Gas Fires fitted after back boiler removal.

[Danv44444]

Hi Guys,

Have any of you fitted gas fires after removing a back boiler. Im not quite sure about this? The customer has an inset fire to be installed.
He has cemented the holes where the old flow and return pipes used to come through.
The fire surround had a horse shoe shapped opening but the fire that he wants fitted is square shaped so hes modified the fire surround to suit the new fire.
Does the original flue liner for the old back boiler need to be replaced or can it be re used if tested and is ok?

Sorry if thats all a bit long winded, but im sure someone must have come up against this before.

Any advice would be much appreciated.

 

[SilentMike]

you have to inspect the liner along it's whole length and guarantee it for the life of the new appliance which you can't. so yea a new liner

 

[dancinplumba]

or remove liner and test flue, maybe ok, liner used because it was a bbu

 

[REDSAW]

agreed, and why cant you test the flues length?

 

[Blake]

Wait til Santa drops down the chimney and then ask him he the liner looked OK on the way down.

 

[SilentMike]

you can but would you pull it out and put it back in?, and i ment gaurantee it if its been on a backboiler for years

 

[REDSAW]

just wondering if it could be done with my new inspection camera?

 

[Leo21]

You big kid. It's an interesting point though.

 

[Danv44444]

Thanks everyone. So basically a new liner must be fitted first or remove the liner and flow test the chimney?

 

[Leo21]

Yep. Iff the flue liners renewed you'll need a flue box.

 

[dancinplumba]

Thanks everyone. So basically a new liner must be fitted first or remove the liner and flow test the chimney?

yep thats it

 

[dancinplumba]

Yep. Iff the flue liners renewed you'll need a flue box.

flue box not required

 

[Danv44444]

This might sound stupid but I've never installed a flue liner before. When you buy a flue liner do you get something with it to seal it at the bottom of the chimney just above the fire? I mean so the fumes don't just go up the side of liner and not up the liner?

Is that why you need a flue box?

 

[Leo21]

flue box not required

How do you seal it then, as question above.

 

[dancinplumba]

quoted by gas man

Re: flue liner
i sometimes use this


Support Assemblies

Part No. Description Unit Price Qty
12026 100 mm - ( approx 132 mm i.d. ) £21.71
12027 125 mm - ( approx 158 mm i.d. ) £22.96
12028 150 mm - ( approx 178 mm i.d. ) £24.65
from bes with pillars bricked up the sides,so your creating a stone chamber

 

[dancinplumba]

or you can pack it with rockwool but you have to make sure it wont fall down

 

[Leo21]

quoted by gas man

Re: flue liner
i sometimes use this


Support Assemblies

Part No. Description Unit Price Qty
12026 100 mm - ( approx 132 mm i.d. ) £21.71
12027 125 mm - ( approx 158 mm i.d. ) £22.96
12028 150 mm - ( approx 178 mm i.d. ) £24.65
from bes with pillars bricked up the sides,so your creating a stone chamber

Fair one, wouldn't it be simpler to use a flue box though.

 

[dancinplumba]

up to you i guess

 

[Danv44444]

Could be difficult to make sure I won't fall down though

 

[REDSAW]

only used alloy plate to copex with rockwool! screwed up then alloy plate sides and back screwed in £20/?

 

[tamz]

Depending on the age of the building i'd consider pulling it out and doing it without a liner.
Depends on your experience.