The syrup prefilters as well as the cone filter are washable, just wash in clean water and never wring to remove water, just squeeze them. If you wring them, you break the filter fibers and render it useless.
To aid in filtering you can also mix some Filter Aid (food grade DE) into the syrup just before adding it to the filter, if doing a 1 gal batch (make sure it's hot, add about 1/2 cup DE, stir, then pour it into the cone filter. The DE will not pass thru the filter, and it becomes the best filter available. The DE catches the niter and builds up on the filter, creating an ever thickening filter cake. Wash when done. To buy the small amount of DE you will need, either buy some from another bigger producer or order it from The Maple Guys, they sell a small bag. Do not use swimming pool DE, it is not the same and is not food grade.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.