Hi All, I am presently doing a bit of research into some new taps for my new bathroom an as such had been looking at some "Grohe" taps. The particular question i thinks relates to many tap manufacturers, some taps come with the option to have a "pull out spout with mousseur" , "integrated non-return valve" and a "double protected against backflow ". What if anything anr any of these options used / useful for.
Regards
Seamus mc Loughlin