hot water tank dripping

Hot Water Tank Dripping? Here’s What It Means and How to Fix It

A dripping hot water tank can feel like a small issue — until it turns into a big mess. Whether it’s a steady drip or a small puddle forming under your tank, it’s often a warning sign that something’s going wrong inside your system.

Here in Calgary, we see it all the time. The good news is, if you catch it early and understand the cause, you can often avoid serious damage and costly repairs.

Why Is Your Hot Water Tank Dripping?

If your hot water tank is dripping, it’s usually a sign of internal damage caused by years of wear and tear. In Calgary, the water is naturally high in minerals like calcium and magnesium. Over time, this “hard water” slowly breaks down the glass lining inside your tank, leading to corrosion and leaks.

Many homeowners don’t realize that water heaters need maintenance, just like any other appliance. Without regular care, mineral buildup takes over, and the tank starts to rust from the inside out.

In some cases, physical damage is also a factor — like dents or cracks from nearby storage items, or rust caused by chemical cleaners sitting too close to the tank.

Pro Tip: Not all drips mean the same thing. A leak from the bottom of the tank is serious, while a drip from a valve or pipe might be easier to fix.

Common Causes of a Dripping Hot Water Tank

Worn-Out Anode Rod: This “sacrificial” rod protects your tank by attracting corrosive minerals. If it’s never replaced, your tank becomes the next target — and leaks follow.

Corroded Pipes or Fittings: Especially if your tank sits in a basement near cleaning products, spilled chemicals can speed up corrosion at joints and valves.

Dissimilar Metals Connected Together: One of the biggest mistakes we see is when copper fittings are attached directly to stainless steel nipples. This causes galvanic corrosion — which starts at the joint and works its way inside the tank.

Old Age: Most tanks last 10–12 years. If your tank is older than that and hasn’t had regular maintenance, it’s likely on borrowed time.

DIY Troubleshooting Steps Before Calling a Plumber
If you notice your tank dripping, here’s what to do first:

  1. Turn off the main water supply to the tank to stop further leaking.
  2. Shut off the power source — either the breaker for electric tanks or the gas valve for gas tanks.
  3. Inspect where the water is coming from:
    • Bottom of the tank (likely internal failure)
    • Relief valve on the side (could be a pressure or temperature issue)
    • Fittings or pipes (might be corrosion or loose joints)
  4. Check for corrosion or buildup around connections.
  5. Read the instructions on your tank if visible — many have shutoff or safety info printed right on them.
  6. Avoid touching the tank if it’s still connected to electricity. Water and power are a dangerous mix — safety comes first.

⚠️ Important: Never touch the tank or try to open any part if it’s still plugged into electricity.

If you’ve taken these steps, you’re now in a good position to call a plumber and explain exactly what’s going on.

When Should You Call a Professional Plumber?

Call a licensed plumber if:

  • You see water leaking from the bottom of the tank — this usually means a full replacement is needed.
  • There’s a visible leak at any pipe, valve, or joint.
  • You’re dealing with electric or gas systems and aren’t comfortable going any further.
  • Your tank is still under warranty — WiseTech Plumbing can help you file the claim and handle the replacement from start to finish.

And remember: WiseTech Plumbing offers same-day service across Calgary, so you don’t have to wait while your basement floods or your hot water disappears.

How to Prevent Hot Water Tank Leaks in the Future

Prevention is always cheaper than emergency repairs. Here’s how to keep your tank in top shape:

  • Flush your tank twice a year to remove mineral buildup.
  • Install a sediment filter and water softener — these help reduce damage from Calgary’s hard water.
  • Inspect pipes and fittings regularly for rust or corrosion.
  • Don’t store chemicals near the tank — especially in utility rooms or basements.
  • Make sure electric tanks are properly grounded to prevent hidden electrical corrosion.
  • Avoid placing tanks directly on concrete — use a stand to prevent rust from underneath.
  • Visit your mechanical room once a week for a quick visual check. Catching small leaks early can save you thousands.

Conclusion

Most hot water tank leaks start small — but they’re rarely random. Hard water, poor maintenance, and neglect are usually the real culprits.

By flushing your tank regularly, keeping an eye on fittings, and installing a good water softener, you can avoid most common problems and extend the life of your system.

And if you ever notice a drip — even a small one — don’t ignore it. Call a professional right away.

WiseTech Plumbing is here to help, with same-day service and expert advice you can trust.

If you’re experiencing issues like a leaking hot water tank and searching for a plumber near me, Wise Tech Plumbing offers reliable and affordable plumbing solutions right in your area.