OldTimey Dave's Cider Blog

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Gang filters

Sterile filter setup used for stabilizing sweet ciders. Cleared, cold-shocked, off-dry or sweet ciders are pushed from keg A through two filters, each with two pads apiece. Filter 1 filters down to 2 microns, then filter 2 goes down to 0.5 microns, effectively leaving the cider free of yeast. I generally add 25 ppm sulfite to keg 2 and keep under CO2 pressure to prevent oxidation. Filtering happens at 7-10 psi system pressure.