Genova's Poly Insert Reducing Combination Elbow (INSERT x FIP) is used to change the water flow direction and reduces to a smaller tubing size. PTFE thread tape (sold separate) is recommended for threaded joints. This insert is to be used with polyethylene (PE) pipe in buried cold water applications only, such as irrigation, residential lawn sprinkler systems, water service pipe, and swimming pool installations. | Genova Poly Insert Reducing Combination Elbow (INSERT x FIP) | Size 3/4" x 1/2"