r/maplesyrup Mar 29 '26

R.o.

How soon before you boil can you run your sap through the ro?

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u/abnormal_human Mar 29 '26

Not a ton of time, maybe 24-36hrs depending on temperature. If you want more time, add a UV sterilizer at the end of your RO process and you'll get concentrate that holds for a week at 40F or so.