I have a fairly new motor home, recently begun to notice a bit of a smell towards the rear. I have a feeling its something to do with the drainage pipes/waste water tank. I have flushed the system with disinfectant/water solution which seems to have helped. I guess one solution would be to take a waste master with us and allow waste water to drain directly into it. However does anyone know of any products that would clean the system without eating away the waste pipes?