Setup, Compatibility & Care
To install the seal, turn off the water supply and flush the cistern to drain it. Access the flush valve by removing the cistern lid; you do not need to unscrew the cistern from the pan. Rotate or lift the flush valve mechanism as required by your specific Optima configuration to expose the old washer. Remove the old seal, clean the mounting surface of any limescale or debris to ensure a smooth contact point, and seat the new Siamp Optima Outlet Seal firmly in place. Always ensure the seal is seated flat to avoid leaks. For ongoing care, periodically wipe the seal area during routine cleaning to prevent mineral buildup.