Internal overflow toilet cistern flushing siphon.
9 inch refers to the internal overflow bridge and not the overall height.
Overall height inside toilet cistern is approx 10 1/2 inches (not including the threaded part, which is outside the cistern).
Please look at the 2 blue spots on the photograph. By adjusting these you can have the toilet set up to give a 6, 7 or 9 litre flush.
Full fitting instructions are printed on the plastic packaging of the unit. You can also download the instructions : Siphon fitting instructions
WRAS approved and made in the UK.
In the case of a close coupled pan you might find on removal that the doughnut type washer sealing between the pan and the cistern has been squashed or that the fixing bolts or fixing plates are rusting badly, we also supply these as spares if required.