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Yes, you can use housewrap. The lighter Tyveks will leak if touched and full of water, but I haven't seen this with housewrap.
I do not believe anything will leech into the water. It's a spun poly-olefin (think, a plastic layer of cotton-candy-webbing) and I don't think any of it will leech out. I am not 100% sure, though. Maybe someone with a better chem/materials background can shed light here.
-mox
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