Since the infusion set needs to be changed every two to three days, it is considered a
chatzitzah and must be removed prior to immersion. She can try to time it so that her immersion will be around the time she needs to change the piece.
She should perform all her
preparations for immersion with the infusion set and catheter still attached. Just before immersion, she should remove the entire piece and clean off any sticky residue on her body. After her immersion, she should insert the new infusion set right away. This way, she will only have the insulin pump removed for a matter of minutes.
Please feel free to get back to us with any further questions.
B’hatzlacha!