Charlotte Pipe 1-1/2 in. PVC Schedule 40 MPT x S Male Adapter PVC021091400HD - The Home Depot
Amazon.com: letsFix 1-1/2" PVC Fittings 4 Way (4-Pack), 1.5" PVC Pipe Connector PVC Elbow - Heavy Duty Furniture Grade 4 Way PVC Fittings for All DIY PVC Structure and Frames, Fits 1-1/2"
Lasco Fittings PV405015 1.5 in. Female Pipe Thread Tee - Pipe Fittings - Amazon.com
Amazon.com: (6 Pack) Cruzadel PVC Tee Fittings for Threaded Poultry Cups Chicken Waterer - Schedule 40 PVC 1/2 inch Slip X 1/2 inch Slip X 1/8 inch FPT : Patio, Lawn & Garden