My washing machine has a clog in the output where the water goes into the wall. Can you use Draino in this pipe to unclog it? I tried baking soda and vinegar, twice, and it didn't help. Thanks.

I'm no fan of putting harsh chemicals in your drainage system. Snaking a blockage is the only sure way to clear a clog. You may snale from the washer stand pipe or go down the washer roof vent. Good luck, tom