Water Heater Leaking?
A leaking water heater ranges from a loose fitting you can fix to a corroded tank about to dump 40–50 gallons on the floor. Knowing which — and shutting off the water fast — makes the difference. This page covers where the leak is coming from and what to do right now. Streamlined Plumbing, Fairhope, AL · MP-4462 · (251) 423-7654.
- 01Master Plumber MP-4462
- 02Upfront pricing
- 032-year repair warranty
The short version
First, stop the damage: shut off the cold-water supply valve on top of the heater, and cut its power at the breaker (electric) or turn the gas control to off (gas). Then find the source — a leak at the top fittings or the T&P valve may be repairable, but water pooling at the base of the tank almost always means the tank is corroded through and needs replacing. Call (251) 423-7654; we respond fast because a tank failure floods a room.
What a leaking water heater Actually Means.
Water heaters leak from a few distinct places, and where it's coming from tells you almost everything. Leaks at the top are often the cold/hot water connections or a fitting — frequently repairable. A drip from the temperature-and-pressure (T&P) relief valve can mean the valve is doing its job (excess pressure) or has failed.
Water pooling at the base of the tank is the serious one: it usually means the inner tank has corroded through, and no repair fixes a rusted-out tank — it has to be replaced. Sediment and our mineral-heavy water accelerate that corrosion, especially on heaters past about a decade.
Why You Don't Want to Ignore It.
A water heater holds 40–50 gallons under pressure. A slow leak from a corroded tank is the warning before a full failure that empties all of it onto your floor at once — with the water damage that follows.
Even a small ongoing leak feeds moisture into the surrounding floor and framing, inviting rot and mold in the closet or garage where the heater sits.
A leaking T&P valve can indicate dangerous pressure or temperature buildup in the tank — not something to cap off or ignore, but to diagnose.
What You Can Check Yourself.
- Shut off the cold-water supply valve on top of the heater to stop water feeding the leak. If you can't find or turn it, use the home's main shutoff.
- Cut the energy source: flip the water heater's breaker off for an electric unit, or turn the gas control valve to 'off' for a gas unit. Never leave a leaking electric heater energized.
- Find where the water originates — top fittings, the T&P valve and its discharge tube, or the base of the tank. Photograph it; it helps us arrive with the right plan.
- If water is pooling at the base, don't wait — that's the tank itself. Move anything valuable clear and call.
What to Record About This leaking water heater.
When a water heater leaks, photograph the full unit and then the highest point where water is visible without removing covers. Record whether moisture begins at a top connection, relief-valve tube, drain valve, or the tank base; include the model label, energy type, and approximate installation date if known. State whether the cold supply and power or gas control have been shut off. This information helps distinguish a repairable fitting or valve from a tank-body failure that requires replacement planning.
Keep people away from hot discharge and do not cap a relief pipe. If water is reaching electrical components, the floor is flooding, or the tank is making violent noises, call immediately and follow safe shutoff guidance. Clear a path to the heater and note door widths or stair access; removal logistics matter when a failed tank must leave a closet, attic, or elevated platform.
How Streamlined Plumbing Handles a Water Heater Leaking.
- We confirm the leak's source and give you a straight answer: a repairable fitting or valve, or a tank that's corroded through and needs replacement.
- For repairable leaks, we replace the failed fitting, connection, or T&P valve and pressure-check the unit.
- For a failed tank, we walk you through replacement — including whether a tankless unit makes sense for your home — sized right and installed to code by Master Plumber Brandon Byrd (AL MP-4462).
- Our repair work carries a 2-year warranty, and we handle the old-unit haul-off on replacements.
Preventing a Repeat.
- Flush your tank heater periodically to clear the sediment that accelerates internal corrosion — the leading cause of tank failure in our water.
- Have the anode rod checked; a spent anode lets the tank corrode faster, and replacing it can extend the heater's life.
- Know the age of your heater. Past about a decade, watch for rusty water, popping sounds, and moisture at the base, and plan a replacement before it fails on its own schedule.
Related Streamlined Plumbing services: Water heater services, Tankless water heaters, Emergency plumbing, and the full Baldwin County service area.
Water Heater Leaking — Frequently Asked Questions
My water heater is leaking from the bottom — can it be fixed?
Usually not. Water pooling at the base almost always means the inner tank has corroded through, and a rusted-out tank can't be repaired — it needs replacing. Shut off the water and power to it and call (251) 423-7654 before it fails completely.What do I shut off when my water heater leaks?
Close the cold-water supply valve on top of the heater (or the home's main shutoff), then cut the energy: the breaker for an electric unit, or the gas control valve for a gas unit. That stops the leak from feeding and makes the unit safe until we arrive.Water is dripping from the valve with a tube on the side — is that bad?
That's the temperature-and-pressure (T&P) relief valve. It can drip because it's relieving excess pressure — which itself needs diagnosing — or because the valve has failed. Either way it shouldn't be capped or ignored; call and we'll determine which it is.