rainwater collection capitol container corp - obtain a food-grade water drum from here place barrel on cinderblocks or pallets to increase water pressure (1 foot height = 0.5 psi) put screen over barrel and have hose dump into it without puncturing it (this filters out debris, mosquitoes and other animals) install 0.75" bulkhead for compatibility with hoses "foul flush system" for discarding initial sediment possibly collect water from rainspout one floor up