Blu-Lock is the next generation， cleanest， fastest and most reliable way to install and maintain an environmentally-friendly， professional-grade sprinkler system. With the revolutionary "push-and-go" design， simply insert Blu-Lock sprinkler pipe into fitting to create a secure and leak-free connection. No Clamping， No Gluing， No Waiting. For outdoor irrigation use with cold water. *Find the MPT ELBOW 3/4 X 1/2 at Ace.