"John Stumbles" wrote in message
news
On Fri, 02 Jun 2006 15:18:36 +0100, Doctor Drivel wrote:

It is standard practice to have the boiler gas supply dedicated to the
boiler only and no tee offs.

What 'standard' is that, then?

De-facto standard. I know no one who know his stuff not to have a dedicated
gas supply directly back to the meter. Many of the old area Gas Boards
would not have it any other way. Now the privateers are in charge anything
goes.

In the UK the current standard is BS6891:2005 "Installation of low
pressure gas pipework ... in domestic premises". Appendix A of this
standards document explicitly shows how to size pipe to supply multiple
appliances _with_ tee offs.

Read what I wrote and take note. If you want no problems at all have a
dedicated supply.