self tap in screws and flues

[ambrosia]

how many of you put self tap in screws in all flues on new boiler installations

as far as i'm aware, vaillant are the only ones which come with the screws, but you still see so many ecotecs without the screws put in

 

[Rickster123]

Baxi and Worcester do too now. If it's in the mi then it needs screwing. I can't see anyone getting grief for screwing and clamping a flue either way tho.

 

[ShaunCorbs]

i do gets screwed 6times per joint cost about 3 for 100

 

[townfanjon]

Viessmann dont want screws

 

[ambrosia]

that i didnt know,
that said i've never installed a viessmann

 

[ShaunCorbs]

Viessmann dont want screws

yes they do says in mis atleast 3

 

[townfanjon]

What !

 

[ShaunCorbs]

What !

for all models and lengths

 

[Rickster123]

What !

Dear mr gas safe inspector...

 

[ShaunCorbs]

Dear mr gas safe inspector...

+1 and gas safe require screws at-least 2 per joint

 

[ambrosia]

+1 and gas safe require screws at-least 2 per joint

is it actually a gas reg, just looking at an old thread, theyre convinced that theres no mention outside mi's about it

http://www.ukplumbersforums.co.uk/g...m-public-forum/22969-self-tappers-flue-2.html

 

[townfanjon]

Sorry guys , viessmann DO NOT require screws , the boiler shaun has just posted is not a boiler i have seen , their domestic boiler is a WB 1 C , the 200 's dont need them either, if you dont believe me ring their technical on monday morning.

 

[Rickster123]

Sorry guys , viessmann DO NOT require screws , the boiler shaun has just posted is not a boiler i have seen , their domestic boiler is a WB 1 C , the 200 's dont need them either, if you dont believe me ring their technical on monday morning.

Fancy a pint now don't ya?!

 

[ShaunCorbs]

Sorry guys , viessmann DO NOT require screws , the boiler shaun has just posted is not a boiler i have seen , their domestic boiler is a WB 1 C , the 200 's dont need them either, if you dont believe me ring their technical on monday morning.

they do that covers
vitodens 100-W WB1 Series,
citodens 200-W WB2 Series,
Vitodens 200-W B2HA/ B2HB Series and
Vitodens 222-F B2TA/ B2TB Series
(with preinstalled coaxial vent pipe adaptor

and another point gas safe will fail any installation of any flue without screws or support

 

[townfanjon]

Their flue elbows come with 2 small little holes where you can see if the flue is starting to come apart.
Personally I would prefer them to be screwed , but as I say ring em if you dont believe me .

 

[townfanjon]

Fancy a pint now don't ya?!

Off shortly lol, off to a poxy race night , dont even want to go. Rather stop in and go watch match of the day lol .

 

[ShaunCorbs]

Their flue elbows come with 2 small little holes where you can see if the flue is starting to come apart.
Personally I would prefer them to be screwed , but as I say ring em if you dont believe me .

fail enough

question from gas safe what stops them from coming apart theres no glue no fixings : nothing and they will right you up on it

 

[townfanjon]

Manufacturers rule ok lol

 

[ShaunCorbs]

Manufacturers rule ok lol

not gas safe and they will fail you on it and my mis state different

[DLMURL]http://www.viessmann.co.uk/content/dam/internet_uk/images/products/vertical_flue_installationmanual.PDF[/DLMURL]

 

[lame plumber]

screw all mine as I have seen too many in bits!

 

[townfanjon]

The end lol

 

[ambrosia]

where is that extract from

 

[townfanjon]

Its an email from viessmann to one of their installers.

 

[ShaunCorbs]

Its an email from viessmann to one of their installers.

The only problem with expansion is over long lengths same as copper, and on anther point there's no internal expansion joint on the flue anyway eg no extra space once the flue in inserted to td (fully to stops) so it's going to expand over the length not internally

and what stops the flue expanding out of its socket like gutters on a warm day eg working loose over time

 

[jonnyswamp]

Screw all mine, use self cutting screws from screwfix, literally a couple of seconds and its done
Easydrive Self-Drilling Low Profile Pan Head Screws 4.8 x 16mm Pk200 | Self Drilling Screws | NoLinkingToThis