Hello all. I have a Thetford 565e Curve porta potti. I have replaced the seal between the top bowl and the bottom black tank four times in the last three years. The most recent seal replacement was 2 1/2 months ago and it is now leaking. I have taken it out and cleaned the seal and all of the plastic components on the toilet. Everything looks good; no cracks or damage to anything. After putting a small amount of water in the bowl, it slowly drains out of the bowl over the course of a few minutes. You can hear the water trickling into the tank below. The seal is a genuine Thetford part (lip seal 07101). This is ridiculous. Any ideas? TIA.
