
Using a filter to coarsely filter beer as it is pumped from the primary to the secondary fermenter. I fill it with polyester batting (100% polyester, nothing else), an old trick I learned in the reef aquarium community. Works perfectly.

NANPU 1 FRL Air Filter Regulator Lubricator Combo With 0-150 Psi Gauge, 5 Micron Brass Element, Poly Bowl & Semi-Auto Drain - Metal Bracket Included
20 Review

NANPU Compressed Air Filter Regulator Combo: Brass Element, Semi-Auto Drain, 0-150 Psi Gauge, And More
21 Review

Filter under the sink Aquaphor Favorit ECO silver
20 Review

NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review