90 Degree Bend on Flue

tommyh1977

Hi, I am almost certain regs prohibit 90 degree bends on flue outlet's from a solid Fuel stove, however is a swept 90 degree with access door allowed as this is similar to using 2 45 degrees?. Pic attached.

Robbie.G

tommyh1977 wrote: »

Hi, I am almost certain regs prohibit 90 degree bends on flue outlet's from a solid Fuel stove, however is a swept 90 degree with access door allowed as this is similar to using 2 45 degrees?. Pic attached.

90 degree bends are not allowed.Where did you intend on using it.There are alternatives

gud

why would a 90 degree bend be prohibited? i had one installed on my stove by registered installer... is this wrong??

tommyh1977

Robbie.G wrote: »

90 degree bends are not allowed.Where did you intend on using it.There are alternatives

Directly off rear outlet on stove to change direction to vertical vitreous pipe.

Robbie.G

tommyh1977 wrote: »

Directly off rear outlet on stove to change direction to vertical vitreous pipe.

The right fitting to use off the back connection is a tee with a soot collection point

Robbie.G

gud wrote: »

why would a 90 degree bend be prohibited? i had one installed on my stove by registered installer... is this wrong??[/
Quote]
90degree bends are not allowed on solid fuel appliances a 90 is permissible on wood burning stoves only.A stove is either multifuel or woodburning

gud

I presume this is because soot may come down the chimney and lodge in the 90 degree bend?? makes sence when I say it. Mine is a mutifuel stove.

Is it true that burning cans i.e coke cans etc in the stove is good for the chimney or is that just a myth?

Robbie.G

gud wrote: »

I presume this is because soot may come down the chimney and lodge in the 90 degree bend?? makes sence when I say it. Mine is a mutifuel stove.

Is it true that burning cans i.e coke cans etc in the stove is good for the chimney or is that just a myth?

That's why 90 arnt allowed it against building reg.
Don't burn the likes of cans,plastic etc if your chimney is lined it will wreck it.

tommyh1977

Hi all, I emailed MI Flues, who make that particular bend with access door. Got reply today stating once no other horizontal pipe is used to connect bend to stove, the bend can be connected directly to stove and is not against building regs............................................interesting!!!!

Robbie.G

Direction - Flues should be vertical wherever possible and where a bend is necessary, it should not make an angle of more than 37.5° with the vertical. Horizontal flue runs should be avoided except in the case of a back outlet appliance, when the length of the horizontal section should not exceed 150 mm.
Flue Pipes
2.6 A flue pipe should only be used to connect an appliance to a chimney and should not pass through any roof space.
2.7 Flue pipes may be of any of the following materials:
(a) cast iron as described in BS 41: 1973 (1981), or
(b) mild steel with a wall thickness of at least 3 mm, or
(c) stainless steel with a wall thickness of at least 1 mm and as described in BS 1449: Part 2: 1983 Specification for stainless and heat resisting steel plate, sheet and strip, for Grade 316 S11, 316 S13, 316 S16, 316 S31, 316 S33, or the equivalent Euronorm 88-71 designation, or
(d) vitreous enamelled steel complying with BS 6999: 1989.
2.8 Flue pipes with spigot and socket joints should be fitted with the socket uppermost.
2.9 Shielding - Flue pipes should be separated from combustible material by at least the distances shown in Diagram

Robbie.G

Irish building regs partJ

http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,1650,en.pdf

tommyh1977

Wasn't doubting you...................had emailed them before posting on here, amazing how a manufacturer can flex the truth to get the sale.

Here is reply I received

"You can use the 90 deg bend if it is coming directly of the stove. Building regulations only allow you to go 6” at a 90 deg – this basically means that you could not go with a length of flue of the back of the stove and then turn at a 90 deg"

tommyh1977

On another note where can I source one of those Tee's, anywhere I've phoned today said they only have elbows?

ligertigon

Right price tiles stock the "T"'s you mention just got one today

shane0007

There is a difference between a 90 bend made from a 90 & a 90 bend made from 2 x 45's.