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Why Does Lightning Sometimes Travel Through Plumbing?

Last updated October 26, 2026

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The short answer

How Lightning Finds Plumbing

Lightning is a massive electrical discharge that looks for the most conductive route to the earth. Your home's plumbing system, with its metal pipes, provides a natural pathway. Copper and galvanized steel pipes are especially good at carrying electricity, so a strike near your house can send a surge through them.

The surge follows the water, too. Water contains minerals that conduct electricity, so any tap, shower, or toilet can become energized during a strike. This is why you might hear of lightning damaging sinks or causing shocks in bathrooms. The path is not always predictable, but metal and water are the key ingredients.

  • Metal pipes conduct electricity well
  • Water's minerals help carry the surge
  • Strikes can hit nearby ground or structures
  • Plumbing connects throughout the entire home
  • Even plastic pipes can have metal fittings

What Damage Lightning Can Do

When lightning surges through plumbing, it can cause significant damage. The intense heat and electrical force can crack pipes, melt solder joints, or blow apart fixtures. You might notice leaks, water damage, or even burst pipes after a storm, which can lead to costly repairs.

The surge can also damage appliances connected to your water supply, like washing machines, dishwashers, and water heaters. Electronics near plumbing, such as a smart toilet or a tankless water heater, are at risk too. If you see water damage after a storm, act quickly to prevent mold and structural issues.

  • Cracked or burst pipes
  • Melted solder joints
  • Damaged appliances and electronics
  • Leaks that cause water damage
  • Potential for mold growth

Safety Steps During a Storm

Your safety matters most during a lightning storm. Avoid using water, including showers, baths, sinks, and washing machines, until the storm passes. The risk of electric shock is real, even indoors. Stay away from plumbing fixtures and metal pipes that might conduct a surge.

Unplug appliances that use water, like washing machines and dishwashers, to reduce the chance of damage. If you feel unwell after a strike, see a doctor. Also, have a plumber check your pipes for damage after a severe storm, especially if you notice any leaks or strange noises.

  • Avoid all water use during storms
  • Stay away from sinks, showers, and tubs
  • Unplug water-using appliances
  • Check for leaks after a storm
  • See a doctor if you feel unwell

When Lightning Causes Water Damage

If lightning damages your plumbing, you may face water damage from leaks or bursts. Water can soak into drywall, flooring, and ceilings, leading to stains, warping, and mold. The longer water sits, the worse the damage becomes, so address it quickly.

Inspect the affected areas for signs of water damage, such as discoloration, soft spots, or a musty smell. If you find damage, you might need to remove wet flooring or repair drywall. Local water damage pros can help with cleanup and restoration, but you can start by drying the area and checking your insurance policy. Policies vary, and your insurer decides what is covered.

  • Check ceilings and walls for stains
  • Feel for soft or sagging drywall
  • Look for warped or buckled flooring
  • Listen for dripping or running water
  • Use fans and dehumidifiers to dry wet areas

Preventing Plumbing Lightning Damage

You can reduce the risk of lightning damage to your plumbing. Install a whole-home surge protector to guard your electrical system, which can also help with plumbing-connected appliances. Grounding your plumbing system properly is another step, though you should have an electrician handle that work.

Consider replacing old metal pipes with modern plastic ones, like PEX, which are less conductive. However, metal fittings and fixtures still exist, so no system is fully immune. If you live in Virginia Beach, keep your shutoff valve location written down so you can stop water flow quickly after a storm. Policies vary, and your insurer decides what is covered.

  • Install a whole-home surge protector
  • Have an electrician check grounding
  • Consider PEX pipes for new plumbing
  • Know your main water shutoff location
  • Inspect plumbing after major storms

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Frequently asked questions

Can lightning travel through plastic pipes?

Plastic pipes are not good conductors, but lightning can still jump through water inside them. Water contains minerals that carry electricity, and metal fittings or valves can provide a path. So even with plastic pipes, avoid using water during a storm.

What should I do if lightning hits my house?

First, check for any immediate dangers like fire or gas leaks. Then, inspect your plumbing for leaks or damage. If you find water damage, turn off your water supply and call a plumber. Also, contact your insurance company to report potential damage.

Does lightning damage plumbing often?

It is not common, but it can happen, especially in areas with frequent thunderstorms. The risk increases if your home has metal pipes or is in an open area. Even rare events can cause significant damage, so taking precautions is wise.

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