Minimize the Time a Pool is Left Empty to Prevent Damage

Leaving a pool empty for extended periods, generally more than a few weeks, is strongly discouraged due to potential structural damage. The absence of water pressure can cause concrete or fiberglass shells to crack, shift, or even float, especially in areas with high water tables. It also exposes surfaces to UV damage and debris accumulation.

Risks of an Empty Pool

Removing water eliminates the counteracting pressure against external forces from soil and groundwater, significantly increasing damage risk.

• Structural Damage: Cracking, heaving of concrete; floating or buckling of fiberglass due to high water tables.
• Surface Damage: UV exposure causes fading, brittleness, blistering. Debris leads to staining.
• Seal Degradation: Gaskets, O-rings, and pump seals dry out and crack, causing leaks.
• Pest Infestation: Empty pools attract rodents and insects, causing damage and unsanitary conditions.

When Draining is Necessary

Draining is unavoidable for essential maintenance, structural repairs, or resurfacing projects.

• Only drain for specific, required maintenance.
• Complete work as quickly as possible to minimize exposure.
• Consult a qualified professional for guidance, especially regarding groundwater.

Comparison of Pool States and Risks

Best Practices When Draining

• Monitor groundwater levels to prevent hydrostatic pressure issues.
• Schedule draining and refilling promptly (within days to a week).
• Cover internal surfaces to protect from UV rays and debris.
• Inspect and replace any dried or cracked seals before refilling.