ChrisR said:As I said, similar rules apply to water pipes.
This is a DIY forum so I donlt think giving advice on how to do gas piping is sensible. DIY'ers are unlikely to have a guage or know how to test for leaks - more to it than it might appear.
sorry I thought there was a bit of confusion going on re the compression/capillary thing and it what circumstance their use is appropriate. not my intention to muddy the water so to speak