Filter for Fast Drain Check Valve Assembly, used on the Biolytic 3900 and Dr. Oligo 48, Pack of 10.
This was added to the Biolytic 3900 and the Dr. Oligo 48 fast drain check valves and the purge pipe check valve to stop liquid from getting into the slow drain system tubing.
This is a disposable filter. The filter should be changed annually.
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