towel

"Our air conditioner was leaking through this pipe and flooding our laundry room and hallway. My husband's fix was to put a funnel under it, running onto a curtain rod, that then ran to a floor drain, with a towel under for added protection. In his defense, it worked beautifully."

Yup, he's a keeper!

Though it's considerably less sanitary.

Submitter TurboJens explains this fix: The fill valve split in half and the floater does not cut off the water supply. The towel keeps the water inside and the wrench keeps it from overflowing.