Medela Breast Pump Questions

So my SIL is giving me her medela breast pump because she decided to switch to formula. She was talking about getting rid of her pump (only used it a handful of times) and I said I would take it because I am currently breastfeeding and my breast pump is a ameda which sucks.... gets the job done but I want something better but it's the only brand pump my insurance covers.


can I use the medela second hand? Is that a health concern? If I can what parts do I need to clean exactly? (I dont know if this pump is different than mine)

My SIL and her baby caught thrush a few weeks ago so if its not a concern to use a secondhand pump is there a certain chemical I should use to make sure it's really cleaned before using it?

Last is the medela in style pump an open or closed system?