Lee,

See post #5. My reason for wanting to change the fittings was that I couldn't get the original fittings to clamp down over the pipe (8mm OD 6mm ID). As I have many metres of this pipe, I didn't want to buy any more of a different size. I would have liked M8 male to 8mm push in, but couldn't find it directly. I have the brass, taps and dies to make an adapter, but couldn't be arsed to, when they were available to buy.

Rob