I will have toilet and kitchen extractors exiting through the tiled
roof. Due to the low pitch, I cannot use standard tile vents or ridge
vents, I will need a flashed 110mm pipe for the outlet. Now, several
of these tend to look horrid. so can I combine the two outlets ?
They could be combined at the last minute using soil pipe connectors
to avoid back flow into the other ducts.
Cheers,
Simon.