Fit the Galassia push button housing into the cistern lid and secure with the washer and backnut, aligning the ratchet bar slots left and right Make sure the flush valve is in place Properly in the Cistern and the the cistern lid secured onto the cistern. Whilst holding the Top of the Push button Gently screw this onto the Top of the Flush Valve through the Hole on the Cistern Lid until all the thread is gone in