Below is a nice view of the inside of the pipe between the washing drum and the drain pump (looking in the direction of the washing drum). I just found a popsicle stick and a few socks in there.
I was wondering what the black rubber balloon thing right below the outflow of the washing drum is called, what it's used for and how it works? It's soft (has air inside), has a hole at the bottom and is somehow attached right below the outflow of the washing drum so it can move up and down.
(Washing machine is a Siemens IQ500)