Hello, I don’t really know anything about plumbing so not sure if anything I’m describing makes sense. I’ve just got a new freestanding bath delivered and it’s currently in the bathroom sitting on top of 2 planks of wood waiting to have the waste connected. I’ve got a 40mm compression elbow sticking out the floor for the waste. The bath is pre installed with a slim profile trap and flexi waste. Only problem is the end of this flexi waste is too small for the compression fitting and slips out. It claims to be a 40mm pipe but measure at around 38-39mm. I think it might be a European waste. Any idea how I connect the 2? The bath company are not helpful and suggest I use a hepvo valve which I bought but doesn’t seem to work at all and doesn’t connect between the 2. Completely lost. Is there a reducer or adapter so I can get a 40mm compression to work with a 38mm waste? I can send photos or details of the bath and waste if it helps. Thanks!