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How to fix a fountain leak

We'll help you locate the leak and fix tubing, O-rings, or basin cracks—or replace the pump.

How-to · Home plumbing
20–40 min
What you'll need
  • Replacement tubing (same diameter)
  • Replacement O-ring or gasket (for pump)
  • Waterproof sealant (for basin cracks)
  • Hose clamps (optional)

At a glance

  • Unplug the fountain and empty it before working on it.
  • Check the pump housing, tubing connections, and basin for cracks or loose fittings.
  • Replace worn tubing or O-rings; patch small basin cracks with waterproof sealant.
  • A cracked pump housing usually means replacing the pump.
Quick triage — pick your path

Get started

Choose the option that matches what you see. You can jump straight to that section.

Steps

Goal: Locate the leak and fix tubing, O-rings, or basin cracks.

Unplug and empty

Goal: Work safely with no water or electrical hazard.

  • Unplug the fountain. Drain or siphon the water. Confirm the fountain is dry.
  • Good: Clear access to pump and tubing. Proceed to Locate the leak.
  • Bad: Cannot empty—check for a drain plug or siphon from the top.

Locate the leak

Goal: Find where the water is escaping.

  • Refill partially and run briefly. Watch for water at the pump, tubing, basin seams, or spout.
  • Good: You identify the leak. Proceed to Replace parts or Patch basin.
  • Bad: Cannot locate—run longer and trace the wettest area.

Replace parts

Goal: Fix leaks at tubing or pump connections.

  • Replace cracked tubing with the same diameter. Replace worn O-ring or gasket with an exact match. Secure connections.
  • Good: No drips when the fountain runs. Proceed to Verification.
  • Bad: Pump housing is cracked—replace the pump. See Replace pump.

Patch basin

Goal: Repair small cracks in the basin.

  • Dry the area. Apply waterproof sealant per product instructions. Allow full cure before refilling.
  • Good: Sealant covers the crack and holds. Proceed to Verification.
  • Bad: Crack is large—the basin may need replacement.

Replace pump

Goal: Fix a leak from a cracked pump housing.

  • Order a replacement pump with the same flow rate. Swap tubing and test.
  • Good: No leaks from the pump. Proceed to Verification.
  • Bad: Wrong pump size—check flow rate and dimensions.

When to get help

Call a fountain installer or electrician if:

  • The basin has large cracks and cannot be patched.
  • There are electrical issues with the pump.
  • You are not comfortable with the repair.

Verification

  • No drips at the pump, tubing, or basin when the fountain runs.
  • Water level stays stable.
  • The fountain operates normally.

Reviewed by Blackbox Atlas

Frequently asked questions

Where do fountains usually leak?
Common spots: the pump housing seal, tubing connections, the basin (especially at seams or corners), and where the spout meets the basin. Outdoor fountains can crack from freeze-thaw cycles.
Can I fix a fountain leak myself?
Yes, for loose tubing, worn O-rings, and small basin cracks. Use waterproof sealant for basin cracks. A cracked pump housing usually requires pump replacement.
When should I call a plumber for a fountain leak?
Fountains rarely need a plumber. For large basin cracks, complex plumbing, or electrical issues, call a fountain installer or electrician. Most fountain leaks are DIY-repairable.

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