ptrap

Hello, I'm installing my first Belfast/butler kitchen sink. It came with the waste and stainless steel drain. To my surprise the kit only has one washer in which the instructions clearly state that it should be placed underneath the sink. My question is, shouldn't there be a washer between the...

For about a year, my shower on a third floor is giving an on off gas smell sometimes after a shower and particularly in the morning not long after the sun rises enough to hit our roof. I usually run some water into my p-trap and the smell goes away after a few minutes. There is a tub right...