Top connections
Loose or corroded water connectors and fittings. Often repairable. A water heater leaking from top is usually here.
Emergency water heater help
Leaking Water Heater San Antonio
Water pooling around your water heater? An experienced local plumber can find the leak and repair or replace the unit quickly.
Call (726) 268-4856- Leaks from top or bottom
- Repairs and replacements
- No obligation to hire
Last updated November 8, 2026
Act now
Hot Water Leaking? What to Do in the First 10 Minutes
At a glance
- Shut off the power or gas, then close the cold-water supply valve.
- Never touch an electric water heater standing in water before the breaker is off.
- A leak from the tank body means replacement; a leak from a valve or pipe can often be repaired.
- Call (726) 268-4856 to be connected with a local plumber.
If your water heater is leaking, follow these steps in order. Water heater leaking near electrical parts is a shock risk, so power comes first.
- Cut the power or gas. Electric: switch off the water heater breaker. Gas: turn the control knob to OFF or PILOT.
- Close the cold-water valve on the pipe entering the top of the tank. If it will not turn, close the main shutoff at the street or house.
- Relieve pressure. Open a hot tap in a sink or tub.
- Drain if needed. If water is reaching floors or walls, attach a garden hose to the drain valve and run it outside or to a floor drain.
- Move belongings and lay towels to protect floors.
- Call for help. We connect you with an independent local plumber who handles leaking water heaters.
Find the source
Water Heater Leaking From Bottom
A water heater leaking from bottom usually means one of three things: the drain valve is dripping, the relief valve's discharge line is running down the side, or the tank has rusted through.
A drain valve leak can be stopped with a cap or a new valve. Water from the relief valve line means the valve is releasing pressure, which points to high pressure, high temperature or a missing expansion tank. Water seeping from under the jacket with no other source usually means the tank has failed and needs replacement.
Other sources
Water Leaking From Water Heater Pipes, Valves or Tank
Water leaking from a water heater can start above the tank and run down, so check from the top.
Relief valve
Dripping or discharging means pressure or temperature is too high, or the valve has failed. Do not cap it.
Drain valve
A slow drip at the bottom spigot. Usually repairable.
Condensation
Gas units can form condensation on a cold tank, especially after a big draw. It should stop as the tank heats.
Tank body
Rust or seepage from the tank itself. Not repairable; the unit needs replacement.
Water heater leaking right now? Call a local plumber.
Call (726) 268-4856Replacement
Emergency Hot Water Tank Replacement
Emergency hot water tank replacement is needed when the tank body has failed. Many plumbers stock common 40 and 50 gallon gas and electric tanks for same-visit swaps, but availability depends on the contractor. See San Antonio water heater replacement for what a complete replacement includes.
San Antonio homes
Attic Water Heater Leaks
Many San Antonio homes have water heaters in the attic. A leak there can bring down a ceiling, so attic units need a drain pan with a drain line, and a leak detector or automatic shutoff valve is worth adding.
If an attic unit leaks, shut off the water and power or gas right away, then check the ceiling below for sagging before walking under it.
Homeowner questions
Leaking Water Heater FAQs
Is a leaking water heater dangerous?
It can be. Water near an electric unit is a shock risk, and a relief valve discharging means pressure or temperature is too high. Shut off power or gas and water, and call a plumber.
Can I still use hot water if my water heater is leaking?
Not safely if the tank itself is leaking. With the cold supply off, the tank will not refill. A small drain valve drip may allow limited use until repair, but a plumber should check it.
Why is my relief valve leaking?
High water pressure, a temperature set too high, thermal expansion in a closed system without an expansion tank, or a worn valve. Never cap or plug the relief valve.
Does homeowners insurance cover a leaking water heater?
Policies often cover sudden water damage but not the water heater itself or gradual leaks. Check your policy and document the damage with photos.
Do you send a plumber?
We are a free referral service. We connect you with an independent local plumber who can respond to leaks in your area.
Get Help With a Leaking Water Heater
Tell us where the water is coming from. We will connect you with an independent local plumber who can repair or replace the unit. No obligation to hire.