On Thu, 15 Jun 2006 08:49:44 +0100, PM wrote:


"Ed Sirett" wrote in message
news

1) Through cavity is fine but there are extra rules. See BS 6891

Through cavity yes, along length of cavity no because of gas build-up. So is
it better to avoid under floorboards if possible or is it fine as Drivel
says? I have the choice of running the pipe in the corner of the ceiling
(unsightly) or under floorboards.


A link to BS 6891 can be found under 'gas fitting standards' below.
If the under floor space is ventilated then there is no problem, this is
common practice. It is quite awkward to get the pipes under the floor in
these circumstances. Compression joints should not be used.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html
Gas Fitting Standards Docs he http://www.makewrite.demon.co.uk/GasFittingStandards