bountyhunter
New Member
I am getting ready to put in an underground irrigation system myself and have a question on what size of pipe to use. I have thousands of feet of 1-1/4" pvc already, and would obviously like to make use of it. My sprinklers are Weathermatic T3 rotors. They have 3/4 female IPT connections on the bottom of the sprinkler. Can I use the 1-1/4" all the way to the sprinklers and then reduce right before I tie into the heads, or should I run the 1-1/4" as the mainlines and branch off of them with 3/4" poly to the heads(about 10-20' on each branch). Flow at 30psi is 9.5-10 gpm at my house. Thanks in advance.
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