The Rocky Mountain Goods 1-1/2” x 1-1/4” Flexible Pipe Coupling is the go-to solution for connecting pipes of different sizes — especially in tight, under-sink spaces. Whether you're installing a new P-trap or retrofitting older drain lines, this coupling makes the job fast and frustration-free. Built from durable flexible PVC and secured with dual stainless steel clamps, it provides a tight, secure seal without glue, solder, or specialized tools. It's designed to join 1-1/2” and 1-1/4” pipes made of PVC, ABS, cast iron, or galvanized steel. Perfect for bathrooms, kitchens, laundry rooms, and utility sinks, this no-hub coupling is a must-have for DIYers and pros alike.