Drayton Compression Equal 90° TRV Adaptor Elbow 15mm (6165R)

The 15mm Compression elbow is Not a push fit, the spigot end goes into the valve body and the nut and olive end goes to your pipework.

part no 07 05 183 come with two push fit 10mm elbows.

15mm compression elbow 07 05 905 15 mm push fit elbow 07 05 905

Providing you use the manufactures pipe inserts Yes

With a plastic pipe use an insert into the end of the pipe and push fully home into the end of the push fit elbowwith the white plastic, the other end use the olive and tighten up to the radiator tail. with a copper pipe the same applies ( without any insert )