Hi all, Bit of a novice with piping! I had to move my washing machine, and the new location has old grey waste pipe o/d 40mm, I/d about 36mm. I'm trying to reduce this to 32mm so I can hook up my 32mm drain waste to it. I bought a 40mm-32mm reducer and it's won't fit in. Any advice as to the best thing to buy? I guess it's due to old pipes, but really not sure best bet. Cheers.