I've noticed with our motorhome that when I drive it for more than a couple hours, I tend to get strong odors from the black tank seeping into the coach. Not sure why, but here's my theory....When pa...
Put a Pint of Pine Sol in your Gray tank and then drive. If you get Pine Sol odor in transit it is your Gray tank. RARELY do you get foul odors from the Black tank, especially if you use the Black tank treatments as you need to do. GRAY water smells horrible. Make sure your Washer drain P trap has water in it if you have a washer. If you do not use the washer regularly, the water siphons out and that is a main source of gray odor in transit. Doug