How to Tell If Your Pool Has a Leak

pool leak detection

There is nothing quite like a refreshing dip in the pool on a hot afternoon. But if you find yourself dragging the garden hose over to the edge every other day just to keep the water level up, that relaxation can quickly turn into stress.

Owning a pool comes with maintenance, but constantly refilling it shouldn’t be part of the routine. A leak might start small, but leaving it unchecked can lead to structural damage, eroded landscaping, and a sky-high water bill. Early pool leak detection is the best way to protect your investment and keep your backyard ready for fun.

How Much Water Loss Is Normal?

Before you panic, it is important to know that losing some water is completely natural. Evaporation is a constant process, especially during the summer months when the sun is beating down.

On average, a swimming pool can lose about a quarter of an inch of water per day just from evaporation. This amount can increase if it is particularly windy, if the humidity is low, or if you have a heater running. Plus, if you have kids doing cannonballs or a dog shaking off on the deck, splash-out accounts for a decent amount of water loss, too.

However, if you are seeing the water level drop by more than half an inch a day without heavy usage, or if you are adding water more than once a week, it is time to investigate. This is where understanding the signs of a leak becomes crucial for effective pool leak detection.

Signs to Watch For That Indicate a Leak

Leaks are often sneaky, hiding underground or in plumbing lines where you can’t easily see them. Fortunately, your pool will usually give you clues if you know where to look.

Rapid Water Level Drop

The most obvious sign is a water level that refuses to stay put. If you mark the water line with a piece of tape and come back 24 hours later to find it has dropped significantly—more than that typical quarter-inch evaporation rate—you likely have a problem.

Visible Cracks or Gaps

Take a walk around the edge and inspect the structure. Small hairline cracks in the plaster or concrete might seem cosmetic, but they can deepen over time. Look closely at the tile line and the coping stones. Gaps in the grout or cracks in the bond beam can be entry points for water to escape behind the shell.

Wet Spots Around the Pool

Unless someone just got out of the water, the ground around your pool equipment and the perimeter should be relatively dry. If you notice persistent soft, mushy spots in the grass or standing water near the pumps, you might be dealing with an underground pipe failure. This is a classic indicator that you need professional pool leak detection services.

Air in the Pump or Filtration System

Your pool’s plumbing system should be airtight. If you see air bubbles shooting out of the return jets or notice the pump basket lid has a large air pocket inside, it means air is being sucked into the system through a leak on the suction side. It’s like trying to drink from a straw with a hole in it—the pump has to work much harder to move water.

Buckling or Lifting Decking

Water escaping into the ground can wash away the soil supporting your deck. Over time, this erosion causes pavers to sink or concrete slabs to lift and crack. If your pool deck looks uneven or is shifting, the root cause could be a leak undermining the foundation.

Reduced Chemical Levels

Are you adding salt, chlorine, or stabilizers constantly, but the levels never seem to balance? When water leaks out, it takes your expensive chemicals with it. If you are burning through your supply faster than normal, a leak is the likely culprit.

Common Pool Leak Locations

Leaks can occur almost anywhere, but they tend to favor a few specific spots. Understanding these common trouble zones can help you communicate better with a pool leak detection specialist.

  • Pool Shell and Plaster: As the ground settles, the concrete shell can develop structural cracks.
  • Tile and Grout Lines: The seam where the tile meets the skimmer is a frequent leak point.
  • Skimmer and Returns: The plastic skimmer housing can separate from the concrete pool wall.
  • Main Drains: Located at the deepest point, gaskets around the drain can wear out.
  • Equipment and Lines: Vibrations can loosen fittings on pumps, filters, and heaters.

Why You Should Call a Professional

While a bucket test can confirm you are losing water, finding the exact source is a different story. Guesswork often leads to unnecessary digging and wasted weekends.

A professional pool leak detection service uses specialized technology to pinpoint issues without tearing up your yard. They utilize pressure testing to check plumbing lines, sensitive sonar equipment to listen for escaping water underground, and electronic scanners to find pinhole leaks in vinyl liners.

Hiring an expert ensures you find the problem accurately and get a clear plan for repair. It saves you money on water bills and prevents minor issues from becoming major renovations.

Don’t Let a Leak Drain Your Wallet

If you suspect your pool is losing water, waiting will only make the repair more expensive. Acting fast protects your property and gets you back to swimming worry-free.

Need help finding the source of the problem? Contact Backyard Innovations today to schedule an inspection and get your pool back in perfect shape.