1-1/2 inch schedule 40 PVC pipe threaded coupling from China Manufacturer - Taizhou Zhuoxin Plastics Co., Ltd.
Amazon.com: FangKingNo 2pcs 2Inch White 2-Way PVC Male Adapter Pipe Fittings (Slip to Male Thread) Coupling with 2-Inch Male Hose Thread Schedule 40 -2 Pack (2") : Industrial & Scientific