I'm having an issue with the vent stack for the kitchen sink. I live in Canada and its now starting to get cold outside -16 C tonight and I've noticed over the last few days there has been quite a bit of condensation on the vent piping under the sink.
So far I've cut open the wall from the outside to see if there was an insulation problem and all was sealed up. I also put the hose down the stack to see if there was a leak anywhere and nothing. I've also tried extending that stack (vented through roof around a window separate from the main stack) around 14" high incase it was drawing air in but nothing seems to stop that vent from getting cold inside and condesating. Tonight I removed the 14" piece and stuck on a 36" high piece to see if that'll do anything.
Does anyone have any ideas as to what would cause this and/or any remedies to try?
Thanks in advance for any help
So far I've cut open the wall from the outside to see if there was an insulation problem and all was sealed up. I also put the hose down the stack to see if there was a leak anywhere and nothing. I've also tried extending that stack (vented through roof around a window separate from the main stack) around 14" high incase it was drawing air in but nothing seems to stop that vent from getting cold inside and condesating. Tonight I removed the 14" piece and stuck on a 36" high piece to see if that'll do anything.
Does anyone have any ideas as to what would cause this and/or any remedies to try?
Thanks in advance for any help