Thanks for the input. I pulled the ice maker, gonna pull the cooler tonight just to check and will trace the vent line to install one.
It was wierd, have pumped out 5-6 timeS, never full or near. No odors up until this week. Only things that have happened we're I had a dozen people on it 2 nights ago, only 2 women used the head, gave thourogh instructions. I then pumped out yesterday afternoon.
Today, I woke up at 4 am with fowl odor, went home. Came back and could smell it 12 docks away. I pumped out, filled, and agitated several times. Dumped a new treatment in. Odor seems to be less, but still there. It's a sulfuric smell, not too poo smelling. When I went for the pumpout I sniffed the tank and it smelled fine. I did crawl around the ER and it seems concentrated in the stbd rear corner where the exhaust is. I thought a dead cat may have been there but that, unfortunately, was not the cause. I'm going to finish washing her down and attempt a night here again, will report in the morning!
Ken, while Cedar Point does a good job on their restrooms, I don't want to #2 in a public rest room lol. If I can't take care of nature on my boat, I don't want it lol. I may conceed if they were to start purchasing a upgraded toilet paper (from me maybe!). Are you still floating?
Thanks for any thoughts!
Jim