Walking into your basement and discovering a puddle of water around your water heater can cause you to experience instant anxiety. You might immediately start wondering what’s wrong with my water heater, do I need a new heater, do I need to hire a plumber, or can I fix this on my own?
At Baethke Plumbing, we want to use our extensive water heater knowledge to help answer these questions. With 33 years of water heater service calls under our belt, we have the confidence to help you effectively troubleshoot this issue. We believe you should know exactly what to do to protect your personal property and your wallet before you spend money before calling one of our technicians.
In some cases, a leaking water heater does not mean you need to buy a replacement unit. We will go over a few reasons for the leak, and some steps you can perform to stop the damage, figure out where the water is coming from, and determine if you actually need a professional plumber.
My Water Heater Is Leaking: A Troubleshooting Guide
By following the steps below you will be able to limit the damage in your home and help your plumbing technician solve the problem much quicker. We only recommend performing the steps below if you feel comfortable doing this type of troubleshooting. If you do not feel comfortable with any of the steps, please contact a professional plumbing contractor.
Step 1: Shut Off the Water Supply
You need to stop new water from entering the system. This will prevent the room or floor from additional flooding. Look at the top of your water heater. You will see two pipes going into the tank. One is for cold water coming in, and one is for hot water going out. The cold-water line will have a shutoff valve.
If the top valve is stuck, rusted, or leaking itself, do not panic. Go to your home’s main water shutoff valve (usually near your water meter where the main line enters the house) and turn off the water to the entire property.
Step 2: Turn Off the Power and Fuel
Before you touch any valves or look closely at the leak, you must make the area safe. Try to remove as much excess water as possible.
- For Electric Water Heaters
Go directly to your home’s main electrical breaker panel. Find the circuit breaker labeled “Water Heater” (usually a double-pole 30-amp breaker) and flip it completely to the OFF position. Heating elements inside a dry or leaking tank can burn out fast if the power stays on, creating an electrical hazard.
- For Gas Water Heaters
Look at the bottom of your water heater. You will see a gas line leading into a control box. Find the dial on the box and turn it to the OFF or PILOT position. If you smell gas (a rotten egg odor), do not touch any switches. Leave your home immediately and call emergency services.
Step 3: Investigate the Leak (Where Is it Coming From?)
Now that the water and power are off, grab a flashlight and look closely at the unit. Water always flows down, so a puddle on the floor often starts much higher up on the machine. Identifying the source helps you know if you face a minor repair or a complete replacement.
Step 4: Possible Sources for Your Water Heater Leak
There are typically four common areas the leak could be originating from, your water line connections, the temperature release value, the drain valve, and the actual water tank itself. However, the most common sources of a leak from your water heater are the connecting pipes or the tank.
- The Top Connections (No Replacement Required)
Look at the cold and hot water pipes entering the top of the tank. Look for dripping water around the threaded fittings or flexible connectors. If you see water pooling on top of the tank, the issue is likely just a loose fitting or a worn-out rubber washer. Tighten the fitting or replace washer to fix this kind of leak.
- The Temperature and Pressure Valve (No Replacement Required)
This is a safety valve located on the top or side of the tank. It features a small metal lever and connects to a pipe running straight down toward the floor. If water is dripping from this pipe, the valve is doing its job by releasing excess pressure or heat.
However, it can also leak if the valve itself fails or if your home’s water pressure is too high. If water shoots out from this valve it is usually a sign of a bigger issue, and it is recommended to have a technician run a diagnostic on your system.
- The Drain Valve (No Replacement Required)
Near the very bottom of the tank, you will find a small plastic or brass valve that looks like a garden hose spigot. If water is dripping from the nozzle or around the threads, the valve seal has failed. This can often be capped or replaced easily.
- The Internal Tank (Requires Replacement)
If the top connections and valves are completely dry, but water is slowly weeping out from underneath the metal outer jacket of the heater, the internal steel tank has cracked. Over time, sediment buildup cooks the bottom of the tank, causing micro-fractures. If the internal tank is cracked, it cannot be repaired. The entire unit must be replaced.
Step 4: Document the Details
Before you call us, gather the facts. This information is valuable to the process and it will help our customer service representative give you an accurate initial assessment and send a technician with the right parts.
Write down or take pictures of:
- The Manufacturer Label: Look for the brand name (such as Rheem, Bradford White, or A.O. Smith).
- Model and Serial Numbers: These numbers tell the plumber the exact size, fuel type, and age of your unit.
- The Source of the Leak: Tell them exactly what you found during your investigation in Step 3.
With the water damage contained, your DIY inspection done, and information documented, we can now begin the process of fixing the leak coming from your water heater with full and open transparency.
Taking the Next Steps to Fix Your Leaking Water Heater
Remember when dealing with a leaking water heater, you should first shut off the water supply and secure the power or fuel, then inspect the unit to identify the source of the leak before documenting details for a plumber. This will make sure once we arrive on the scene, we will have all the information we need to solve the problem faster. And you will also have a safe and secure home.
By helping you protect your home from further damage and assessing the leak, we aim to earn your trust from the start. If the problem is simply a loose fitting at the top of the tank, we’ll tell you. If the tank is cracked and needs replacement, we’ll show you the evidence so you can make an informed decision.
Please give us a call and let us know your situation so we can help you determine the quickest, most cost-effective water heater fix for your home.
Frequently Asked Questions
Why is water pooling at the bottom of the heater?
- A leaky or loose drain valve near the base often causes pooling.
- Excess sediment buildup can also overheat the bottom and cause small cracks.
Why is the pressure relief valve leaking?
- The Temperature and Pressure (T&P) relief valve opens when internal tank pressure or water temperature gets too high.
- A faulty or worn-out valve may need a simple replacement.
Can high water pressure cause a leak?
- Yes, excessive pressure puts extra stress on the tank walls and connection points. Installing a pressure-reducing valve fixes this issue.
