Mission RubberDTC150 MRDTC 150 Drain Trap Connector, 1-1/4-Inch or 1-1/2-Inch to 1-1/4-Inch or 1-1/2-Inch

Bought this for the bathroom sink pipe that hadn't been installed correctly and leaked every time someone washed their hands the soap and water would come swelling out of the pipe. This has helped a lot. Who ever invented this is a genius. It was easy to install and no single drip of water has leaked out.

This rubber connector was used to connect different size pipes and was effective in providing a continuum of water flow.