I had a Medtronic 523 as my first pump, so I have never let water get anywhere near it.
I kept this policy when I switched to my X2, but went canyoning for the first time and since I couldn’t take my phone I put my X2 and some sugar in a phone water pouch under my wet suit.
Apparently the seal didn’t do its job because halfway through I check my sugars only to see the entire pouch filled with water! (Good thing I didn’t bring my phone!)
Was very relieved that my t-slim worked fine the whole time (it’s been 3 days since the drowning ;))