You can easily disconnect from the pump for a period of up to 1 hours. If you choose to disconnect for a longer period, it may be necessary to take an injection of insulin using a pen or syringe. The connection is changed every 2-3 days. Just disconnect from the pump and reconnect later. Again, just disconnect and reconnect later.
Some pumps are water resistant and do allow for use in the water.
Children as young as 11 months are using the pump. Adults in their 80's have learned to use the pump. If you are motivated, reliable, and willing to test your blood sugar regularly, the pump can work for you. Both individuals with Type 1 and Type 2 diabetes can use it successfully. Insurance companies usually cover its expense and supplies.