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. Slip the longer section over the drain hose. Cut the smaller section to use as a fastener. Be sure to knot the fastener tightly to secure the "lint trap" to the drain hose.
I used my old kneehigh stockings for lint traps, I just slipped it over the washing machine drain hose and secured it tightly with rubber bands. Never had drain clogs and it was free!