factorio 0.17.53 x64

i have make a little settup to recycling some junk in my inventory.
but i have a little probleme with fuild :D
oil and water are mixed
https://image.noelshack.com/fichiers/2019/27/2/1562019635-2019-07-02-000808-1920x1080-scrot.png
https://image.noelshack.com/fichiers/2019/27/2/1562019635-2019-07-02-000905-1920x1080-scrot.png

Okay, so in this example, you're recycling some item that used oil and heavy oil, and then combining the outputs of two of these machines? And then water somehow randomly leaks into the system?

Or are you recycling random things, and find water in the pipes sometimes? Have you recycled anything that uses water in its recipe?

i have recycled flamme cannister, and sulfure
heavy and light oil on origin, and after; i have some water/petrol on tanks :/

it's like a "joker fluid" if i add water, all tanks become water, if i add other, all this fluid change