[timberrr59]

Folks, I do not have a camera. Do check the Internet for general harvesting details. Texas rainwater collection.com has a good downloadable manual. Ideally with 1 inch of rain, a little over 600 gallons can be collected from a 1000 square foot roof. With cedar trees and winds, I get about 500 gallons/1000sqft.
Here is what I do for pressure: Gravity-we have three 1100-gallon black poly tanks bought at a Tractor Supply Store in Kerrville. They are about $600 each. Since this is hilly ground where we live, two of the tanks are on the ground at the source of collection. For enough pressure to make a second story shower work, I pump the collected water to a storage tank atop a hill behind our house. It is about 15 feet higher than the other two tanks. I use basement sump pumps to transfer the water up the hill. One of the pumps is only 1/6HP bought at Home Depot for about $70. All the piping is schedule 40 PVC. As the water comes off the roofs, it is screened at the gutter opening, then at the downspouts. At this point there are two 4" PVC standpipes which fill with roof wash water and it is not collected in the tanks. Collected water is filtered at the tank entry with a home-made Y strainer. Finally inside the tanks, I use a women's stocking support hose clamped to a 2" PVC 90 final pipe fitting. This last filter effectively collects any fines or mud in the water. In order to drink rainwater safely it is a good idea to filter once more with a 5 micron filter and then run it through a UV purifier, just in case of bacteria. The UV sterilizes the bacteria if present.
The improvement will be for me to buy a 12volt DC RV transfer pump and then power it with a Solar Photovoltaic collector. It will be slower transfer, but it will be GREEN! Whatever you use- keep all fittings sealed against mosquitoes. This is not a too-hard project. Next to donating blood (not from shaving!), collecting rainwater is something that I feel is noble in life. If you do rig up a system you will sleep much better knowing that you are part of a solution and NOT part of a problem!... RRR