LASCO 2-in x 1-1/2-in Adapter PVC Adapter in the PVC Pipe & Fittings department at Lowes.com
Nickson 2 1/2in I.D. x 2in O.D. Adapter
Reese Towpower Towing Receiver Reducer Adapter for Class V, Reduce from 2-1/ 2 in. to 2 in., 7028733 at Tractor Supply Co.
DC 12V 2 Amp Power Adapter
NIBCO 1-1/2 in. x 1-1/4 in. PVC DWV Hub x Slip-Joint Trap Adapter C48017HD112114 - The Home Depot
HOME-FLEX 1/2 in. CSST x 1/2 in. MIPT Brass Male Adapter 11-436-005 - The Home Depot
Exhaust Adapter: 2 1/2" Inside Diameter, 3" Outside Diameter, 4" Long 548583: Advance Auto Parts
PROFLO® 1-1/2 in. Slip x Male DWV Trap Brass Adapter - 2020 - Ferguson
M14 Female To 1/2 Inch 1/4 Inch M10*1 Male Pressure Gauge Fittings,m20 Female To 1/2 Inch 1/4 Inch Male Pressure Gauge Adapter - Pipe Fittings - AliExpress