Sewer Gases

If you smell a nasty smell in your basement it could be coming from the floor drain. many new homes feed water to the drain U Bend (P trap) every time a close toilet flushes. Older homes do not and the trap may dry out releasing the odours from the drains to enter your home. Refill the trap with water and then add a small amount of cooking oil ( maybe a cups worth ) to float on top of the water and create a seal to prevent the evaporation.