Blu-Lock is the cleanest， fastest， most reliable way to build and maintain an environmentally-friendly， professional sprinkler system. With the revolutionary "push-and-go" design， simply insert pipe into fitting to create a secure， leak-free connection. No Clamping， No Gluing， No Waiting. Compatible with Hydro-Rain and Eco-Lock push fittings and pipe. : For non-mainline cold water outdoor irrigation connections only. Do not insert fingersFind the FPT ELBOW 1/2 at Ace.