Thanks
But it used to be sold as a part of the tub because the appeal of the tub was to enable you to have the ability to use a suds saver in a much smaller space, admittedly not such a draw today. I was in a plumbing supply store maybe 20 years ago when a young woman appeared with this part that came with the sink that had just been installed, wondering what it did, saying that she did not need it and could she return it for a refund. Her attitude caused the service counter to freeze over like those scenes in Day After Tomorrow as they thought of where she could install it.