Hello, my filtered friend. Just follow the simple-minded instructions our flatulent host provided you and make the necessary corrections / connections. Only you can trace out the tubing and determine where they are going and where they should go.
It is highly unlikely that the filter would be damaged by reverse flow. More likely is that you back flushed the filter and drank whatever contaminants it had caught. How are the bowels doing? If still okay by tomorrow, then you have nothing to worry about. Unless you are an infidel and then you should be worried about the eternal wrath of Allah, the Compassionate and Merciful... except to infidel pig-dogs.
- Samurai Appliance Repair Man likes this