Cooker hood

[Alwayslearning22]

Hi folks, 

 

my new home has a 120mm flexi duct connected to cooker hood that needs connected to a 100mm rigid pipe coming out of the ceiling. 
it was taped with airtight tape by kitchen fitters but it’s fallen off. 
 

what’s the correct way to fix this so it’s airtight? 
 

thanks 

[Nickfromwales]

https://www.screwfix.com/p/manrose-round-central-reducer-white-125-100mm/10684

 

You can buy duct tape, or get the large jubilee clips.

 

https://www.amazon.co.uk/Kair-Metal-Hose-Clip-125mm/dp/B07ZPGVH4L/ref=asc_df_B07ZPGVH4L?tag=bingshoppinga-21&linkCode=df0&hvadid=79989677905430&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=42064&hvtargid=pla-4583589145554366&msclkid=eb0a5ca7b18819f05a0835004d2084ce&th=1

[Alwayslearning22]

Than

6 hours ago, Nickfromwales said:

https://www.screwfix.com/p/manrose-round-central-reducer-white-125-100mm/10684

 

You can buy duct tape, or get the large jubilee clips.

 

https://www.amazon.co.uk/Kair-Metal-Hose-Clip-125mm/dp/B07ZPGVH4L/ref=asc_df_B07ZPGVH4L?tag=bingshoppinga-21&linkCode=df0&hvadid=79989677905430&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=42064&hvtargid=pla-4583589145554366&msclkid=eb0a5ca7b18819f05a0835004d2084ce&th=1

thanks Nick. 
 

Do I secure the reducer with screws? Or a glue of some sort? 

[Nickfromwales]

Just now, Alwayslearning22 said:

Than

thanks Nick. 
 

Do I secure the reducer with screws? Or a glue of some sort? 

Usually just proper duct tape, much as that may feel to be a bodge it isn't.

 

Some duct will require a female adaptor, so the duct can slide inside, and others vice-versa, so you'll need to get exact sizes and compare the products internal and external dimensions to be sure Jack will fit into Jill.

[Alwayslearning22]

On 04/03/2026 at 16:37, Nickfromwales said:

Usually just proper duct tape, much as that may feel to be a bodge it isn't.

 

Some duct will require a female adaptor, so the duct can slide inside, and others vice-versa, so you'll need to get exact sizes and compare the products internal and external dimensions to be sure Jack will fit into Jill.

 

would diall silver foil tape from screwfix do the job? 

[Nickfromwales]

33 minutes ago, Alwayslearning22 said:

 

would diall silver foil tape from screwfix do the job? 

As long as its anti-tear, yes.

 

This is better stuff, and can be delivered. 

 

https://www.tlc-direct.co.uk/Products/BG10T.html?source=adwords&ad_position=&ad_id=&placement=&kw=&network=x&matchtype=&ad_type=pla&product_id=BG10T&product_partition_id=&campaign=shopping_excluded&version=finalurl_v3&gad_source=1&gad_campaignid=17412537060&gbraid=0AAAAAD-6GhlJa-VEmBUZA3QiMsZIdbAub&gclid=Cj0KCQiAk6rNBhCxARIsAN5mQLsb5uQjxT58j8lVt6RN3m5ce5vT9k99qOyPwbiZavHMyGxo9IJ4eRsaAiHjEALw_wcB