I am refitting my bathroom and am trying to change the toilet. I have bought a new pan connector but thr plastic fins will not fit in the old metal stench pipe. The old pipe is just under 4" in diameter and the other end will not go in what so ever! The old connector appears to have an adapter to make it smaller, is this what i need. It also was siliconed in place. Have i just answered my own question!
Thanks in advance