Since you could just lift it away from the body and wash without unlocking, I imagine you could wear it indefinitely without removing it or unlocking it.
I am considering buying an inverted chastity cage but many seem to come with a tube or fixed urethral tube but I need to know more about the problems if any with inserting a tube. I am anxious to avoid it I as have been there and don't wish to repeat experience. Any advice would be welcome.