Condensing pipe run's?

[bobbo85]

Can i pick your brains please . I am a week into replacing 12 combi boilers and the new are condensing boilers .The only thing id like to ask is the condensing pipe can i just use overflow pipe and can i link them up as there flats and the top floor has 4 flats ,so can just run 1 pipe and tee in then drop it down into the grid. I was going to run the 1st and 2nd floor boilers (8) into a rain water pipe with a strap on boss.Any ideas please

 

[clf-gas]

Look at the MI, you need to follow their instructions for condense waste.

 

[Agile]

What kind of drain does the rainwater go to?

Tony

 

[bobbo85]

It is going into a drain which also has a 1 1/2 waste pipe from a flat going into it. Im sumising that if that's going into it, then i can?.Thanks

 

[bengasman]

Does the manual not give you detailed instructions with several alternatives? If he boiler does not have a trap built in, it could lead flue gasses into the flat if done wrong. All manuals I have seen tell you exactly how to lead the pipes. You must use overflow pipe, never barrier or similar.