Hello all, new to the forum would love some discussion on a question. My basement floor drain is backing up. The municipality I live in has a program to install a back water valve so I have ordered the package. However, I'm not sure this is the issue. I get a puddle around the drain and the issue started during a heavy storm which leads me to believe its a backflow issue. BUT, I'm thinking this may be coincidence as it usually reoccurs after doing laundry or draining the upstairs tub. There is also a bit of an odour coming from the drain. My question, how do I know if the drain is clogged, or if it requires a back flow valve? Is the answer simply to get the drain snaked and see if the issue resolves? Thanks.