Sewer Smell coming from shower drain
My problem differs from most that have asked this similar question.
6 months ago I had to replace my old leaking cast iron p-trap and drain in my shower. I replaced it with a PVC P-trap and new drain. I used a rubber gasket with a couple pipe clamps to connect the new PVC trap to the existing cast iron pipe. It has been working great, and no more leaks... but now a sewer smell emits from my shower drain. It couldn't possibly be a blockage since the Trap is only 6 months old? Is there anything I should check or can do to get rid of this powerful unpleasant odor??
In advance thanks for all your input and help.