Why Is My Hot Water Heater Leaking?

(And What You Should Do About It Right Now)

Few household problems are as stressful—or potentially damaging—as discovering water around your hot water heater. Whether it’s a small puddle or a steady drip, a leak is never something to ignore. Left unchecked, it can cause water damage, raise utility bills, and even lead to complete system failure.

This guide will help you:

• Understand the most common causes of a hot water heater leak

• Spot the warning signs before damage gets worse

• Take immediate action to protect your home

• Decide whether a repair or replacement is the right move

• Learn how to prevent future leaks with expert maintenance tips

At Newwrx Plumbing, we’ve helped countless Anchorage-area homeowners troubleshoot and fix water heater problems fast. We know how important it is to act quickly—and we’ll walk you through exactly what to do.

Common Causes of a Hot Water Heater Leak

While water heaters are built to last, no appliance runs forever without attention. Understanding where a leak might be coming from is the first step toward fixing it.

1. Leaking from the Top

If you see water pooling on top of your water heater or dripping down the sides, it’s often caused by:

• Loose or corroded inlet/outlet connections – These are the pipes that carry cold water in and hot water out. Over time, vibration, expansion, and corrosion can loosen fittings or eat away at the metal.

• Faulty temperature and pressure (T&P) relief valve – This valve is a safety device designed to release pressure if it builds up too high. If it malfunctions or detects excessive pressure, it may leak from the top.

💡 DIY Tip: If you’re comfortable with tools, check for loose fittings, but don’t over-tighten—they can crack or warp. If your T&P valve is leaking regularly, it’s a sign it needs replacement.

2. Leaking from the Bottom

Water pooling at the base can be caused by:

• Sediment buildup and corrosion inside the tank – Minerals from your water settle over time, weakening the tank lining and causing rust spots that eventually leak.

• Leaky drain valve – Located near the bottom of the tank, this valve is used for maintenance and flushing. Over time, it can become loose, clogged, or fail completely.

⚠️ Bad News Alert: If the leak is coming directly from the tank, it’s not repairable—the safest option is replacing the water heater.

3. Condensation or Overflow

Not all moisture means there’s a problem. Sometimes, what looks like a leak is actually:

• Condensation – Common in humid environments or when the tank is working extra hard, especially in winter.

• Overflow from high pressure – If your system is running too hot or under too much pressure, water can escape from the overflow pipe.

🔍 Pro Tip: If you’re unsure whether it’s a leak or condensation, place a dry paper towel at the suspected spot and check after an hour. Or better yet—call Newwrx Plumbing for a quick inspection before water damage occurs.

Signs Your Water Heater Is Leaking (Even If You Can’t See It)

Some leaks are obvious, but others hide in plain sight. Watch for these red flags:

1. Water Around the Base – Even small puddles or damp spots around the heater are a warning sign.

2. Rusty or Discolored Hot Water – Reddish-brown water can indicate internal corrosion.

3. Unusual Sounds – Popping or rumbling often means sediment buildup, which can weaken the tank.

4. Reduced Hot Water Supply – If you run out of hot water faster than usual, a leak could be affecting pressure or heating.

5. Musty Odors or Mold Growth – Hidden leaks can lead to mold in surrounding walls, floors, or insulation.

What To Do Immediately If You Spot a Leak

When it comes to leaks, every minute counts. Here’s what to do the moment you suspect a problem:

1. Turn Off the Power Supply

For safety, always disconnect power before inspecting or working on your heater.

• Electric heaters: Find and flip the circuit breaker marked “Water Heater” to OFF.

• Gas heaters: Turn the gas control knob to OFF. If you smell gas, evacuate immediately and call your gas company.

2. Shut Off the Water Supply

Prevent more water from leaking by closing the shut-off valve at the top of the unit (turn clockwise).

• If you can’t reach it safely or it’s stuck, shut off your home’s main water supply instead.

3. Remove Standing Water

Mop up puddles or use a wet/dry vacuum to prevent floor, baseboard, or wall damage.

4. Inspect the Source (If Safe)

Check:

• Top and bottom of the tank

• T&P valve

• Drain valve

• Inlet/outlet connections

• Tank seams

📸 Tip: Take photos for your plumber and insurance records.

5. Call a Licensed Plumber

Even a small leak can hide a bigger issue. At Newwrx Plumbing, we’ll:

• Identify the exact source of the leak

• Recommend the right repair or replacement

• Ensure your system is safe, efficient, and up to code

Can I Fix a Leaking Water Heater Myself?

Sometimes. If you’re handy and the issue is minor, you might be able to:

• Tighten loose pipe fittings

• Replace a worn washer or drain valve cap

• Identify harmless condensation

✅ Always turn off power and water before working on your heater.

Call a Professional If:

• The tank is corroded or cracked

• The T&P valve is leaking

• There’s visible water damage nearby

• You’re not sure where the leak is coming from

Why Let Newwrx Plumbing Handle It?

Our licensed team provides:

• Accurate diagnosis so you don’t waste time or money on guesswork

• Safe, efficient work that protects your home and family

• Transparent pricing without pushy upsells

• Long-term solutions that reduce the risk of repeat leaks

📞 When in doubt, call us. We’re here for emergency service and scheduled repairs.

Preventing Future Water Heater Leaks

The best way to avoid a costly leak is to stay ahead of problems with maintenance:

1. Schedule Annual Maintenance

A professional inspection checks for:

• Loose fittings

• Sediment buildup

• Corrosion

• Valve function and pressure balance

2. Flush the Tank Yearly

Draining and flushing removes mineral deposits, preventing efficiency loss and corrosion.

3. Test the T&P Valve Annually

Lift the valve’s lever to ensure it releases water—replace it if it doesn’t.

4. Inspect for Leaks Monthly

Look for rust, drips, or moisture around the base and fittings.

5. Install a Leak Detection System

Smart leak detectors alert you via phone and some can shut off the water supply automatically.

Stay Ahead of Leaks with Help from Newwrx Plumbing

We help Anchorage homeowners protect their investment with:

• Preventive maintenance plans

• Expert advice on extending water heater life

• Fast repairs when issues arise

📅 Ready for your annual check-up? Book online or call us today.

Don’t Let a Leak Become a Bigger Problem

At Newwrx Plumbing, we specialize in:

• Quick, accurate leak detection

• Upfront, honest pricing

• High-quality repairs or efficient replacements

• Keeping your home safe, dry, and comfortable

⏱️ Don’t wait—even a small drip can turn into a disaster.
👉 Call now for inspections, repairs, or emergency service.

Contact Information:

Newwrx Plumbing

7031 Roseville Road Suite A
Sacramento, CA 95842
United States

Adam Lorton
(916) 713-1010
https://newwrxplumbing.com