Overflow from concealed cistern

[Redhotferrari]

Hi Guys,

Have a concealed cistern, and for various reasons want to divert the overflow back into the flush pipe, Cant change the flush to one that facilitates internal overflow.

Have seen a bracket/attachment in places, where the overflow comes out of the cistern as normal bends down but instead of going outside, angles back to the flush pipes and connects into it, cant think what this attachment is, any advice?

I know these are not the best looking things, but as its concealed wont really matter.

Hope you can help

 

[cowley]

Plumbers merchants sell a clamp on fitting for the flush pipe to take the overflow i'm not sure what it's called but any good plumbers merchant will.

 

[Newboy]

If you have a standard siphon, can you not change it for a short siphon or a fluid master flap valve?