Water Heater Repair
Track down the cause of cold showers, tank leaks, popping noises, pilot trouble or burned-out elements.
Homeowner tips
Water Heater Leaking From the Bottom? What to Do in Westminster
Close the heater's cold inlet and turn off its power or gas, then trace where the water is coming from. A tank that leaks from its shell must be replaced.
By the Westminster Plumbing Co. team ·
Shut things off first
Close the cold water valve above the heater. Switch off the breaker for an electric unit, or turn the gas control to pilot or off for a gas unit. If the water is spreading, close the main valve.
Do not touch wet electrical parts. If the floor is soaked around an electric heater, turn off power at the panel from a dry spot.
Find where the water starts
Dry the base and the pipes, then look for the first drip. A leak from a pipe fitting, the drain valve or the relief valve is usually repairable. Water seeping from the bottom seam of the tank, or from beneath the insulation, means the tank has failed.
A puddle that appears after a long run may be condensation, especially on a gas heater with a cold incoming line. Wipe it and watch for a real drip.
Why tanks fail
Inside every tank is steel that rusts without protection. A sacrificial anode rod draws the corrosion to itself. Once it is used up, the tank wall begins to rust through. Sediment on the bottom also bakes against the steel and shortens life.
Westminster's report puts hardness around 7 to 8 grains per gallon, so scale and sediment collect over time. A yearly flush helps.
Where the water comes from
Find the first drip and match it to the table.
| Where it leaks | What it means | Likely fix |
|---|---|---|
| Pipe connection on top | Loose or worn fitting | Tighten or replace the fitting |
| Relief valve or its pipe | High pressure or a worn valve | Check pressure, add an expansion tank, replace the valve |
| Drain valve at the bottom | A worn or loose valve | Replace the valve |
| Bottom seam or under the jacket | A failed tank | Replace the water heater |
Relief valve drips
The temperature and pressure relief valve opens when pressure or temperature rises too high. A steady drip may mean high water pressure or a closed system without an expansion tank. A valve that leaks after it has discharged may need replacing.
Never cap the discharge pipe. Have a plumber check the pressure and add an expansion tank if needed.
Repair or replace
A loose fitting or a failed drain valve is a small repair. A leaking tank cannot be patched. If the unit is more than about a dozen years old, replacement is usually the sensible choice even for a repairable leak.
Ask the contractor about size, fuel and venting. Westminster lists water heater replacement among work that needs a permit.
Protect the house while you wait
Put a pan or towels under the unit and a bucket under the drain. If the heater sits in a finished basement, check the floor and walls for dampness over the next day.
If water reached carpet or drywall, dry it quickly. A restoration crew can use meters to check hidden moisture.
Signs that the tank itself has failed
Rust-colored water at the tap, moisture along the lower seam and a puddle that returns after you wipe it away all point toward the tank. Once water seeps through the steel shell, no patch or sealant can fix it, and the leak will only grow.
Listen for rumbling or popping too. Sediment baked onto the bottom of the tank traps water that flashes to steam, and the repeated stress can open a pinhole. A tank in this condition is near the end of its life even if it still makes hot water.
Planning the replacement calmly
If the tank must go, decide on size and fuel before the crew arrives. Matching the old unit is the simplest path, while switching fuel or moving to a tankless model can need new venting, a new gas line or a larger electrical circuit.
Clear a path to the heater and move stored items away. Ask the contractor whether the quote includes a new pan, an expansion tank, fresh shutoff valves and hauling away the old unit. Those small items affect both safety and the final bill.
Costs and timing to expect
A leak from a loose fitting or a worn drain valve is a small repair that often finishes in one visit. A leak from the tank means replacement, and the crew usually needs a few hours to drain, remove, install and test the new unit.
Gas models need a gas-tight connection and proper venting, and electric models need a safe circuit. Permits and inspections may apply, so ask who handles them and how long the process takes before the work begins.
Get the scope in writing before work begins. A written scope lists the heater model, the parts being replaced, the haul-away and any warranty terms, which prevents surprises on the final invoice.
Preventing the next leak
Once the new heater is in, install a drain pan with a pipe to a floor drain if there is room. A pan will not stop a leak, but it channels the water away from the floor and gives you time to react.
Flush the tank every year, check the relief valve and test it with the handle gently. A heater that is maintained can last well beyond its warranty, while a neglected one tends to fail early.
What to tell the dispatcher
Say whether the heater is gas or electric, how large the leak is and where the water seems to start. Mention the age of the unit if you know it, and whether you have shut off the supply.
Common questions
Answers about leaking water heater
Not safely. Shut off the supply and power or gas. A leak can get worse without warning.
Many tanks have a limited warranty on the shell, usually shorter than the sales brochure suggests. Check the label and the paperwork.
A failed tank can release all its contents, often forty to fifty gallons, plus whatever flows in from the supply. Shut off the supply to limit it.
Westminster lists water heater installation and replacement among work that needs a permit. Your contractor should handle it.
Related services
Water Heater Installation & Replacement
Swap a dead tank for a new one and choose capacity, fuel type, venting and placement.
Water Damage Restoration
Dry and rebuild a home after a pipe leak, a frozen-pipe burst or a sewer backup.
Keep reading
How to flush a water heater
A yearly flush removes sediment, quiets the tank and helps it last longer, especially in moderately hard water.
Shutting off the main water valve
Know where the main valve is before you need it. This guide covers where to look, how to turn it and what to do if it sticks.
Water hammer: why pipes bang
Banging pipes when a valve closes have a simple physical cause and a few common fixes.
Heater leaking now?
Shut off the supply valve and power or gas, then call. Say whether it is gas or electric and where the water is.