On 5/4/2016 8:32 AM, Andrew Gabriel wrote:
In article ,
Tim+ writes:
wrote:
On Wednesday, 4 May 2016 03:04:57 UTC+1, John Rumm wrote:
Gas pipe sizing needs to be worked out for each installation normally,
although there are various rules of thumb that the less clued up fitters
will use in place of doing the actual sums.

"The boiler's got a 15mm inlet so a 15mm pipe will be okay, regardless of kW or length"

It's not clear whether you're quoting a "less clued up fitter" or
contradicting John.

But just to be clear, it's not true.

+1


My Keston has a 15mm gas inlet fitting, but needs 28mm most of the
way from the gas meter due to being at other end of the house.