Hello, I have a question and need some help. There is a drain in my garage floor that I want to plug with one of those rubber plugs that expands when you twist the nut on the top but I cant find one that fits. The pipe is 3 3/4" ID round and I can only find 4" and 3" and neither will fit. What can I use that will fit? Also what is the name of the plug.
Thanks,
Chad
Thanks,
Chad