1 1/4″ Stainless Steel Push And Pull Type Basin Waste
This drain has two threaded areas. Be sure to apply Teflon tape to all threaded areas to prevent leaks. If you don’t put Teflon tape on the threaded area, it will leak (just like any other sink drain).
Hand-tighten only what needs to be tightened. Don’t use any tools. Many newbies use a tool and overtighten it and then brake, and they blame the unit because it’s made of plastic. There is no problem with using plastic drain pipes if you know how to install them.