Water Heater Leak: Quick Fixes and When to Call a Pro

Noticing water pooling around your water heater is a headache you don’t need. A leak can waste water, damage floors, and leave you with cold showers. The good news? Many leaks have easy fixes you can try before hunting down a technician.

Common Causes of a Leak

First, figure out where the water is coming from. The most typical spots are the pressure‑relief valve, the temperature‑and‑pressure (T&P) valve, the drain valve, and the tank itself. A loose connection or a worn‑out seal can let water escape, while corrosion can punch holes straight through the metal. In older units, the inner lining may deteriorate, causing a slow drip that looks harmless at first but gets worse over time.

Steps to Stop the Leak

1. Turn off the power. If you have an electric heater, flip the breaker. For gas models, locate the gas shut‑off valve and turn it off.

2. Shut off the water supply. The valve is usually a straight‑handle shut‑off located on the cold‑water line feeding the tank. Turn it clockwise until it stops.

3. Drain the tank. Connect a garden hose to the drain valve at the bottom of the heater and run it to a floor drain or outside. Open the drain valve and let the water flow out. This reduces pressure and lets you work safely.

4. Inspect and tighten connections. Look at the inlet and outlet fittings. If they’re loose, gently tighten them with a wrench—don’t over‑tighten or you could crack the pipe.

5. Replace worn parts. Small components like the T&P valve or the drain plug are inexpensive and easy to swap. Turn the valve clockwise to remove it, replace the rubber washer, and reinstall.

If the tank itself is leaking, you’ve likely hit the end of its life. A rust‑filled tank can’t be patched; replacement is the only safe option.

After you’ve fixed the obvious issues, turn the water back on, watch for any fresh drips, and then restore power or gas. If water still seeps out, it’s time to call a professional. A qualified technician can test for hidden cracks, pressure problems, and ensure the system is up to code.

Why bother with a pro? Leaks that come from the tank, the internal heating element, or corroded pipes need specialized tools and knowledge. Attempting a DIY repair on these parts can damage the heater further or create a safety hazard, especially with gas models.

In short, a water heater leak isn’t always a disaster. Check the valves, tighten connections, and replace cheap parts first. When the tank itself is the culprit, or if you’re not comfortable working with gas, call a reputable repair service. Acting fast saves water, protects your home, and gets your hot showers back on track sooner.

Remember, regular maintenance—like flushing the tank once a year—can keep corrosion at bay and extend the life of your heater. A quick check every six months isn’t a chore; it’s a small effort that prevents big headaches down the road.