examples of transition fittings

Transition fittings allow tubes of different materials to be joined.

copper to steel

The tubes are joined by a threaded tube on the steel end, and by union or compression coupling on the copper end.

copper to plastic

The tubes are joined by union or compression coupling.

steel to plastic

The tubes are joined by a threaded tube for the steel end, and by compression coupling or, for a plastic end, by gluing.