A washing machine repairman told me to put a pantyhose leg on the pipe that drains into our slop sink. I was surprised to see how much lint it caught. All that lint would eventually clog our drain, and plumbers are expensive! I also have a mesh filter in the drain itself.
I use the good leg from a ripped pair of pantyhose. I also go to garage sales and buy pantyhose for a good price, so I always have some on hand.
Source: Washing machine repairman
This page contains the following solutions.
Prevent lint from clogging a washtub drain when the clothes washing machine drains into it by covering the drain hose with old pantyhose. Just cut off a 5 inch section of leg from the pantyhose and a 1 inch section.