This versatile filter is a beer maker's insurance policy! Whether you’re aerating or racking you will appreciate having the peace-of-mind of knowing that your brew will not be contaminated by whatever is floating around in the air. Use it anywhere you need to keep something sanitary. Both 1/4"" and 3/8"" tubing will attach to it, and it will snugly fit in any standard stopper as well.
About the inline filters: There are two sides to the filter - an "in" and an "out". The direction you use doesn't matter, however, you want to take note of which way you first push air through it and always keep it that way. There is an arrow on the edge of the filter housing that we use to keep the airflow going one direction when using it. The filter should never get wet, so don't try and sanitize it by dunking it in sanitizer. If you want to clean the outside of it, use Alpet D2. To store the filter, use a little tinfoil on the "In" of the filter and store in a zip-lock bag. Can last up to 1 year. Discard if there are any signs of discoloration.
This product qualifies as a HEPA filter under US government standards.