Hi everyone please help clear up my confusion re the correct fitting of flue pipes to a new Godin chauffeco 8kw freestanding woodstove. We have a 3year old bungalow and during the construction we had a stainless steel double skinned chimney installed and left unconnected until we decided to have a woodstove. Well we got a devis for the above stove and fitting, from our local French chauffage engineer and agreed the devis, so eventually he came to fit the stove. After we had had two fires, one morning we found a pool of water on top of the stove and it appeared that condensation had run down the OUTSIDE of the black flue pipes and left run marks on the pipes. On closer observation I noticed the flue pipes(single wall types) were installed with the female ends pointing downwards and on calling back the engineer Ipointed this out to him. He was adamant that it was correct. The spigot coming out of the stove (125mm) is slightly tapered but will only accept the female end of the flue pipe .This would mean the other end of the flue would be male and would be pointing UPWARDS so would have to join a female end of pipe pointing DOWNWARDS. I understand that all straight flue pipes are male at one end and female at the other so what is the answer? The distance from the top of the stove to the ceiling is about 1:80cm so does require at lease 2 pipes Please enlighten me. Barrington