I am looking to start a project soon .
Besides turning off the water at the water meter (main line), I have another option to turn off the water at the second shut-off valve located in front of the house (a few inches off the wall). The line then goes into the house under the raised foundation.
Where do I tab the line for my sprinkler? Do I use a "Slip Joint Tee" before the second shutoff valve? If so, do I need another shut-off valve like most sprinklers installation guide suggests?