On 6/23/2016 1:17 PM, Don Y wrote:
Here, most homes feed their irrigation system off of the household water
supply -- a 3/4" line from the meter to the house then, typically, 1/2"
pipe feeding the hose bibbs on the periphery of the house.

N.B. Most homes, here, don't have big irrigation loads and rely on
*drip* irrigation -- much lower overall flow rates than "lawn sprinklers"
that throw lots of water into the air (40% of which evaporates).