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Old 07-23-14, 09:55 AM   #1
sunspot
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Join Date: Apr 2012
Location: Vancouver Island, BC
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Default sand filter - construction has begun!

I've started building a sand filter for our rain water collection system. It's to be a non-backflushable slow sand filter. The vessel is a 4000 litre (1000 gal) plastic cistern (I made a mistake on the tank size when I first posted - fixed now). I'll be using drain rock, pea gravel, and 20/50 filter sand as media and would like to hear what options I have for a barrier between the pea gravel and filter sand to stop migration of the sand into the gravel. Is landscape cloth food grade? Would a cotton sheet stand the test of time?



Last edited by sunspot; 08-23-14 at 09:21 AM.. Reason: math
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