Amazon.com: Carvedexquisitely 3 Way Tee PVC Fittings, 3/4-inch PVC Furniture Grade Fittings, Tent PVC Connectors and Greenhouse Pipe Fittings(4 packs) : Patio, Lawn & Garden
NIBCO 4 in. x 4 in. x 1-1/2 in. PVC DWV All Hub Sanitary Reducing Tee Fitting C4811HD44112 - The Home Depot
Amazon.com: Rainbow Dream 4-Way 1 Inch PVC Elbow Corner Tee Fittings - Build Heavy Duty Furniture Grade for 1 inch PVC Pipe - 8 Pack, White : Industrial & Scientific