Drew,
I was told by a membrane expert that you should use soft water to rinse your membrane. Water should be low in iron and manganese. He also said not to use sap to rinse your membrane. You will just pack the membrane with junk from the sap and reduce the effectiveness of the membrane. The expert also said to do the water rinse with the size of the membrane. 600 gal membrane = a 600 gallon rinse
I have a deep well at my sugar house and had a water test done to check for hardness. Not good water, lots of minerals and very hard. I had my well at home tested and the water was soft with low minerals. So I have to haul my start up rinse water from home. Kind of a pain hauling 1,200 gallons of water 3.5 miles to the sugar house to do the rinse.
Joe
2004- 470 taps on gravity and buckets
2006- 590 taps on gravity and buckets 300 gph RO
2009- 845 taps on vacuum no buckets, 600 gph RO
2010- 925 taps on vacuum new 2 stage vacuum pump
2014- 3045 taps on vacuum, new 1200 gph RO
2015- 3104 taps on vacuum
2017- 3213 taps on vacuum
3' x 10' oil fired evaporator with steamaway