3 Reasons Why Your Water Heater Is Leaking

February 5, 2026

Discovering a water heater leak can be stressful, not only because of potential water damage but also because water heating accounts for about 20% of your home's energy use, according to the Department of Energy. Knowing the common causes of leaks can help you address problems efficiently and protect both your home and energy costs. Understanding the underlying issues can make water heater repairs faster and less disruptive. Here are three key reasons your water heater may be leaking and steps to take with each situation.


1. Corrosion

Corrosion is one of the leading causes of water heater leaks. Over time, metal components inside your tank can rust, causing tiny holes where water escapes. Signs of corrosion include rust-colored water or a metallic taste. Addressing corrosion early is essential to prevent more extensive damage to your water heater and surrounding areas. Regular inspections of hot water heaters, especially at joints and seams, can help catch corrosion before it becomes a serious issue. Replacing a corroded tank in time can also extend the overall lifespan of your system.


2. Loose Drain Valve

A loose drain valve at the bottom of your water heater can allow water to escape, creating puddles on the floor. This valve is designed for draining and maintenance, but if it loosens or becomes worn, leaks are likely. Checking the drain valve periodically and tightening it or replacing it if necessary can prevent water damage. For water heater repairs, this is often one of the simplest problems to fix quickly. Ensuring the valve is secure also helps maintain the tank’s efficiency and safety.


3. High Pressure Settings

Excessive pressure inside your water heater tank can also lead to leaks. High water temperatures increase pressure, which may cause water to escape through the pressure relief valve — a safety feature designed to prevent tank explosions. Ensuring your thermostat is set to a safe temperature and scheduling routine maintenance can help manage pressure and prevent leaks before they worsen. Regularly monitoring both temperature and pressure improves the efficiency and safety of your hot water system.


Recognizing why your water heater is leaking can save both time and energy costs while keeping your home safe. Whether corrosion, a loose drain valve, or high pressure is causing the problem, timely inspections and professional water heater repairs are essential. For reliable service and support, we recommend contacting D.E. Wildasin & Son LLC, where we provide comprehensive solutions for hot water heaters, plumbing systems, and related services to keep your home running smoothly.

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