I have noticed lots of new Harvestright Freeze Dryer owners and the worst thing about freeze drying is oil changes. Here's how to make an inexpensive filter that will clean your oil and make oil changes a snap and less than 1 minute. Keeping your oil clean will extend your vacuum pump life and save you from future problems. Please note: DO NOT USE DAIRYLAND OIL in the Premier Vacuum Pump made 2017 and after.
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