If you're looking to add versatility to your watering regimen, consider the 1/4" Micro-Flow Barbed Valve from DripWorks. This 1/4" water valve will make any mini-sprinkler or sprayer adjustable. Simply insert it in a 1/4" line.
You can also use these valves instead of 1/4" transfer barbs to control water flow to individual plants. A quick and simple quarter turn is all it takes to shut the valve off or turn it on.