Description Oversize Kitchen Sink Drain So, you bought an antique sideboard sink, had it refinished, built your kitchen around it, and the plumber says “There’s no drain that fits this sink”. We have a solution! We are machining a ring and backing plate that our regular kitchen sink drain will sit into, but gives you a OD of 5 1/2”. The ring “floats” so all you have to do is seal it with a bit of plumber’s putty when installing. Supplied with complete drain and 4” long tailpiece. Maximum thickness of sink is 3/4″ Note, does not fit “United States Sanitaryware” or “US” Kitchen sinks
