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Dale Sparrow
03-15-2017, 07:15 PM
How long can the sap be left in the evaporator in between boils? Should sap be brought to a boil to keep from going sour?
WESTVIRGINIAMAPLER
03-15-2017, 07:33 PM
If this very warm yes it should be boiled every couple days to kill anything in it.
BAP
03-15-2017, 08:09 PM
Unless your sugarhouse is heated, I bet it is like mine and the sap has ice in it after all the zero degree nights we have had. If that's the case, it should be fine.
Dale Sparrow
03-15-2017, 10:55 PM
It did have some ice in it one morning which scared me, since then with this cold weather I've had a small electric heater going and a wood stove when it gets really cold. I have been watching the sap temp and it has been between 35-40 degrees. when checking on it today I noticed some slime in the cold sap float box, been sitting for 7 days.
maple flats
03-16-2017, 08:55 AM
With ice in it the sap will keep a long time, if heated to 40 it can spoil.
Dale Sparrow
03-16-2017, 07:13 PM
Brought the flue pan to 185 degrees today, the syrup pan was boiling. Then I shut it down. Gotta love oil. Isolated cold sap box, drained and cleaned. Good to go.
Mitchhorne8
03-16-2017, 08:11 PM
This both a statement and a question. In southern Quebec area and I knew there was going to be 2 weeks of real cold Temps so I drained everything put it in 5 gallon pails and put in a walk in cooler. It's been 16 days, still good?

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motowbrowne
03-16-2017, 08:35 PM
This both a statement and a question. In southern Quebec area and I knew there was going to be 2 weeks of real cold Temps so I drained everything put it in 5 gallon pails and put in a walk in cooler. It's been 16 days, still good?

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I would very much think so. Of course you should trust your nose when you open the buckets and when you start cooking it. If you're concerned about it you could cook a very small sample on the kitchen stove to see what it turns into.
Russell Lampron
03-17-2017, 06:55 AM
I always just leave the evaporator filled and let it freeze. It has sat for 3 weeks like that before and the sap was still good. My evaporator is a raised flue and there hasn't been any damage to the flues even with temps well below zero. If you have a drop flue you may want to drain it and let the sap freeze in buckets. Trying to keep it thawed will let the bacteria grow and the sap will spoil.
Dale Sparrow
03-17-2017, 07:20 AM
I am scared to let it freeze, I have seen what kind of damage can be done to metal from ice.