A. To install the Fluidmaster 747 Fill Valve Service Kit, you need to first turn the water supply to the toilet off. Using your fingers, turn the cap (usually blue but not always) connected to the copper (or plastic) riser tube a quarter of a turn counterclockwise to release the cap from the float assembly. A wrench should not be required. Once the cap is disconnected from the tabs keeping it in place, pull the float assembly straight off. Align the replacement Fluidmaster 747 fill valve service kit (float assembly) up and push it back into the cap and turn the cap clockwise a quarter of a turn until it tightens onto the tabs on the float assembly (fill valve service kit). Turn your water back on and check for leaks.