Five things to consider when designing a drip system. 1. What type of water are you using? 2. What is your point of connection (POC) to the water? 3. What area(s) do you want to water? 4. What is your flow rate and pressure. 5. What will you be watering? Check out http://www.dripworks.com/category/free-drip-planning-guide to learn more.