Man oh Man Gon2ski I am really sorry to hear that. We took ours in and they replaced everything. All three valves and the switches. The manager of the service department told me that there seemed to be some sort of glue on the valves.. Yea okay maybe... anyway I have used it twice and they worked both times. We use twice the recommended amount of Odorlos and have been dumping the soapy water from the sink into the toilet. The camper as sat the last 2 months so I don't know if the problem has gone away for good. Heading to the races on the 19 so I will let you know. The leaking valve seems to have gone away also.. Fingers Crossed.