I want to add a drip zone with 50 +/- emitters at 0.5 GPH to my irrgation system. My rain bird clock has an unused connection and I have a 1 inch stubout in the main line to attach a valve to. The system does have a RPZ back flow valve. Just what do I want to get to connect water line to the 1/2" distribution line with the emitters in it? Thanks