We have a kitchen vent stack that stops at the kitchen. It doesn't go to the roof. We live in an apartment building in England and was wondering if this is right? We have strong odor problems coming from the kitchen sink after running hot water down the sink, and sometimes after running the dishwasher. No plumbers can seem to figure out what is causing it except maybe the dishwasher doesnt have a vent on it? We rent so trying to get anything done has been a nightmare. Just wanted to get another opinion about this stack because I had one plumber tell me that it is ok because it is sealed there? I thought they had to vent? Just been worried it could be sewer fumes coming through since its not vented to the roof. Thank you for any replies.