Hi there. These may be ...

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Hi there. These may be appropriate options for your question #1: https://www.offgridbox.com/  , https://www.osmosun.com/en/ , https://rainfresh.ca/product/emergency-disaster-relief-water-purification-systems/#tab-product_editor_12294_tab

As for your question #2, I am not familiar with sand abstraction, but this product may be similar: https://mwipumps.com/products/solarpedalflo/

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