In message , Christian
McArdle writes
i would like to replace my conventional boiler with a combination boiler
has
anyone got inst instructions ?please

In order to fit gas appliances, you need to be what is described in the
legislation as a "competent person". For professional installation, this is
defined as being a member of CORGI, with, possibly an exception for BG.
However, for installations within your own home, it is permitted to DIY,
provided you can hold your head up high in a court of law and justify your
competence.

Just got into an argument with the chap in my local plumbers merchants
about this - I wanted a 1/4 inch iron plug to plug the end of the supply
pipe to gas fire I've removed.

'Is this for gas?'

'Yes'

'You have to be a member of CORGI etc.'

'Well actually you don't to DIY....'

'Oh yes you do....' and went a bit of spiel about it.

I waited to I got all my bits, before I tried to correct him, don't
think he believed me though.

Unfortunately, the level of expertise that appears to be present from the
nature of your query would indicate that the court would be unlikely to
accept that you did comply with the competence requirement,

Quite.

There is a bit in the uk.d-i-y FAQ about this.
--
Chris French, Leeds