This video demonstrates how to perform a backflush on a plate and frame filter during a beer filter session. This technique is useful if you run into an issue with a clogged filter. This can happen if you are attempting to filter a very hazy beer, using the incorrect type of filter media or using an undersized plate filter for the volume of beer you are trying to filter. It's very inexpensive to install the backflush trap and have it ready even if you don't have to use it. If you do run into an issue, its ready to go.