OK having an issue and yooper and I tried to figure it out but....... I need to install a sprinkler system in a rental house. The WHOLE house is 1/2 copper EVERYWHERE. There is not even a way to turn off the wtr to the house except for the meter pit outside. I need to know how many GPM I can get through the 1/2 copper. I can turn it into 1" about 2 ft before the PVB. The yard is small so I can put MPR's in the front, but will need 5004's in the back. I know the "proper" way to do this would be to tie in right after the meter with another meter pit in the yard but I am trying to avoid this if at all possible. Any help would be appreciated.