So in the summer only we have what can be a strong sewer smell in the unfinished part of the basement. What I don’t understand is the smell is only present in the summer time, not the winter. Following the smell I believe I have located the source which is under a shower in a bathroom that was renovated before we moved into the home. Everything is dry around the plumbing, but am wondering if it could possibly be coming from the flexible T fitting where the new PVC drain line and old copper drain line connect. Has anyone had experiences with these connections not working well.
And actually as I am typing this I am wondering where my vent stack is. With hotter temperatures outside, there may not be enough draw in this particular area to remove the gases.