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I'm always reluctant to comment in this thread, however a lot of the heating/ gas advice given here is wrong. Sealing that gas pipe with silicone is potentially dangerous. As ever, the gas regs cover this.
@.Rodders
sacredhart-
I never said seal the gas pipe though did I so it’s not wrong advice. Once side of the sleeve should be sealed with no setting mastic which I imagine it already is. The gaping hole is around the outside of the sleeve.
Please refer me to where in the gas regs it says that silicon is dangerous on a gas pipe and how what I’ve said is wrong. More chance if he use concrete on that it could corrode the gas pipe.
I have attached an image from part one of the book in regards to you sound like you don’t know what your talking about. It even mentions silicon for fixing the sleeve to the building 😂
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Thanks - will have a look. its already sealed from the inside just want to provide a further seal on the outside to the plastic sleeve
konastab01
.Rodders
Silicon or something like that. Its just a gas pipe sleeved to go through a wall.