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This link has lots of great info on using and testing PVC for chemicals: http://www.thehappycultivator.com/247/is-growing-plants-in-pvc-safe-for-hydroponics/
On the other hand, these folks advise against using PVC: http://www.organicagardensupply.com/hydroponics/hydroponic-garden-food-grade-plastics/
Thanks! The issue is not PVC alone, but PVC + liquid chemical fertilizer used for nutrients. How do those chemicals interact with whatever's in the (non-food-grade) PVC? Very different from running plain old H2O through PVC piping that's specifically made for plumbing, right?
How do you know if the fence post is made from food-safe plastic? One class of endocrine disruptors called phthalates is present in plastic products containing PVC. Phthalates are loosely bound to plastic and easily absorbed into food, beverages and saliva, and like BPA, have been commonly detected in our bodies. Most concerning is the effect phthalates have on reproductive health in males. Exposure in fetuses has been linked to the malformation of the male reproductive system. See also: http://www.alternet.org/personal-health/toxic-traps-when-these-7-types-plastic-are-dangerous
Well done!!! Thank you, Jake!!!
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