Ron,
I have found the best way to end the odor problem in all my drains is to shut the BLACK WATER & GRAY WATER TANKS, shut all the sinks using the sink stoppers, and adding half water and half Clorox to every sink, at the same time I add the 1/2 water to 1/2 Clorox to all my toilets, the dishwasher, the clothes washer and finally I buy a flat sink/tub stopper to stop the shower from emptying too soon.
I let all drains sit for about 10 minutes then release all sinks, toilets and shower at the same time I run the clothes washer and the dish washer.
I let the solution stay in the BLACK & GRAY TANKS for 30 to 40 minutes and then empty then, close them again until the washers, both clothes and dish, finish. Then once a week I repeat in the routine in the toilets and sinks and no smell. This keeps bacteria way down and your coach smelling great. If you can't use Clorox, you can try Lysol or Mr. Clean with Febreze.
I have found that this way I can open and keep open my tanks without problems. Hope this helps you. This method also works in a non-moving house or apartment.
NANA
