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Can anyone point me in the direction of some 150mm OD duct that someone like Screwfix sells.
It must be a definite 150mm OD not just sold as 150mm duct / pipe.
Part numbers will help.
I only need enough to go through the wall and cavity, not a long run.
Cheers
Sorry, link was to some 150mm aluminium ducting on Amazon. Was going to suggest screwfix as that's where I bought some 150mm last, but may/may not be in stock
A trawl through engineering shops in your location may throw up someone doing just the thing. The last time I needed a "through the wall" a local fabricators had just the thing in stainless steel, on the shelf and about £10 (1990's prices). The workshop is still there and may sell mail order to you, Needham Fabrications on 01449 723077.
What material are you looking for? Plastic, aluminium, galvanised steel?
How close to 250mm does it need to be? Ducting direct sell 224mm ducting which will likely leave 1cm right round a 250mm hole. I thinkost ducting is sold by I.D not O.D. if you only need a very short bit would a coupling work?
https://ductingdirect.co.uk/products/3m-spiral-duct?option_values=3424250790230
https://ductingdirect.co.uk/products/male-coupling?option_values=3424256786774