Any plumber who has installed a toilet flange with a knockout, also known as a TKO flange, knows it can be difficult to remove in one piece. We also do HVAC work, so one day I drilled a 1-in. sheet metal screw into the center of the flange. I then wrapped a 12-in. to 18-in. piece of mechanics wire around the screw. I wrapped the wire around one hand, cut out the flange and removed it with no difficulties.
– Eric Farley Hillard’s Plumbing, Heating & Cooling
Danville, Ill.