The Ultra Fine Filter should be replaced/cleaned every 6 months. This filter collects food particles left behind in the dishwasher so the drain does not get clogged. This part does NOT come with installation instructions. This original GE Dishwasher Ultra Fine Filter originally shipped with the following GE devices: GDT680SGH7BB, GDF510PGD6BB, GDT625PSJ0SS This is a true GE part! This item is NEW! Don't see your model number? Send us a message as we are happy to help!