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Swimming Pool Leak Detection: A Complete Guide

Dec 19, 2024

A leaking swimming pool can quickly turn from a minor inconvenience to a significant problem if left unaddressed. At Blue Lagoon Pools in Sinking Spring, PA, we understand how important it is to catch leaks early to save water, prevent equipment damage, and avoid costly repairs. Here’s everything you need to know about swimming pool leak detection and repair to keep your pool in top condition.


Recognizing the Signs of a Pool Leak

Before fixing a leak, you need to confirm it exists. Some common signs include:

  • Unusual Water Loss: Losing more than 1.5–2 inches of water per week could indicate a leak. Rule out evaporation first (more on this below).
  • Wet Spots Around the Pool or Equipment Pad: Look for standing water, damp soil, or erosion near the pool or equipment.
  • Unstable Water Levels: If your pool water stabilizes at a specific level, the leak could be located at that height, such as around the skimmer or return jets.
  • Unexplained Utility Increases: Higher water and energy bills could be a red flag.

Pro Tip: Leaks aren’t exclusive to inground pools. Above-ground pool leaks can soften the surrounding soil, leading to structural issues like shifting or wrinkling.


How to Confirm a Pool Leak: The Bucket Test

The bucket test is a simple way to determine if water loss is due to evaporation or a leak:

  1. Fill a 5-gallon bucket with pool water and place it on a pool step.
  2. Mark the water level inside the bucket and the pool’s water level outside the bucket.
  3. Leave the bucket in place for 24–48 hours (ensure no auto-fill devices are on).
  4. Compare water loss in the bucket to the pool. If the pool water drops faster, you likely have a leak.

Pinpointing the Source of the Leak

Once you’ve confirmed a leak, the next step is locating it. Here are some of the most common sources:

1. Skimmer Leaks

The connection between the skimmer and the pool wall is a frequent culprit. Check for cracks around the skimmer faceplate or evidence of debris being pulled into small gaps.

2. Pool Liner Leaks

In vinyl pools, leaks often occur in stretched or gasketed areas like corners, steps, or around fittings. Use goggles and closely inspect the liner for tears or punctures.

3. Pool Light Leaks

Leaks can develop in the light niche or conduit. If the water level stabilizes at the height of the light, this is a likely source.

4. Plumbing Leaks

Underground pipes rarely leak unless there has been significant soil movement or freeze damage. If the pool leaks more when the pump is running, the issue could be in the return lines. If it leaks when the pump is off, it may be the suction lines.


Advanced Leak Detection Techniques

For persistent leaks, these advanced methods can help:

  • Dye Testing: Release a small amount of dye near suspected areas. If the dye is drawn into a crack or gap, you’ve found the leak.
  • Pressure Testing: Professionals use this method to detect leaks in underground plumbing by pressurizing specific sections of piping.
  • Electronic Leak Detection: Specialized tools like the LeakTrac system can pinpoint vinyl liner leaks by detecting electrical currents.

How to Fix a Pool Leak

Simple Fixes You Can Do Yourself:

  • Skimmers: Tighten screws or replace worn gaskets.
  • Pool Lights: Use underwater putty or silicone to seal gaps in the light housing or conduit.
  • Vinyl Liners: Patch small tears with an underwater vinyl repair kit.
  • Small Plumbing Leaks: Use products like leak sealers for minor cracks.

Complex Repairs Best Left to Professionals:

  • Cracks in Concrete or Plaster: Repairing structural cracks may require re-plastering or tiling.
  • Underground Plumbing: Leaking pipes under the pool deck may need excavation or pipe replacement.
  • Vinyl Pool Liners: Large tears or worn liners may require a full replacement.

Preventing Future Leaks

  • Regular Inspections: Check your pool’s equipment, fittings, and liner regularly for signs of wear.
  • Seasonal Maintenance: Winterize your pool properly to avoid freeze damage.
  • Maintain Water Balance: Balanced pH and alkalinity can prevent corrosion and extend the lifespan of your pool components.

Call Blue Lagoon Pools for Expert Leak Detection

If you’re dealing with a pool leak and need professional assistance, Blue Lagoon Pools in Sinking Spring, PA, is here to help. Our experienced team uses advanced leak detection tools and proven repair techniques to restore your pool’s functionality. Contact us today for an inspection and ensure your pool remains a source of enjoyment, not frustration!

About Blue Lagoon Pools

Blue Lagoon Pools is synonymous with luxury, offering pool builder services for fiberglass, vinyl liner, and concrete pools in Sinking Spring, Pennsylvania. Trust Blue Lagoon Pools as your choice pool builder to design, build, and maintain your Sinking Spring swimming pool and spa, with a 100% satisfaction guarantee.

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