Understanding Pool Water Loss: Normal vs. Problematic

All pools experience some degree of water loss. Evaporation, particularly during hot, dry, and windy conditions, is a natural process. Sunlight, air temperature, humidity, and water usage all contribute. A typical pool can lose between ¼ and ¾ inches of water per week to evaporation alone. However, when water levels drop significantly faster than this rate, or require frequent topping off, it’s a strong indication that something more serious is occurring.

Common Causes of Pool Leaks

Pool leaks aren’t always obvious. They can stem from a variety of sources, categorized broadly as structural or plumbing-related. Structural leaks often occur in the pool shell itself – cracks in the plaster, vinyl liner tears, or damage to the concrete. Plumbing leaks, on the other hand, are typically found in the network of pipes, valves, pumps, and filters that circulate water. Common culprits include:

• Skimmer: Cracks or loose connections around the skimmer.
• Return Jets: Leaks around the return jet fittings.
• Pump and Filter: Issues with the pump housing, filter connections, or internal components.
• Main Drain: A cracked or improperly sealed main drain.
• Underground Pipes: Hidden leaks in the pipes buried beneath the pool deck.

Simple Tests to Detect a Pool Leak

Before calling a professional, several DIY tests can help pinpoint the source of the leak. The “Bucket Test” is a widely used method. Fill a bucket with pool water to just below the skimmer opening, and mark the water level inside and outside the bucket. After 24 hours, compare the water level drop in both. If the pool water level has dropped more than the bucket water level, a leak is likely present. Another useful test involves using a dye – available at most pool supply stores – to check for leaks around fittings, lights, and steps. Slowly release the dye near suspected areas and observe if it’s sucked into a leak.

Have you ever experienced a sudden, unexplained drop in your pool water level? What steps did you take to investigate?

Beyond these initial tests, a professional leak detection service utilizes specialized equipment, such as pressure testing and electronic leak detection, to identify even the most elusive leaks. These services can be invaluable, especially for complex or underground leaks.

Repairing a pool leak can range from a simple DIY fix, like tightening a loose fitting, to a more complex undertaking requiring professional intervention. The cost of repair will depend on the location and severity of the leak. Addressing leaks promptly not only saves water and money but also prevents further damage to your pool structure and surrounding landscaping.

Considering the potential costs associated with pool leaks, do you think preventative maintenance is a worthwhile investment for pool owners?

Learn more about pool leak detection methods.
Explore water conservation tips for pool owners from the EPA.
Find a certified pool professional through the Association of Pool & Spa Professionals (APSP).

Frequently Asked Questions About Pool Leaks

• What is considered a normal amount of water loss for a pool?

  Typically, a pool can lose ¼ to ¾ inches of water per week due to evaporation, depending on weather conditions.

• How can I tell if my pool is leaking, and not just evaporating?

  If your pool loses water at a rate faster than normal evaporation, or requires frequent refilling, it’s likely leaking.

• What is the bucket test for pool leaks?

  The bucket test involves comparing the water level drop in a bucket of pool water to the water level drop in the pool itself to identify leaks.

• Can I repair a pool leak myself?

  Minor leaks, such as loose fittings, can often be repaired DIY. However, more complex leaks require professional assistance.

• How much does it cost to repair a pool leak?

  Repair costs vary widely depending on the leak’s location and severity, ranging from a few dollars for a simple fix to hundreds or even thousands for major repairs.

• What are the signs of a leak in an underground pool pipe?

  Signs include wet spots around the pool deck, increased water bills, and the sound of running water when the pump is off.