Our drains have an odor coming from them when we run water. It is all drains. At first we thought it was the water, but when you put water in a cup and smell it it smells fine. We had berber carpet installed in our newly finished basement 2 days ago, when this started. Don’t know if this is coincidental or not. Should we be concerned about the odor? It kind of smells like b.o. to me. How can we get rid of it?