I'm trying to retrofit my sprinkler system with a drip irrigation setup. I would like to do targeted watering of specific plants on our patio without spraying water everywhere. The existing system had 1/2 inch risers with the sprayer heads on top. I purchased a number of parts from Sprinkler Warehouse including retrofit pressure regulators for each riser, emitter manifolds, RainBird emitters, tubing, etc. Everything appears to be working but I've run into a couple of issues and need suggestions ...