External condensate pipework.

[Scott_D]

I can’t find anything in black and white for this.
I usually go through the wall in 40mm waste and don’t insulate.
Does 40mm now need to be insulated as well as 30mm?

 

[SimonG]

I always use 40mm and dont insulate.

 

[ShaunCorbs]

40mm doesn’t but new regs say 32mm has too even in lofts

 

[Scott_D]

40mm doesn’t but new regs say 32mm has too even in lofts

Would you have a link to this info?

 

[ShaunCorbs]

The HHIC states that: ‘Where an installer is fitting a new or replacement boiler, the condensate discharge pipe should be connected to an internal ‘gravity discharge point’, such as an internal soil stack (preferred method), internal kitchen or bathroom waste pipe such as sink, basin, bath or shower waste.

External pipes from sink wastes or washing machine outlets should be:

• A minimum of 30mm internal diameter
• Insulated with waterproof UV resistant material
• Terminated below the grid but above the water line with a suitable drain/leaf guard fitted
• The end of the waste pipe should be cut at 45 degrees where it terminates into the grid to help reduce the potential for the pipe to freeze.’

 

[snowhead]

https://www.hhic.org.uk/uploads/6006FFA5C5C6A.pdf

 

[MOSSEP]

Good luck picking up 32mm UV resistant pipe lagging at most wholesalers! And good luck fitting the lagging using normal pipe clips, best make sure you are carrying some rubber lined rings and back plates

 

[ShaunCorbs]

And a massive core as it’s 82mm