Grohe Adagio concealed cistern question

[miss.otter]

Hi there,

I had planned to connect the Grohe Adagio cistern in an adjacent room from the WC - please see the diagram below.



The Grohe technical brochure diagram states a max distance of 407mm from cistern to WC - however the distance I am proposing is around 630mm.
Does that mean that my proposal will not work?
Does anybody know of a cistern make where this might work?

Thanks everyone!

 

[Mike Jackson]

You may get away with it if you raise the cistern height to overcome the resistance of the extra length.