Charlotte Pipe 4"x3" DWV Schedule 30 Adapter Coupling. This PVC coupling is designed for non-potable water and has a maximum working temperature of 140 degrees Fahrenheit. It is easy to install and comes with a 5-year limited warranty.
WARNING: This product can expose you to chemicals including titanium dioxide and carbon black which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov