If anyone is wanting to know the socket for a standard boler
sink is 1 3/8 inches and I managed to so far remove one of the two nuts holding it in with this socket that I bought from princess auto. The other side of the faucet has a pipe (unsure what material) extending down that needs to be cut first so I'm either going to cut it with a pipe cutter or use my dremel with a blade attachment as its still a very tight space. I did not need to remove the sink to remove it as in my case I took my fridge
out to work on the underside.