Maybe a dumb question, but here it goes anyway. I would like to install an irrigation system in my own yard. Feel somewhat confident that I could lay the piping and sprinklers. As far as the backflow, pressure valves, wiring, and whatever else I'm in the dark. Would it be possible just to lay the pipe with a fitting to just hook up to a short garden hose w/ a timer to run the whole system? Is this possible? Would there be enough pressure just with a garden hose if it is possible? Thanks in advance.