On September 19, 2017 at 00:25, Audiophiliac said...
How does water get in the conduit? Unglued or poorly glued junctions? Does the glue eventually fail? Is the glue permeable? Is the conduit permeable? I always assumed schedule 80 with properly glued junctions were water tight. Wrong?
We do not deal with this often so I am just throwing curiosity out there.
Condensation...
Difference in temperature of the air in the conduit and the outside/inside wall of the conduit.
