Replacement Toilet Flush

[Davey]

I need to replace our toilet flush as its making a lot of noise. The existing one has an external overflow pipe but I'd like the new flush with an internal overflow as we're due to have an extension built where the existing overflow pipe exits.

Toolstation have the following available in 9.5"

http://www.toolstation.com/shop/Plumbing/Toilet+Fittings/Dual+Flush+Syphon+95/d20/sd2835/p56485

Does anybody know if this is external or internal overflow - it doesn't say in the catalogue?

Thank you

Davey

 

[seco services]

yes it has internal overflow

 

[Davey]

Great - thank you Seco

The wing nuts are soaking in WD40 at the moment and gonna invest in a new fitting kit complete with donut as well.

No doubt I'll be back if it doesn't go as smoothy as planned

Cheers

Davey

 

[Charnwood]

Forget the syphon, spend a bit more and fit a Fluidmaster flapper valve.
Dual flush, internal overflow and easy maintenance.

All syphons are internal overflow, so long as the top of the syphon is below the level of anywhere else water could 'overflow'.
All that happens is when the water level rises in the cistern it travels up inside the syphon and overflows via the inverted 'U' of the syphon. There's no such thing as a non internal overflow syphon.

It's the height that matters.
All cisterns with syphons as standard now leave the factories with 71/2" high syphons.