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How to replace the oblong button kit from a Caroma tank

The oblong dual-flush button kits on Caroma tanks are held in place by a single plastic bracket on the underside of the tank lid.

Using a medium Phillips screwdriver remove the bolt holding the bracket in place.

Turn the tank lid back over and pull the button kit upwards. 

To replace the button kit, push it back into the hole in the tank lid, place the plastic bracket back over the underside of the button kit and attach with bolt.