Patio Misting: How to Flush the Line and Check for Leaks
Before you install the last nozzle, run water through the line. This pushes out plastic shavings and debris that could clog stainless nozzles.
Then add the final nozzle and turn the system on. Walk the line and look at each coupler and fitting for drips.
If a joint weeps, check the O-ring; extra O-rings come in the kit.