Namsag, you really are a muppet, If you were as you say you are a corgi engineer, why do you not understand the regulations, as a corgi registered engineer it is your duty to report any gaswork attempted by an unqualified person if you are so confident that you are correct with regards diy gas work why don't you post your corgi regisration number on this forum and all the advice you give along with doctor whomever, then if something goes wrong we can trace it back to who gave the advice to someone unqualified. I am sorry you think I cannot have an adult discussion when I discuss something with one I'll let you know.