Learn step-by-step how to replace a toilet fill valve. Simple, beginner-friendly instructions so you can fix a running toilet with confidence. • What a fill valve is & when to replace it • Tools you’ll need • Turn off water & drain tank • Disconnect supply line • Remove old fill valve • Install new valve & gasket • Reconnect supply line • Attach refill tube • Turn water on & check for leaks • Adjust water level • Test flush — All Handy, All Ready 💪🏽