If a ball bursts or loses air significantly due to temperature fluctuations, this is NOT covered under warranty, is not grounds for a complaint, and no exchange or refund will be provided!
The ball should only be inflated to playing pressure during use. Otherwise, always release some air. Do not leave it in direct sunlight (e.g., at the beach or behind a window), as this may cause the ball to burst. The same issue may arise if the ball is played in cold temperatures and then stored in warmer environments. The air inside expands to the point of damaging the bladder.