The flue (4) consists of a thin-walled vertical tube and there is a collar (K) surrounding this with a lip (15) which bears against the outer diameter of the flue. There is a slightly wider diameter cylindrical portion immediately underneath the lip. There is a flared conical portion ...
The cylindrical portion, flared portion and flange engage a similarly-shaped portion at the top of an especially square skirt (1) which fits over the waterproof underlay immediately under the tiles of the roof. There is a retaining ring (R) which fits inside the top of the skirt to hold ...
A vertical steam boiler is disclosed in the utility model, the inner furnace body is provided with a furnace liner which is upward and is connected with the vertical tube, the inner furnace liner is provided with an upper and a lower combustion chambers, the upper combustion chamber has a ...