Hello all I need some advice, an old brass stop tap failed on an old water pipe I assumed the pipe was 32mm so I tried to put a reducer coupler on 32mm-20mm I could then put an end cap on but this old black pipe is a weird size it's to small for 32mm mdpe fitting and to large for 25mm and I don't know what I'm going to do the pipe measurements with a vernier callipers measurements tool is 30mm outer and 20mm inner and I need a fitting that will convert it to 20mm blue pipe. Thank you all in advance.