3/4 olives used in 22mm compression on imperial pipe...

[WaterTight]

What size olives do I need - presuming I do exactly the same (???) - to use 28mm compression?

 

[WaterTight]

I know I could have said what's the next imperial size up in pipe but I also want to check if it's the same principle for every pipe size up in size excluding 15mm or whether some aren't...

 

[Ermintrude]

1" you can sometimes persuade a 28mm nut and olive on.