CRACK IN POOL SHELL? COULD IT BE LEAKING?
If you’ve noticed a crack in your pool wall, floor, or steps, it’s natural to wonder whether it’s causing water loss. While not every crack leaks, some structural cracks can allow water to escape and lead to ongoing water loss, higher bills, and damage beneath the pool.
The key is determining whether the crack is cosmetic or an active leak.
DO ALL POOL CRACKS LEAK?
No. Some cracks are purely cosmetic and affect only the surface finish.
Others may extend deeper into the structure and allow water to escape.
Common crack types include:
- Surface plaster cracks
- Shrinkage cracks
- Structural shell cracks
- Settlement-related cracks
- Step and bench cracks
- Cracks around fittings and penetrations
Without proper testing, it’s difficult to know whether a crack is actively leaking.
SIGNS A POOL CRACK MAY BE LEAKING
Look for these common symptoms:
- Pool loses water regularly
- Water level drops more than normal evaporation
- Crack appears to widen over time
- Water level stabilizes near the crack elevation
- Staining or deterioration around the crack
- Bucket test confirms water loss
Not all leaking cracks are visible above the waterline.
QUICK CHECKS YOU CAN DO BEFORE CALLING A PRO
1) Monitor the crack
Take photos and compare them over time.
Look for:
- widening
- movement
- discoloration
- separation
Changes may indicate a more serious issue.
2) Perform the bucket test
Before assuming the crack is leaking, determine whether you’re losing water beyond normal evaporation.
👉 Related: Bucket Test Guide
3) Watch where the water level stops
If the pool consistently stabilizes at a certain elevation, the leak may be located near that level.
👉 Related: Pool Water Level Stops at One Level
4) Check for multiple cracks
Sometimes what appears to be one crack is part of a larger structural issue.
Inspect:
- walls
- floor
- steps
- benches
- tile line areas
WHY YOU SHOULDN’T IGNORE A LEAKING POOL CRACK
An active structural crack can lead to:
- Continuous water loss
- Higher water bills
- Chemical waste
- Soil erosion beneath the pool
- Deck movement or settlement
- Larger structural repairs later
The sooner a leak is confirmed, the easier it is to address.
HOW PROS CONFIRM A SUCTION LINE LEAK
To pinpoint the source, professionals may use:
- Suction-side inspection
- Valve and union testing
- Line isolation testing
- Vacuum testing
- Pressure testing when needed
- Equipment pad inspection
Once confirmed, we determine whether the issue is an equipment seal, valve, fitting, clogged line, or underground suction line leak.
WHEN TO SCHEDULE LEAK DETECTION
Schedule professional pool leak detection in Tampa if:
- You notice a crack in your pool shell
- The bucket test suggests a leak
- Water loss continues beyond normal evaporation
- The crack appears to be growing
- You want to confirm whether the crack is actually leaking
If you’re in Tampa and have a crack in your pool shell, we can determine whether it’s causing water loss and recommend the right repair.
RELATED GUIDES
- Pool Losing Water Fast
- Bucket Test
- Pool Water Level Stops at One Level
- Pool Light Leak
- Pool Skimmer Leak
FREQUENTLY ASKED QUESTIONS
DOES A CRACK IN MY POOL ALWAYS MEAN IT’S LEAKING?
No. Some cracks are cosmetic and do not allow water to escape. Proper testing is needed to determine whether the crack is active.
CAN A SMALL CRACK CAUSE A BIG LEAK?
Yes. Even small structural cracks can allow significant water loss over time.
HOW CAN I TELL IF A POOL CRACK IS LEAKING?
Signs include ongoing water loss, water level stabilization near the crack, and dye being pulled into the crack during testing.
CAN A LEAKING CRACK GET WORSE?
Yes. Water movement, ground settlement, and temperature changes can cause structural cracks to grow over time.
CAN YOU CONFIRM WHETHER THE CRACK IS THE SOURCE OF THE LEAK?
Yes. Professional leak detection testing can determine whether the crack is actively leaking or if the water loss is coming from another source.