Hi Openwater,
Do you keep you're Walnut sap separate from your Maple?
Black Walnut tapping
2021 - 3 trees 5 taps enough to boil a sample.
~ 2 acres, 35+ mature Black Walnut
2022 - 30 Southern Ontario Walnuts tapped, 69 spouts.
650 litres (143 Imp gals) on sap bags, 14 litres (3 Imp gals) walnut syrup on turkey fryer.
2023 - 35 trees tapped, 28 mech vacuum & 7 on gravity. Propane fired custom evaporator, 2'x2' divided pan, 2'x1' preheat pan.
882 litres (194 Imp gals) mechanical & gravity vac turned into 18.25 litres (4.8 Imp gals) syrup off my DIY evaporator