-
I mean your reply is very different too, theres some common sense here and from the picture there hole surround the sleeve is gaping. Yet you said the information is incorrect, it seems common sense might be not that common.
konastab01-
What’s the principle here? You can’t seal around both ends of a bare pipe through a wall because if the pipe leaks you get a buildup of gas in the void? But you can seal both ends of a sleeve on a pipe to the wall? Or just one end?
-
I completely disagree. With gas you don't want to rely on common sense or interpretation. You want clearly written rules.
You first answer was wrong as you advised a DIYer to seal the pipe with silicone, ommiting to mention the important part about venting to outside. This is particularly relevant in the above photo as the sleeve does not extend beyond the face of the wall so a DIY attempt to seal based on your initial advice would certainly seal the sleeve.
You are also wrong the sleeve is just there to prevent gas escape into a void. If you were familiar with / had read the regs you posted above you will note the sleeve is also there to protect the pipework from movement in the wall.
Sharkstar
sacredhart
Is a very different answer to your second post on the subject.