In article , jon
writes

The Corgi plumber has used a compression with no tape, is this
acceptable? Should I redo the job myself using a soldered joint, or should I
just loosen the compression and wrap some yellow tape, or has he done an
acceptable job?

Compression joints do not require tape or any other sealant to make a
good joint, this is true for both water and gas.
--
fred
Plusnet - I hope you like vanilla