Water Heater Leak Repair in Lebanon, PA

There are five common leak points on a standard tank water heater, and they don't all mean the same thing.

The inlet and outlet fittings at the top of the tank connect the cold supply and hot delivery lines. These are common leak points, especially on older dielectric nipples or corroded copper connections. They're usually repairable. The drain valve at the bottom of the tank can drip or fail to fully seat, especially after a flush. Replacement is inexpensive. The T&P valve (temperature and pressure relief valve) is a safety device — if it's dripping, it may be doing its job because pressure is high, or it may be failing and need replacement. Either way, a dripping T&P needs attention, not tape. The anode rod port can seep if the rod was removed and not properly reinstalled.

Then there's the tank body itself. If water is seeping through the outer shell or pooling at the base of a unit that has no fitting leaks, the interior steel has corroded through. That tank needs replacement. There is no effective patch for a corroded tank wall.

If you have an active leak that's producing standing water, turn off the cold water supply valve first. It's typically a lever or ball valve on the pipe running into the top of the tank. Turning it perpendicular to the pipe closes it. If you can't find or operate that valve, your home's main shutoff will stop the water.

For a gas unit, turn the gas control knob to "Pilot" or fully to "Off." For an electric unit, go to the breaker panel and switch off the circuit for the water heater before the tank runs dry — an electric heating element left energized with no water in the tank will burn out fast. Then call (201) 277-9344. For a situation that's worsening by the minute, our emergency water heater service page has more guidance.

The temperature and pressure relief valve is there to prevent a catastrophic tank failure. If pressure or temperature inside the tank exceeds safe limits, the T&P valve opens and releases water. That's the system working correctly. But a T&P valve that drips constantly is either responding to real overpressure — often caused by a closed plumbing system without an expansion tank — or it has deteriorated and no longer seats properly.

Either way, taping or capping a dripping T&P valve is dangerous. The fix is diagnosing why it's dripping and correcting the cause, then replacing the valve. If overpressure is the root cause, an expansion tank on your system resolves the pressure spikes. We check both the valve and the system conditions before recommending a fix.

A tank-body leak on a unit that's more than 10 years old almost always points to replacement. The corrosion didn't start at the outside — it worked from the inside out, meaning there's more deterioration inside the tank than you can see. Even if a fitting could be replaced to temporarily slow the drip, the tank wall will fail elsewhere soon.

We give you a straight answer on this. If the unit is worth repairing, we repair it. If the leak source tells us it's past that point, we say so and walk you through the replacement options. Our water heater replacement page covers sizing, fuel-type options, and what a proper install includes.