Grainfather Pump Filter

The filter is designed to work more efficiently and suck more wort up so you will leave less wort behind in the boiler.
The part that connects the filter to the boiler is also made of silicone and means if you bump it with your paddle when stirring it is flexible and won't come off. Can be disassembled for easy cleaning.

Spare part number 14 on the anatomy chart for the Grainfather.