I'm looking to put in a small patch of grass in my back yard and need to install some sprinklers. It would be 6 sprinkler heads max. (a small rectangle - four 90 degree heads and two 180 degree heads) My question is can I pull the water off of a 1/2 copper hose bib line? Would that allow enough pressure to run 6 normal sprinkler heads? If not it's a long run to the front yard to get to the main line.