If a ball bursts or loses air due to temperature fluctuations, this is NOT covered by the warranty, is not a reason for complaint, and there will be NO exchange or refund!
The ball should only be inflated to game pressure right before use. Otherwise, always release some air. Do not leave it in direct sunlight (e.g., on the beach or behind a window), as the ball may burst. The same result could occur if the ball is played in cold temperatures and then stored in a warmer room. The air inside would expand to the point of damaging the bladder.