Do universal roof boiler flue kits exist - suitable for fitting to any brand of boiler?

[Wuey]

To get watertight we need to finish tiling the final bit of roof where a boiler flue still needs to be fitted - we haven't apppointed a plumber yet nor decided on the boiler manufacturer, but when a plumber came to site to quote for the job he told us that we'd have to install a flue that was the same brand as the boiler.

Is there really no such thing as a generic 125mm boiler flue kit that can be installed in our roof, prior to us choosing which boiler will be going in to the house, so we can at least get watertight whilst sorting out all the plumbing decisions? 

We've looked online and can't work out why a Worcester flue wouldn't work with a Vaillant flue (for example).

Thanks in advance for any light that can be shed on this one.....

[marshian]

3 hours ago, Wuey said:

To get watertight we need to finish tiling the final bit of roof where a boiler flue still needs to be fitted - we haven't apppointed a plumber yet nor decided on the boiler manufacturer, but when a plumber came to site to quote for the job he told us that we'd have to install a flue that was the same brand as the boiler.

Is there really no such thing as a generic 125mm boiler flue kit that can be installed in our roof, prior to us choosing which boiler will be going in to the house, so we can at least get watertight whilst sorting out all the plumbing decisions? 

We've looked online and can't work out why a Worcester flue wouldn't work with a Vaillant flue (for example).

Thanks in advance for any light that can be shed on this one.....

 

Can you not exit thro a gable wall - core drill etc rather than out via the roof tiles - then you can do that with a weather tight roof?

[Wuey]

There are no options other than to go through the pitched roof.

 

Sorry I’ve not been clear with the question though.

 

It’s not the actual flue that the query is about.  We need a flue flashing kit but must of the ones for sale are for specific brands.  But surely a 125mm flue needs a flashing kit with a 125mm opening and that 125mm isn’t going to change just because the flue brand changes?  Or is it the case that each different brand isn’t exactly 125mm and they all have their own sizes?

 

 

[SimonD]

You need to use the manufacturer's flue for the relevant boiler. There's no getting around this. The flues nowadays are mostly 100mm with 125mm options in some cases where necessary. It is no major issue to install a vertical flue through a pitched roof so you'll either need to decide on the boiler now, or just get the roof done and then fit flue later when more appropriate.