I have had 3 estimates for replacing my old combi-boiler with either the Vaillant ecotec plus 824 or 831.
All of the fitters said that I would need a new 22mm gas feed from the meter, as the 15mm currently installed was not sufficient.
Looking through the Vaillant eco-tec range leaflet on their website, I see that both of these boiler have a 15mm gas inlet. Only the 837 boiler has a 22mm inlet.
So what is the need for 22mm?
Is it new regs or something?
Ta for any help.
All of the fitters said that I would need a new 22mm gas feed from the meter, as the 15mm currently installed was not sufficient.
Looking through the Vaillant eco-tec range leaflet on their website, I see that both of these boiler have a 15mm gas inlet. Only the 837 boiler has a 22mm inlet.
So what is the need for 22mm?
Is it new regs or something?
Ta for any help.