how to fix a leaking pool waterfall

Fixing a leaking pool waterfall involves identifying the source of the leak and taking appropriate steps to repair it. Here are the steps to help you fix a leaking pool waterfall:

Materials You May Need:

  1. Pool Patch Kit: A patch kit designed for use in pool applications.
  2. Pool Caulk or Sealant: Waterproof sealant suitable for pool use.
  3. Pool Putty (if needed): Underwater epoxy putty for sealing larger gaps or cracks.
  4. Submersible Pump (optional): To lower the water level in the pool.


  1. Turn Off the Waterfall:
    • Before you begin any repair work, turn off the waterfall pump and any associated water features to ensure your safety.
  2. Drain the Waterfall Area (if necessary):
    • Depending on the location of the leak, you may need to lower the water level in the pool or the waterfall area. You can do this using a submersible pump or by simply turning off the pool’s autofill system and allowing the water level to drop.
  3. Inspect for Visible Damage:
    • Carefully examine the waterfall structure, including the pool’s surrounding area, for any visible cracks, gaps, or damaged components that may be causing the leak.
  4. Identify the Leak Source:
    • If you can identify the source of the leak visually, mark it for repair. If not, you may need to perform a more detailed inspection, including running water through the waterfall to observe where the leak occurs.
  5. Clean and Prepare the Area:
    • Clean the area around the leak to remove any debris, algae, or loose material. Ensure that the surface is dry before proceeding.
  6. Apply Pool Patch Kit:
    • If the leak is in a small crack or hole, use a pool patch kit. Follow the manufacturer’s instructions for mixing and applying the patch material. Typically, you’ll spread the patch compound over the leak and smooth it out with a trowel or putty knife.
  7. Use Pool Caulk or Sealant:
    • For smaller leaks or gaps around joints and seams, apply pool caulk or sealant according to the product instructions. Make sure to create a watertight seal.
  8. Apply Pool Putty (if necessary):
    • For larger gaps or cracks, underwater epoxy putty (pool putty) may be needed. Knead the putty according to the manufacturer’s instructions and press it into the leak area. Smooth it out to ensure a proper seal.
  9. Let the Repair Cure:
    • Allow the repair material to cure or set as per the manufacturer’s recommendations. This typically takes several hours to a day or more, depending on the product used.
  10. Refill and Test:
    • Once the repair has cured, refill the pool or waterfall area to its normal water level. Turn on the waterfall pump and test to ensure that the leak has been successfully repaired.
  11. Monitor for Leaks:
    • Keep an eye on the repaired area over the next few days to ensure there are no signs of leakage. If you still notice a leak, you may need to revisit the repair or consider seeking professional assistance.
  12. Regular Maintenance:
    • To prevent future leaks, perform regular maintenance on your pool waterfall, including cleaning, inspecting, and addressing any issues promptly.

If the leak persists despite your efforts or if the damage is extensive, it’s advisable to contact a pool professional or a contractor experienced in pool and waterfall repairs. They can conduct a thorough assessment and perform more extensive repairs if needed to ensure the waterfall operates without leaks.