For taps that have the valve nut inside the body, remove the small plastic cap at the top of the tap to reveal the screw, which connects the knob to the spindle.
Os yw nyten y falf wedi'i lleoli yng nghorff y tap, tynnwch y caead plastig bach ar ben y tap er mwyn gweld y sgriw, sy'n cysylltu'r bwlyn â'r echel.