Amazon.com: FangKingNo5pcs 1.25Inch White PVC Pipe Coupling Adapter Pipe Fittings couplers (Slip to Slip) Schedule 40 Easy to Install,and High Tensile for Home or Industrial Use (Pack of 5) (1 1/4") :
Various Fitting Mfrs. - 304 Stainless Steel Reducing Coupling 2" x 1.25" #SSLRC2012
Charlotte Pipe 1-1/2 in. PVC Schedule 40 S x S Coupling PVC021001400HD - The Home Depot
Boshart Industries, Inc. (BII) - BII CSS-125 Stainless Steel Insert Coupling 1.25" INS x 1.25" INS #IRTSSCG125
1 1/4” 1.25" OD to 1 5/8” 1.625" OD Exhaust Component to Pipe Adapter – Bear River Converters
Amazon.com: FangKingNo 5pcs 1.25Inch White 2-Way PVC Male Adapter Pipe Fittings (Slip to Male Thread) Coupling with 1.25-Inch Male Thread Schedule 40 -5 Pack (1 1/4") : Industrial & Scientific
PVC 1/2" 3/4" 1" 1.25" 1.5" 2" 2.5" 3" 4" Thread Connector 20mm to 110 mm PVC Water Pipe Adapter Garden Irrigation Tube Fittings