INTUMESCENT PIPE COLLAR DILEMMA

[Guest antradj]

Hi all.

Been advised by a fire safety officer to install intumescent pipe collars on the cellar side of 2 4inch plastic air vent pipes that lead from a lower ground flat through a brick wall into the lower ground cellar.

Trouble is the pipes tee off on a right angle so tight to the wall on the cellar side there is no way to get the collars on a straight section of pipe (see pic).

Do I drill out the wall round the pipes to allow space to fit the collars then patch up with sand and cement or is there any easier solutions as I am loathe to do that and definitely do not want to replace the whole vent system it all as it was newly installed albeit before I got the place.

Thanks in advance Anthony

[Tom Sutton]

You first need to clean up the plaster work then measure the size of collar, depth, diameter and rating you require, then contact the experts like Envirograf at https://envirograf.com/product/intumescent-collar/ and get their advice.

[Tridentfirepl]

FSI Ltd do a shallow neck collar that is only 25mm deep for this very application. 

[Guest antradj]

Thanks Fellas!