Heater is Leaking
A leaking water heater can show early warning signs that are easy to miss. Watch for:
- Damp floors or puddles near the hot water tank
- Moisture around pipe fittings, the drain valve, or the cold water inlet
- Hissing or running water sounds when all faucets are off
- Reduced hot water output or inconsistent temperature
- Water discharging from the temperature and pressure relief valve
If you notice these signs, call a licensed plumber to inspect the system and prevent water damage or heater failure.
What Does it Mean When Your Hot Water Heater is Leaking?
A leaking water heater usually indicates a performance or safety issue. Common causes include a loose drain valve, excess pressure, worn inlet or outlet connections, or internal corrosion in the tank. These problems can reduce energy efficiency, increase utility bills, and shorten the system’s lifespan. Mineral buildup and a worn anode rod can worsen corrosion and damage internal parts like the drain valve.
Corroded Water Heater Tank
Tank corrosion happens gradually due to poor water quality or a failing anode rod. Over time, rust eats through the metal, creating leaks. If you see rust-colored water or hear popping noises, it’s time to consider professional service or replacement.
Loose or Faulty Drain Valve
A loose drain valve represents one of the most common reasons a heater leaks from the bottom. If tightening fails to stop the leak, we may need to replace the old valve. Our licensed DFW plumbers can install a new valve to restore proper sealing.
Faulty Temperature & Pressure Relief Valve
The temperature and pressure relief valve (T&P valve) protects the water heater from unsafe pressure levels. If the valve is leaking, stuck, or worn out, it may continuously release water. A new T&P valve may be required to maintain safe operation.
Leaking Inlet or Outlet Connections
Leaking water supply lines or loose pipe fittings around the cold water inlet or hot water outlet are frequent leak points. Over time, shifting connections and worn seals can allow water to escape. A plumber can tighten connections or replace damaged components.
Cracked or Damaged Internal Components
Electric water heaters have internal heating elements and seals that can crack due to age or heat stress. If you notice leaking near the heating element or control panel, it may indicate internal damage that needs immediate repair.
Excess Pressure or High Water Temperature
A malfunctioning thermostat or a spike in cold water pressure can lead to high internal pressure. This can force water out of the relief valve or expansion tank. A pressure-reducing valve may help balance pressure and protect the unit.
Old Age (10+ Years)
Most water heaters last 8 to 12 years with routine care. If yours is over 10 years old and showing signs of rust, inconsistent hot water, or recurring leaks, it’s likely time to replace the unit. Aging systems also experience sediment buildup, weakened components, and added strain on hot water pipes, increasing the risk of failure.
Water Heater Leaking From Bottom
Why is My Water Heater Leaking From the Bottom?
Mineral deposits or corrosion inside the tank can form cracks near the base, especially if a bad anode rod fails to protect the steel lining. A loose or faulty drain valve may also leak. These issues require urgent repair to avoid structural damage.
What To Do if Water Heater is Leaking From Bottom
Shut off the cold water supply, then turn off the power at the correct breaker (for electric units) or close the gas shut-off valve (for gas systems). Dry the area and contact a local Lex Plumbing. A plumber will recommend repair or replacement if the tank is cracked or the drain valve fails.
Water Heater Leaking From Top
Why is My Water Heater Leaking From the Top?
Loose pipe connections or worn outlet fittings are the most common causes. High pressure or thermal expansion can also trigger temperature and pressure relief valve leaks. A plumber will determine if the problem stems from fittings, valve failure, or internal pressure.
What To Do if Water Heater is Leaking From Top
Shut off the cold water supply, then turn off the power at the breaker (electric heater) or close the gas supply valve (gas heater). Dry the area and call Lex Plumbing. Common solutions include tightening fittings, replacing seals, or installing a new relief valve.
What To Do if Water Heater is Leaking
Start by turning off the water supply. Then, switch the circuit breakers to the off position for an electric heater or close the gas supply valve for gas units. Don’t attempt repairs yourself; pressure buildup can be dangerous. Instead, call a licensed plumber to diagnose and fix the leak safely.
How To Stop a Water Heater From Leaking
Schedule regular maintenance to flush the tank, remove sediment buildup, check the anode rod, and inspect for leaks. Preventive care helps prevent leaks in the future, improves system efficiency, and extends the life of your water heater.
Can a Leaking Water Heater Be Fixed?
Yes. A licensed plumber can repair the leak from a drain valve, T&P valve, or loose connections. Fixable leaks are common in units under 10 years old with proper maintenance.
How To Fix a Leaking Water Heater
Repairs may include tightening pipe fittings, replacing the T&P valve, or installing a new anode rod. A professional plumber should complete all repairs to ensure safety and restore performance.
How To Fix a Leaking Tankless Water Heater
Turn off the water, power, or gas, then call Lex Plumbing. Our licensed professionals provide tankless water heater repair services in Carrollton, checking fittings, replacing worn seals, flushing mineral buildup, and repairing or replacing internal components like the heat exchanger.
Who To Call For Leaking Water Heater
For fast, cost-effective leaking water heater repair in Carrollton or Dallas-Fort Worth, call Lex Plumbing at (972) 217-8955. We service gas-powered and electric water heaters and offer complete replacement services when needed. We’ll walk you through how to choose a hot water heater that fits your home’s size, needs, and budget.
More Water Heater Leak FAQs
Why is My Water Heater Hissing and Leaking?
This usually points to pressure buildup or mineral deposits inside the tank. Hissing can also indicate water contacting hot components due to internal leaks.
Will a Leaking Water Heater Explode?
If pressure builds and the relief valve fails, the tank can rupture. Shut off the unit and call a plumber right away.
Is a Leaking Water Heater an Emergency?
Yes. Leaks around electrical components or from the tank should be handled immediately to prevent damage and safety hazards.
If My Water Heater is Leaking, Should I Turn It Off?
Yes. Turn off the water supply and shut off power or gas to the unit. Then contact a licensed plumber.
Why is My Water Heater Leaking from the Drain Valve?
It may be loose or blocked by sediment buildup, preventing a proper seal. Tightening or replacement is usually needed.
Why is My Water Heater Leaking from the Overflow Pipe?
This usually means the temperature and pressure relief valve discharges due to too much pressure or high water temperature.
Why is the Relief Valve On Water Heater Leaking?
The valve may be stuck, worn, or reacting to high pressure or thermal expansion inside the tank.
Why is My New Water Heater Leaking?
Loose pipe connections, installation errors, or faulty parts may be the cause. Contact the installer or a licensed plumber.
Why is My Electric Water Heater Leaking?
Leaks often come from the heating element gasket, tank corrosion, or supply line connections.
Does a Leaking Water Heater Need To Be Replaced?
Only if the tank is leaking. Leaks from valves or fittings can usually be repaired.
Can I Take a Shower if My Water Heater is Leaking?
No. Using a leaking unit increases the risk of further water damage or electrical danger.
Is a Leaking Water Heater Covered By Insurance?
Insurance may cover resulting water damage, but the cost of replacing the water heater is not always covered.
Can a Leaking Water Heater Cause a High Electric Bill?
Yes. Water loss causes the system to work harder, leading to energy waste and higher bills.
Call a Dallas-Fort Worth Water Heater Repair Pro at Lex Plumbing Today!
Don’t wait until you notice water leaking. Pooling water, pipe drips, or uneven hot water can all point to serious problems. The team at Lex Plumbing delivers the best solution and works to prevent leaks in the future. Call (972) 217-8955 now or contact us online for same-day Carrollton and Dallas-Fort Worth plumbing service.
