Outside tap soldering

[JM1234]

Hi all, keen DIYer here. Installing an outside tap and have tried soldering the joints leading from the 15mm copper pipe to the mains pipe. My question is a bit random but as I was soldering, the copper pipe going through the wall obviously got very hot, and got me thinking, could the heat conducted create a fire within the cavity wall? Something I hadn't considered and got me a bit concerned.

 

[fowlerboi]

Nah I doubt the heat would. I'm always careful about naked flames going inwards where the hole is but I expect it would be incredibly hard to do on a masonry wall.

 

[JM1234]

Nah I doubt the heat would. I'm always careful about naked flames going inwards where the hole is but I expect it would be incredibly hard to do on a masonry wall.

Thanks Fowler. I was concerned about the insulation as well as masonry, but from what I’ve read I think insulation is generally designed to be fire retardant

 

[JM1234]

Ended up finishing the job with compression joints anyway. All nice and squeaky tight and I haven’t noticed leaking. Does anyone know if compression joints can just fail, or given the fact there’s no leaking am I safe to leave the water on?