Grainfather Wort Chiller.
The Grainfather wort chiller is thre fastest way to chill your wort. They have similar efficiency to the plate chillers, but are easier to clean as they do not have all the small crevasses to trap hop material and other solids.
The input and output are approximately 10mm as an outside diameter. The copper is a very good conductor of heat and will cool 23L of wort in under half an hour!
These can be used with gravity but it is recommended to use with a pump.
Upgrade your Chiller with the Grainfather Counterflow chiller to rapidly chill your wort and save yourself the messy clean up!