My kitchen mixer tap has flexi tails with the small double o-ring into the monoblock, and on the other end not compression connectors, but the same fitting as a tap connector - a female with a large rubber mating flange inside.
It seems to be recommended to use one side of a compression coupler screwed into the female connector, but that seems a bit dodgy to me as the end of the compression coupler is not designed to be a mating face, and tapers to quite a narrow face which could cut into the rubber rather than seal against it.
When such a female connector is used to connect to an actual tap, the bottom of the tap does not taper and so that seems perfectly reasonable.
Is there a better way to connect a "tap connecter" on the non-tap end to 15mm copper ?
Simon.