New Fire, Flue / Chimney liner Question.

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I'm not exactly sure which is the Flue, so please don't laugh. I'm having a Stove style gas fire fitted. The big pipe that comes out the back and goes up is 135mm Dia. (Is this the flue?).
The shiny flexible pipe that comes down the chimney (is this the flue, or is it the chimney liner?) is smaller. Does this mean that this will fit inside the other , or is it meant to be bigger so that it fits over the top? Or.. are they mean to be the same size? Does it matter?

A real live gas fitter is fitting it, I just want to be prepared in case there is a problem, or more cost.
 
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a chimney is a flue, the shiny flexible thing is a liner. i hope the gas fitter is both real and live otherwise he will be a long time.

does he have the qualifications and experience to do the job? was he recommended and have you checked him out with gassafe? :D ;)
 
As a rule of thumb you dont reduce a flue dia as it comes off of an appliance

so if your appliance is 135mm any liner should be the same or bigger.

it will tell you in the instasllation instructions.
 
I'm having a Stove style gas fire fitted. The big pipe that comes out the back and goes up is 135mm Dia. (Is this the flue?).
The shiny flexible pipe that comes down the chimney (is this the flue, or is it the chimney liner?) is smaller. Does this mean that this will fit inside the other , or is it meant to be bigger so that it fits over the top? Or.. are they mean to be the same size? Does it matter?

What make is the stove? You can not normally reduce the outlet diameter, as per Gb.

In any case, you CAN NOT reuse the liner, unless you are confident that it will last the life of the new appliance. Which you can't , without knowing it is very new, or have had it visually inspected.

I assume you bought the stove on line.
 
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A proper adaptor will be req to join the 2 flues and will prob have to be ordered as most merchants dont stock a lot of open flue stuff any more
 
Thanks for the replies. It seems I will have to have a new, larger liner fitted. The real live engineer is highly recommended, fully qualified and gas safe!
He removed old fire but hasn't seen new one yet.

I'm prepared for his 'you need a new flue' routine now, thanks.
 
By the way, just wondering..

Can the new liner be attached to the old one, and pulled down (or up) the chimney for easy fitting? Do gas fitters do this, or is it a specialised job?

Chimney is straight and short. House is a bit like a bungalow, so there is nothing above the room where the fire is going, just the roof.
 
Can the new liner be attached to the old one, and pulled down (or up) the chimney for easy fitting?

No, just pull up and out old one, and push down new.

Do gas fitters do this, or is it a specialised job?
Gs fitter will do it

Chimney is straight and short. House is a bit like a bungalow, so there is nothing above the room where the fire is going, just the roof.[/quote]

HOW short? There is a minimum flue height, which will be detailed in the MI's
 

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