My 19 year old Riello G5X is the same, there is a gasket between the boiler and the flange that the burner sits in (with one bolt) but none otherwise but it does have a "conical" seat and I don't see any sign of blow past on my yearly clean out.
Yep, the flange gasket is the important one - but you can get gaskets that you can slip over the blast tube.
One or two screw fitment is the norm, and seems to give no problems.
John
Well I can assure you your view is totally and utterly wrong.
The number of riello burners I've fitted is well into 4 figures not the odd one your doing!
Well I can assure you your view is totally and utterly wrong.
The number of riello burners I've fitted is well into 4 figures not the odd one your doing!
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