Regulations regarding pipes through external walls

[centralheatking]

This is a specific question. We all know that gas supply MUST be sleeved when passing thro walls esp external brick block etc. Boiler flues are ok because the outside air always is around the outside
of the nasty gas output.
Now what is the situation regarding
1. Condensate outflow ...as it is regarded as part of the flue ? should it also be sleeved ?
2. The blow off terminal from the prv on a sealed system ...must this be sleeved as well ?

My books are a bit outdated so maybe you fellas can update me please ...have a good weekend
Rob Foster aka centralheatking....

 

[Scott_D]

Overflow for condensate should be upsized before it goes outside
I don’t believe there any regs to say it must then be sleeved
Or that 15mm copper for a PRV or outside tap must be sleeved

 

[Burger]

Probably good practice to sleeve copper from prv from any system, copper is supposed to be attacked or can suffer from building movement. Agree with @scott_d with regards the condense pipe.

 

[centralheatking]

Probably good practice to sleeve copper from prv from any system, copper is supposed to be attacked or can suffer from building movement. Agree with @scott_d with regards the condense pipe.

Great advice thank you...cbw1982 I thought it is a grey area
re the blow off ...regards centralheatking