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How to fix a rain barrel leak

We'll locate the leak, replace the spigot seal or tighten fittings, and patch or replace the barrel.

How-to · Home plumbing
15–30 min
What you'll need
  • Replacement O-ring or washer (for spigot)
  • Thread sealant (Teflon tape or pipe dope)
  • Plastic repair kit or epoxy (if patching)

At a glance

  • Locate the leak—spigot, overflow, lid, or barrel body.
  • Replace the spigot O-ring or washer if the leak is at the spigot.
  • Tighten the spigot or overflow fitting; use thread sealant if needed.
  • Patch small holes in the barrel with a plastic repair kit or epoxy.
  • Replace the barrel if it is badly cracked or has multiple leaks.
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Steps

Goal: Locate the leak, fix the spigot or fittings, and patch or replace the barrel.

  • Empty the barrel and locate the leak—spigot, overflow, lid, or barrel body.
  • Good: You see the leak location. Proceed to Replace spigot seal or Patch barrel.
  • Bad: Cannot locate—check all fittings and the barrel body.

Replace spigot seal

Goal: Fix a leak at the spigot.

  • Remove the spigot. Replace the O-ring or washer. Reinstall with thread sealant.
  • Good: No drip when the spigot is closed.
  • Bad: Barrel is cracked—patch or replace.

Patch barrel

Goal: Fix a hole or crack in the barrel.

  • Clean and dry the area. Apply a plastic repair kit or waterproof epoxy per the product instructions.
  • Good: No leak when the barrel is full.
  • Bad: Multiple holes or badly cracked—replace the barrel.

When to get help

Call a plumber if:

  • The barrel is plumbed to the downspout and the connection leaks.
  • You need help with a complex setup.

Rain barrels rarely need a plumber—most leaks are DIY-fixable.

Verification

  • No drip at the spigot when closed.
  • No leak at the overflow or lid when the barrel is full.
  • No water escaping from the barrel body.

Reviewed by Blackbox Atlas

Frequently asked questions

Why does my rain barrel leak?
Common causes: a worn spigot O-ring or washer, a loose spigot or overflow fitting, a cracked lid seal, or a hole or crack in the barrel. Plastic barrels can crack from freezing or UV exposure.
Can I fix a rain barrel leak myself?
Yes. You can replace the spigot O-ring, tighten fittings, and patch small holes. A badly cracked barrel may need replacement.
When should I call a plumber for a rain barrel leak?
Rain barrels rarely need a plumber. Replace the barrel if it is badly cracked or has multiple leaks. If the barrel is plumbed to the downspout and the connection leaks, you may need help.

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