Would agree with Rob99 The IP rating is based on it withstanding being submerged in fresh water (up to 1 metre I think ) for 30 minutes with the device being static Any movement of the device or flowing water ( and water jets !!! ) will obviously create more " water pressure " which could then exceed the rating. Also bear in mind that pools etc tend to have chemicals in the water !
Each to their own
😀 but I wouldn't do it with mine