Bouncy castles and inflatables are inflated with fans and blowers, which are typically electric-powered or petrol-powered. As the fan is constantly on, small holes and leaks do not necessarily create big problems.
It is recommended to use an RCD or circuit breaker for any electrical equipment.
It is important to inflate bouncy castles fully before use, as partially-inflated products may create a health and safety risk.
To set up your inflatables:
Every inflatable has different requirements. Make sure you use enough pegs or sandbags to secure the inflatable. You may find exact requirements in the individual bouncy castle's manual.