Use a glue on Snap Tee
Toro makes (a bit on the expensive side)
My local Ace Hardware sells & my local Home Depot used to carry.
Available on ebay too.
They work fine downstream of the sprinkler valve (in the "zone"
I've never used them on the supply side.
Glue them on, wait a couple hours, drill them out.
Be careful to not drill through the back side of the pipe...... I use
drill a spacer.
My lowes has the snap on T's. They're a breeze to do and you don't
have to dig up anything but where you are going to add the
connection. I've used them a couple times with no issues.
I take the last sprinkler head of for a few minutes to flush the
plastic remnants after drilling.
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