Apollo 1 in. x 1 in. Insert Blue Twister Polypropylene x 1/2 in. - 3/4 in. Dual Threaded Reducing 90 Degree Side Outlet Elbow ABTSE111234 - The Home Depot
Liaeyis 3-Way 1/2 inch PVC Pipe Fitting, 20PCS Elbow Fitting for Build PVC Furniture,Grade SCH40 PVC Elbow Side Outlet Tees,1/2" PVC Corner Elbow Fitting for Greenhouse Frame Tent Connections - Amazon.com
ANPTGHT 1-1/2“ Tee PVC Fitting 4 Way Elbow Connector, Furniture Grade 90 Degree Elbow Side Outlet, PVC Corner Fittings for Building Furniture Greenhouse Shed Pipe Fittings Tent Connection(Pack of 8) - Amazon.com