nope i cant remember a tenth of the regs, changes and ammendments.
for that reason, i have a box in van full of reference paperwork, my own little bible colection for covering myself on the gas regs. if i have any doubts, then i open my bibles (most days)
today for example i A.R. a gas meter, i just looked at the rusty meter, call national grid who arrived within 4 hrs. they decided to I.D. the instalation, but decide not to disconnect it!
now using my interpretation of my bibles, i decide to remove regulator and cap off 2" incoming e.c.v.
we cant expect to remember every reg or every calculation you have to make. we are expected to know wher to find the information we need.
as for the originally posted question, if it was posted by a registered installer, i didnt believe it was by the shear nature of question! i would of popped out to van, pulled out me books, and provided the answer he reqd.
im here to help people how i feel is best, in this case my personal opinion is my above reply.
if i feel i cant help with a post, i dont answer them.
when i need help i ask for it
good luck
shaun