I was swapping out the water fill valve on Mother's washer today and she said that sometimes, not all the time, she thinks she can smell gas. I also could smell just a very faint whiff of captan while working on the washer. Not enough to burn, not enough to explode. Kind of like you smell when you walk past your gas meter and the odor comes from the vent. The stack has not been moved since it was installed 26 years ago. Nothing has been disconnected (until the water hoses today). I didn't have time to do any soapy water test, will do that next time. Would the coils cause this or is the valve itself beginning to have problems? If it were a connection it would smell ALL the time, not just sometimes. The dryer works perfectly and she hopes the stack will last her the rest of her life.